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Nootropics, Scientific Evidence and Safety](https://nootropikler.com/): What are nootropics and how are they researched? Sourced ingredient profiles, scientific evidence, safety information and free tools for memory, focus, sleep and brain health. - [About - Our Mission and Editorial Principles](https://nootropikler.com/about): Nootropikler.com is an independent, evidence-based platform. Learn about our unsponsored editorial approach, source verification process, and scientific principles. - [Best Nootropics of 2026 - Expert Recommendations](https://nootropikler.com/best-nootropics): The most effective nootropics of 2026: expert-selected, evidence-based rankings for memory, energy, sleep and stress and a purchasing guide for Türkiye. - [Blog - Nootropics and Neuroscience Articles | Nootropikler.com](https://nootropikler.com/blog): Independent, research-led articles on neuroplasticity, dopamine, sleep and cognitive performance. In-depth writing from our editorial team. - [Nootropic Comparison Tool - Side by Side Comparison](https://nootropikler.com/compare): Compare two or more nootropics side by side: category, onset of action, recommended dose, half-life, safety, and level of evidence. Make your decision with data. - [Contact - Contact Us and Request Correction | Nootropikler.com](https://nootropikler.com/contact): Contact Nootropikler.com editorial team. Our contact form and e-mail address are available on this page for your questions, suggestions or content correction requests. - [Dictionary of Nootropics - More than 170 Concepts and Terms](https://nootropikler.com/dictionary): Over 170 nootropics concepts in one glossary: BDNF, NGF, AMPK, GABA, neuroplasticity, the glymphatic system and more, with clear definitions. - [Dosage and Timing Planner - Nootropic Usage Guide](https://nootropikler.com/dosage-timing): Recommended dosage range, daily split and optimal time of intake (morning/afternoon/evening) for your chosen nootropics. Evidence-based, customizable usage plan. - [Publication Guidelines: How to Read Nootropic Evidence and Sources?](https://nootropikler.com/editorial-policy): Separate human, animal, and cell studies. Learn the limits of nootropic evidence, verification of source links, editorial information, and proofreading process. - [Beginner's Guide - Starting Safely](https://nootropikler.com/guide): New to nootropics? Learn step by step how to create a safe protocol with the Starter Triad, dosing basics, safety rules, and cycling. - [Half-Life & Timing Calculator - Nootropic Effect Duration](https://nootropikler.com/half-life): Choose a nootropic and time of intake; See the decline curve in blood according to its half-life, window of effect and risk of effects on sleep. Evidence-based tool for accurate timing. - [Nootropic Interaction Checker - Safe Combination](https://nootropikler.com/interactions): Check for common known interactions between the nootropics you choose and the drug classes you use: serotonin syndrome, bleeding, sedation, and more. - [Disclaimer - Medical Disclaimer | Nootropikler.com](https://nootropikler.com/legal-disclaimer): Nootropikler.com content is for informational purposes only and is not medical advice. Disclaimers, legal status and important safety notices. - [MCP Guide - AI Access to Nootropic Database](https://nootropikler.com/mcp-guide): How do you connect to the Nootropikler.com MCP (Model Context Protocol) server? A guide to using the nootropics database as a tool for Claude, ChatGPT and other AI agents. - [Nootropic Finder - Find the Nootropic That Suits You](https://nootropikler.com/nootropic-finder): Choose your goal and preferences; A free interactive tool that recommends nootropics together based on the match based on your cognitive goal, level of evidence, and experience. - [Nootropic Encyclopedia - A to Z Guide](https://nootropikler.com/nootropics): Nootropics mechanisms, clinical evidence, dosage information and safety profiles. An encyclopedia of natural and synthetic compounds. - [Privacy Policy - Your Data and KVKK | Nootropikler.com](https://nootropikler.com/privacy): Nootropikler.com privacy policy: what data we collect, use of cookies, third-party services and information about your rights under KVKK. - [Nootropic Research Sources: PubMed and Scientific Publication Index](https://nootropikler.com/references): Research resources for nootropic profiles and neuroscience articles. Browse verified PubMed records, pending citations, and related content together. - [Stack Analyzer - Analyze Your Own Nootropic Combination](https://nootropikler.com/stack-analysis): Choose the combination of nootropics you use; See automatic interaction & security auditing, function axis coverage, resource allocation and redundancy/gap analysis on a single screen. - [Nootropic Stack Builder - Combination by Target](https://nootropikler.com/stack-builder): Choose your goal (focus, memory, energy, sleep, stress, neuroprotection); See the synergistic nootropic combination, logic and automatic interaction control. - [Nootropics Stacks - Combinations](https://nootropikler.com/stacks): What is nootropic stacking? Sample nootropic stacks for focus, memory, stress and energy. Logic, components and safety notes of synergistic combinations. - [Nootropics Tools – Compare, Plan, Check](https://nootropikler.com/tools): Free interactive nootropic tools: side-by-side comparisons, dose and timing planning, goal-based stack building, and interaction checking. - [Nootropic Topics: Memory, Focus, Sleep and Brain Health](https://nootropikler.com/topics): Explore nootropic research on memory, attention, energy, sleep, stress and neuroplasticity. Sourced profiles, reading paths and related tools. ## Nootropic profiles - [5-HTP](https://nootropikler.com/nootropics/5-htp): What is 5-HTP? Effect on mood, sleep and appetite as a serotonin precursor, clinical evidence, dosage protocol, SSRI interaction and safety guidance. - [Acetyl-L-Carnitine](https://nootropikler.com/nootropics/acetyl-l-carnitine): What is Acetyl-L-Carnitine (ALCAR)? Evidence and dosage on mitochondrial function, acetylcholine synthesis, age-related cognitive decline, and neuroprotection. - [Alpha-GPC](https://nootropikler.com/nootropics/alpha-gpc): What is Alpha-GPC? The most effective source of choline, which increases acetylcholine synthesis and improves cognitive speed, focus and performance. Dosage and safety guide. - [aniracetam](https://nootropikler.com/nootropics/aniracetam): What is Aniracetam? AMPA receptor modulation, anxiolytic effect, dosage protocols, difference with piracetam and use in Türkiye. Comprehensive guide. - [Apigenin](https://nootropikler.com/nootropics/apigenin): What is apigenin? Flavonoid from chamomile: GABA-A modulation, anxiolytic effect, sleep support, dosage protocols and safety information. Comprehensive guide. - [ashwagandha](https://nootropikler.com/nootropics/ashwagandha): What is Ashwagandha (Withania somnifera)? Ayurvedic adaptogen that reduces stress, anxiety and fatigue by regulating cortisol. KSM-66 form and dosage guide. - [Bacopa Monnieri](https://nootropikler.com/nootropics/bacopa-monnieri): What is Bacopa Monnieri (Brahmi)? Ayurvedic herb increases memory consolidation with bacocide compounds. Clinical evidence, dosage protocol and safety information. - [Berberine](https://nootropikler.com/nootropics/berberine): What is berberine? AMPK activation, effects on brain health, metformin comparison, dosage and safety. Comprehensive guide. - [CDP-Choline](https://nootropikler.com/nootropics/cdp-choline): What is CDP-Choline (Citicoline)? Effect on acetylcholine and phosphatidylcholine synthesis, dopamine receptors, clinical evidence, 250-500 mg dosage and safety guide. - [Centella asiatica (Gotu Kola)](https://nootropikler.com/nootropics/centella-asiatica): What is Centella asiatica (Gotu Kola)? BDNF, neuroplasticity, anxiolytic effect and triterpenoids. Ayurvedic cognitive supplement's dosage and safety guide. - [Coenzyme Q10](https://nootropikler.com/nootropics/coenzyme-q10): What is Coenzyme Q10 (CoQ10/Ubiquinone)? Mitochondria ATP production, electron transport chain, ubiquinol vs ubiquinone difference, dosage protocols and safety information. guide. - [cordyceps](https://nootropikler.com/nootropics/cordyceps): What is Cordyceps mushroom? Effects on ATP production, oxygen use efficiency and cognitive performance, militaris vs sinensis comparison and dosage. - [Creatine](https://nootropikler.com/nootropics/creatine): How does creatine monohydrate increase brain energy? Clinical evidence, dosage and safety information on ATP regeneration, memory and neuroprotection. - [curcumin](https://nootropikler.com/nootropics/curcumin): What is curcumin? Active component of turmeric, effects on neuroinflammation, BDNF increase and depression, bioavailability problem and solutions. guide. - [DMAE](https://nootropikler.com/nootropics/dmae): What is DMAE? Dimethylaminoethanol, acetylcholine precursor effect, effects on cognitive clarity, focus and mood. Dosage protocol and safety information. - [Ginkgo Biloba](https://nootropikler.com/nootropics/ginkgo-biloba): What is Ginkgo biloba? Plant that increases cerebral blood flow, supports memory and protects neurons with its antioxidant properties. Dosage and safety guide. - [Huperzine A](https://nootropikler.com/nootropics/huperzine-a): What is Huperzine A? Clinical evidence, dosage protocol and cyclical usage guide on acetylcholinesterase inhibition, memory consolidation and learning. - [L-Theanine](https://nootropikler.com/nootropics/l-theanine): What is L-Theanine? This amino acid in green tea increases alpha brain waves, potentiating caffeine and providing focus and sleep quality without anxiety. - [L-Tyrosine](https://nootropikler.com/nootropics/l-tyrosine): What is L-Tyrosine? Effect on dopamine and norepinephrine production, cognitive performance under stress, dosage protocols and side effects. Comprehensive guide. - [Melisa (Lemon Balm)](https://nootropikler.com/nootropics/lemon-balm): What is Melissa? GABA-T inhibition mechanism, effects on anxiety and cognitive performance, dosage protocols and safety. Comprehensive guide. - [Lion's Mane](https://nootropikler.com/nootropics/lions-mane): What is Lion's Mane mushroom? Effect on NGF and BDNF production, clinical evidence, dosage protocols, side effects and where to find it in Türkiye? guide. - [Mg L-Threonate](https://nootropikler.com/nootropics/magnesium-l-threonate): What is Magnesium L-Threonate? The only form of magnesium that crosses the blood-brain barrier. NMDA modulation, synaptic density and sleep quality. Dosage and safety guide. - [melatonin](https://nootropikler.com/nootropics/melatonin): What is melatonin? guide on its effect on circadian rhythm, sleep latency and jet-lag, clinical evidence, low dose protocol and interactions. - [modafinil](https://nootropikler.com/nootropics/modafinil): What is Modafinil? Mechanism of action, effects on cognitive performance, dosage, side effects and legal status in Türkiye. Comprehensive guide. - [Mucuna Pruriens](https://nootropikler.com/nootropics/mucuna-pruriens): What is Mucuna pruriens? Effects on dopamine synthesis, Parkinson's support, mood and motivation as a natural source of L-DOPA. Dosage and safety guide. - [N-Acetyl L-Tyrosine](https://nootropikler.com/nootropics/n-acetyl-l-tyrosine): What is N-Acetyl L-Tyrosine (NALT)? Cognitive protection under stress and sleep deprivation as a precursor of dopamine and noradrenaline, 350-500 mg acute dosage guide. - [NAC (N-Acetyl Cysteine)](https://nootropikler.com/nootropics/nac): What is NAC? Glutathione synthesis, effects on brain health, role in OCD and addiction treatment, dosage and side effects. Comprehensive guide. - [NMN](https://nootropikler.com/nootropics/nmn): What is NMN? Anti-aging effect as NAD+ precursor, effects on mitochondrial health and cognitive function, Sinclair studies and dosage guide. - [noopept](https://nootropikler.com/nootropics/noopept): What is Noopept? Synthetic nootropic that is 1000 times more potent than Piracetam. NGF and BDNF expression, AMPA/NMDA modulation, dosage protocols and safety guidance. - [Omega-3 DHA/EPA](https://nootropikler.com/nootropics/omega-3): Why are omega-3 DHA and EPA essential supplements for the brain? Evidence, dosage and safety on cell membrane structure, neuroinflammation, depression and neuroplasticity. - [Oxiracetam](https://nootropikler.com/nootropics/oxiracetam): What is Oxiracetam (oxiracetam)? Racetam focused on logical thinking and speed. AMPA/NMDA modulation, choline synergy, dosage protocols and safety information. guide. - [Panax Ginseng](https://nootropikler.com/nootropics/panax-ginseng): What is Panax Ginseng (Korean Ginseng)? Effect of ginsenosides on mental fatigue, working memory and blood glucose, clinical evidence and dosage. - [phenibut](https://nootropikler.com/nootropics/phenibut): What is Phenibut? GABA-B agonist mechanism, effects on anxiety and sleep, tolerance and addiction risks. Comprehensive guide. - [Phenylpiracetam](https://nootropikler.com/nootropics/phenylpiracetam): What is phenylpiracetam? Phenyl derivative of Piracetam. Information, dosage and safety on psychostimulant effect, cognitive enhancement and physical performance increase. - [Phosphatidylserine](https://nootropikler.com/nootropics/phosphatidylserine): What is phosphatidylserine (PS)? Regulation of cortisol as a cell membrane phospholipid, its effect on memory and age-related cognitive decline, and dosage guidance. - [Piracetam](https://nootropikler.com/nootropics/piracetam): What is Piracetam? The first synthetic nootropic. AMPA modulation, acetylcholine synergy, clinical evidence, dosage protocols and safety information. guide. - [PQQ (Pyrrolo Quinoline Quinone)](https://nootropikler.com/nootropics/pqq): What is PQQ? Mitochondrial biogenesis, BDNF increase and neuroprotection mechanisms, dosage protocols and safety. Comprehensive guide. - [pramiracetam](https://nootropikler.com/nootropics/pramiracetam): What is Pramiracetam? One of the most powerful molecules of the Racetam family; Fat soluble, increases HACU, supports memory and focus. Dosage, choline synergy and safety. - [resveratrol](https://nootropikler.com/nootropics/resveratrol): What is resveratrol? Effects on brain health, SIRT1 activation, anti-aging mechanisms, dosage protocols and side effects. Comprehensive guide. - [rhodiola rosea](https://nootropikler.com/nootropics/rhodiola-rosea): What is Rhodiola rosea? Siberian adaptogen, containing salidroside and rozavin, reduces mental fatigue, increases endurance and provides protection by regulating cortisol. - [Saffron Extract](https://nootropikler.com/nootropics/saffron): What is saffron extract? Crocus sativus and crocin/safranal components, antidepressant effect, clinical evidence and dosage protocol. Comprehensive guide to Türkiye. - [shilajit](https://nootropikler.com/nootropics/shilajit): What is Shilajit? Himalayan mineral resin, fulvic acid content, effects on mitochondrial energy, testosterone and CoQ10, and dosage guide. - [St. John's wort](https://nootropikler.com/nootropics/st-johns-wort): What is St. John's Wort? Hypericin and hyperforin mechanisms, effects on depression, drug interactions and dosage. Comprehensive guide. - [Sulbutiamine](https://nootropikler.com/nootropics/sulbutiamine): What is sulbutiamine? Thiamine-derived lipophilic vitamin B1, effects on fatigue relief, motivation and brain energy, dosage protocol and safety. - [taurine](https://nootropikler.com/nootropics/taurine): What is Taurine? GABAergic effects on the brain, neuroprotection, sleep support, dosage and safety. Comprehensive guide. - [Tongkat Ali](https://nootropikler.com/nootropics/tongkat-ali): What is Tongkat Ali? Eurycoma longifolia effects on testosterone, cortisol and cognitive performance, dosing protocols and safety. Comprehensive guide. - [Uridine Monophosphate](https://nootropikler.com/nootropics/uridine): What is Uridine Monophosphate? Effects on synaptic plasticity, cell membrane structure and BDNF. Super synergy and dosage guide with Choline-Omega-3. - [Valerian (Valerian)](https://nootropikler.com/nootropics/valerian): What is valerian? Mechanism of valerenic acid, effects on sleep quality, anxiety support, dosage and side effects. Comprehensive guide. - [vinpocetine](https://nootropikler.com/nootropics/vinpocetine): What is vinpocetine? Clinical evidence, dosage protocol and safety information on PDE1 inhibition, cerebral blood flow increase and cognitive clarity. - [Vitamin D3](https://nootropikler.com/nootropics/vitamin-d3): What is Vitamin D3? Effects on brain health, role in depression and cognitive protection, deficiency symptoms, dosage protocols. Comprehensive guide. ## Blog - [Anti-Aging Brain: Anti-aging Nootropic Protocol](https://nootropikler.com/blog/anti-aging-brain): Is it possible to slow cognitive decline? Evidence-based anti-aging brain protocol with NMN, resveratrol, Lion's Mane and berberine. - [Athlete Brain Performance: Aiming for Physical and Mental Peak Together](https://nootropikler.com/blog/athletic-brain-performance): Cognitive performance for athletes: how creatine, L-Tyrosine, Rhodiola and caffeine increase both athletic and mental capacity. Pre- and post-workout protocol. - [Getting Started with Nootropics: The Essential Guide for Beginners](https://nootropikler.com/blog/beginners-guide-to-nootropics): How to start nootropics safely? The Essential step-by-step guide with the Getting Started Trio, single-variable testing, circularization, and security principles. - [Caffeine and L-Theanine: The Most Proven Nootropic Duo](https://nootropikler.com/blog/caffeine-l-theanine): Why does the combination of Caffeine + L-Theanine work? Scientific guide on calm but sharp focus, correct ratio (1:2), dosage, timing and evidence base. - [Natural Supplements for Depression and Anxiety: An Evidence-Based Guide](https://nootropikler.com/blog/depression-and-anxiety): High-evidence natural nootropics for mild-to-moderate depression and anxiety: mechanisms with saffron, 5-HTP, St. John's wort, L-Theanine and magnesium. - [Motivation with the Dopamine System and Nootropics](https://nootropikler.com/blog/dopamine-and-motivation): How do dopamine pathways manage motivation? A look at the impact of nootropics such as L-Tyrosine, Mucuna pruriens and Rhodiola on dopamine and motivation. - [Gut-Brain Axis and Cognitive Performance](https://nootropikler.com/blog/gut-brain-axis): What is the gut-brain axis, how does the vagus nerve work, how does the microbiome affect neurotransmitter production? Current science on cognitive performance and mood. - [Mitochondria and Brain Energy: The Origin of Cognitive Fatigue](https://nootropikler.com/blog/mitochondria-and-the-brain): Mitochondria produce brain energy. How do CoQ10, PQQ, NMN and creatine help against the background of ATP deficiency, brain fog and cognitive fatigue? - [Neuroplasticity: How Does the Brain Rewire Itself?](https://nootropikler.com/blog/neuroplasticity-guide): What is neuroplasticity, how do BDNF and NGF work? guide on the scientific support of synaptic plasticity, LTP and nootropics for brain structuring. - [Nootropic Cycling: How to Avoid Tolerance?](https://nootropikler.com/blog/nootropic-cycling): What is the nootropic cycle, why does tolerance develop? Which substances require cycling and which can be used continuously? Evidence-based strategies. - [Nootropic Stacks: 5 Proven Combinations](https://nootropikler.com/blog/nootropic-stacks): What are the most effective nootropic combinations? 5 proof stacks for focus, memory, energy and sleep – ingredients, mechanisms of synergism and starting doses. - [Best Nootropics to Improve Sleep Quality](https://nootropikler.com/blog/sleep-and-nootropics): How does sleep architecture work? We look at the support of nootropics such as magnesium, L-Theanine, apigenin, melatonin and glycine for more restful sleep. - [Chronic Stress and the Brain: The Effect of Cortisol on Cognitive Performance](https://nootropikler.com/blog/stress-and-cortisol): How does chronic stress affect the brain? Damages of cortisol on the hippocampus and prefrontal cortex and the role of adaptogens in limiting this damage. - [Brain-Critical Vitamins and Minerals: The Cognitive Cost of Deficiency](https://nootropikler.com/blog/vitamins-minerals-and-the-brain): Deficiency of vitamin D, B12, magnesium and zinc directly impairs cognitive performance. Critical micronutrients for the brain, deficiency symptoms and optimal supplement doses. - [Nootropics for Women: Hormonal Cycle and Cognitive Performance](https://nootropikler.com/blog/women-and-nootropics): The female hormonal cycle directly affects cognitive performance. Interaction of estrogen, progesterone and nootropics – woman-specific supplements and cycle-oriented protocol. ## Nootropik News — English - [Mood changes and intrusive thoughts were linked to remembering intended actions](https://nootropikler.com/news/affective-changes-intrusive-thoughts-prospective-memory): A study tested 120 younger and older adults; 117 entered prospective-memory analyses. Mood changes and intrusive thoughts were associated with remembering intended actions, but the results do not establish a causal mechanism or a treatment for memory problems. - [Nature Neuroscience opens a special issue on neurotechnology and brain-computer interfaces](https://nootropikler.com/news/neurotechnology-special-issue-editorial-october-2026): An October 1 editorial introduces a special issue on how neurotechnology links brain research, assistive devices and questions about data governance; it is an editorial overview, not a new experiment. - [Brain connectivity patterns differed between Alzheimer’s pathology and aging](https://nootropikler.com/news/alzheimer-connectivity-gradients-aging-biofinder-adni): MRI analyses in BioFINDER-2 and ADNI linked Alzheimer’s pathology and age to different whole-cortex connectivity gradients. The cohort findings describe associations and do not establish a diagnostic test or causal mechanism. - [Small blackcurrant blend trial finds selective attention changes in older adults](https://nootropikler.com/news/blackcurrant-theanine-pine-bark-attention-crossover): A crossover trial analyzed 26 older adults after four-week periods of a blackcurrant, L-theanine and pine-bark blend or placebo. Attention-task false alarms declined, but memory and fatigue findings were not significant after multiple-testing correction; the blend cannot isolate an ingredient. - [A machine-learning model estimated future cognitive impairment in Parkinson’s disease](https://nootropikler.com/news/parkinsons-tabpfn-cognitive-impairment-prediction): A retrospective study reported AUCs of 0.822 internally and 0.742 in an external cohort for a TabPFN model. The authors say prospective multicenter validation is needed before clinical use. - [Human hippocampal neuron populations carried information about word meaning](https://nootropikler.com/news/human-hippocampus-distributed-semantic-code): Recordings during narrative listening linked distributed hippocampal activity patterns to word semantics, including after analyses accounted for phonetics and grammar. - [Short black cardamom trial reports attention-test gains, with industry funding](https://nootropikler.com/news/black-cardamom-extract-short-attention-trial): A 14-day trial randomized 96 adults to black cardamom extract, caffeine, their combination or placebo; 85 entered the final analysis. Reported test gains need independent replication and do not establish lasting cognitive benefit. - [Brain recordings mapped shared and distinct signals for imagined and spoken speech](https://nootropikler.com/news/imagined-speech-neural-architecture-ecog): High-density recordings during awake surgery found shared planning signals and distinct sensorimotor patterns for imagined versus spoken syllables, a result that may inform future speech interfaces. - [Matching mask conditions helped recognition in one of two face-memory experiments](https://nootropikler.com/news/masked-face-recognition-context-congruency): Two experiments using low-resolution real-life images found a congruency benefit when masked faces were encoded in the first experiment, but not the second. Accuracy was modest overall. - [Mouse study links gut bacterial indole pathway to stroke injury and immune response](https://nootropikler.com/news/gut-microbiota-indole-stroke-severity-immune-response): Experiments in mice found that bacterial indole signaling influenced post-stroke immune activity and brain injury. A human stroke cohort showed an association between bacterial tnaA abundance and poorer outcomes, but the mechanism remains unproven in people. - [Anesthesia shared a neural-dynamics signature across six species](https://nootropikler.com/news/cross-species-neural-dynamics-under-anesthesia): A cross-species analysis of brain recordings found shorter local neural timescales and weaker interregional synchrony under anesthesia; thalamic stimulation reversed the pattern in macaques. - [Battery-free radio-powered stimulator worked in freely moving mice](https://nootropikler.com/news/wireless-rf-neurostimulation-freely-moving-mice): An animal-device study tested a wireless transcranial stimulator powered by radiative radio waves; it maintained output across a cage and induced circling when aimed at a motor region. - [Television and computer use showed opposite links with cognition in older adults](https://nootropikler.com/news/screen-time-types-and-cognition-older-adults): Across four aging cohorts, more television viewing tracked with lower cognitive scores, while computer use tracked with higher scores. Mendelian-randomization results offered supportive but assumption-dependent evidence. - [Uncertainty in the environment reduced planning effort in a human task](https://nootropikler.com/news/environmental-stochasticity-reduces-human-planning-effort): Across three forms of environmental uncertainty, participants planned less, responded sooner and used simpler decision policies that were less sensitive to option values. - [Study found no detectable APOE ε4 differences in cognition among healthy young adults](https://nootropikler.com/news/apoe4-young-adult-cognition-navigation-null): Among 1,000 healthy adults aged 18–35, ε3ε4 carriers did not differ detectably from ε3ε3 carriers on navigation or several cognitive tasks. The result applies to this sample and age range. - [Cortical layers changed differently as mice learned a whisker task](https://nootropikler.com/news/cortex-wide-laminar-dynamics-learning-mice): Wide-field imaging across 25 cortical areas found distinct, sometimes opposing layer 2/3 and layer 5 activity changes as male mice learned a whisker-based task. The study maps learning-related dynamics but does not isolate all causal contributions. - [Gut microbiota and indole-3-lactic acid linked to cognitive recovery in vascular-impairment study](https://nootropikler.com/news/gut-ila-axis-vascular-cognitive-impairment): A clinical cohort and mouse experiments linked microbial tryptophan metabolism to cognition and glymphatic function. The clinical observations were exploratory; the intervention evidence came from mice. - [Amygdala-to-striatum pathway modulated repetitive behavior in mice](https://nootropikler.com/news/amygdala-striatum-circuit-repetitive-behavior-mice): A mouse study mapped a direct amygdala–dorsolateral striatum projection that modulated stimulus-evoked grooming and was strengthened in a compulsive-grooming model. It is an animal circuit finding, not evidence of a human cause or treatment. - [Small living-brain biopsies offered a direct view of Alzheimer’s pathology](https://nootropikler.com/news/alzheimer-pathology-living-brain-biopsy-proteomics): In 18 people undergoing shunt surgery for suspected normal-pressure hydrocephalus, researchers found amyloid plaques in nine biopsies and mapped plaque chemistry and tau turnover. The selected surgical sample limits generalization. - [Rhesus macaques adjusted decision speed in ways linked to accuracy](https://nootropikler.com/news/macaques-metacognitive-control-decision-accuracy): In a two-choice task, rhesus macaques were more accurate on faster responses even after accounting for difficulty. A monitoring model could explain the pattern, though it does not directly prove subjective confidence. - [COSMOS biomarker analysis finds no two-year effect from multivitamin or cocoa extract](https://nootropikler.com/news/cosmos-multivitamin-cocoa-neurodegeneration-biomarkers): In a randomized trial substudy of older adults, neither a multivitamin nor cocoa extract changed three blood biomarkers over two years compared with placebo. These biomarker results do not settle whether supplements affect cognition through other pathways. - [NIH-backed atlas maps cell activity across brain disorders](https://nootropikler.com/news/nih-single-cell-atlas-brain-disorders): NIH announced molecular maps built from over 6.3 million cell nuclei and 1,494 donors, providing a research resource for Alzheimer’s and related brain disorders. - [Striatum-targeted stimulation shifted choices about mental effort in a human study](https://nootropikler.com/news/temporal-interference-stimulation-mental-effort): In a small experiment with healthy adults, temporal-interference stimulation altered how participants weighed rewards and cognitive effort, alongside changes in striatal and cingulate signals. - [Visual-attention estimates were not clearly interchangeable across two tasks](https://nootropikler.com/news/visual-attention-estimates-depend-on-task): Thirty participants completed two visual-attention tasks. Estimates averaged 58 Hz in one and 49 Hz in the other, but analyses did not establish a clear difference or equality. - [A meal-based MIND-style diet improved cognitive scores in a small MCI trial](https://nootropikler.com/news/mind-based-diet-mci-cluster-rct-korea): In an open-label 12-week Korean trial of 80 adults with MCI, both meal-provided MIND diet groups improved K-MMSE2 scores versus control; the abstract gives no effect size. - [Small human cohort links pollutant exposure, gut microbes and attention measures](https://nootropikler.com/news/pah-gut-microbiome-attention-impulsivity-cohort): In 34 adults, measured polycyclic aromatic hydrocarbon exposure, microbiome profiles and neurobehavioral groupings covaried. No individual microbial genus survived correction as associated with the behavior grouping, so candidate links remain exploratory. - [Daily fatigue and faster-than-usual performance preceded less fatigue override](https://nootropikler.com/news/fatigue-processing-speed-override-daily-life): A coordinated analysis of six real-world studies found that higher-than-usual fatigue and faster processing speed each predicted stronger fatigue-performance coupling hours later, a marker of less fatigue override. - [Reciprocal visual-cortex signals helped mouse brain areas agree](https://nootropikler.com/news/reciprocal-visual-cortex-connections-consensus): Mouse recordings, optogenetic perturbations and circuit models indicated that reciprocal V1–LM connections prolonged congruent visual activity while resolving inconsistent signals. The finding concerns a simple visual task and model-based interpretation. - [A combined prism-and-game program improved some post-stroke cognitive scores](https://nootropikler.com/news/mindlenses-poststroke-cognitive-rehabilitation-trial): In a 60-person randomized stroke trial, a prism-adaptation and tablet-game device improved memory from three months and language at post-treatment checks versus standard rehabilitation. - [FDA expands toxic yellow oleander alert to Niwali and Easy Forte products](https://nootropikler.com/news/fda-yellow-oleander-niwali-easy-forte-alert): The FDA added Niwali Tejocote Pieces, Niwali Tejocote Capsules and Easy Forte Natural Fiber to an existing safety alert after tests detected toxic yellow oleander. The agency advises stopping use and contacting a health care provider. - [Blood metabolite profile linked Mediterranean diet adherence with selected cognitive measures](https://nootropikler.com/news/mediterranean-diet-metabolite-signature-cognition-cohorts): A two-cohort study derived a 23-metabolite blood signature associated with Mediterranean-diet adherence and some cognitive measures. Transfer to the second cohort was weak until the model was recalibrated, and the study was observational. - [Recognition-memory changes tracked progression in an early Alzheimer’s cohort](https://nootropikler.com/news/alzheimer-recognition-memory-progression-cohort): A 24-month study of 278 older adults with amnestic mild cognitive impairment found that lower recognition discriminability and early decline predicted conversion to Alzheimer’s dementia after adjustment for other measures. - [Astrocytes formed timed activity sequences during mouse memory recall](https://nootropikler.com/news/hippocampal-astrocyte-sequences-memory-mice): Imaging in mice found compressed CA1 astrocyte calcium sequences during fear conditioning and their reappearance in the conditioned context. The recordings are correlational and do not show that astrocytes create or are necessary for memory. - [Cerebellar cells tracked delayed neural stimulation rewards in mice](https://nootropikler.com/news/cerebellar-dopamine-reward-prediction-mice): In mice, cerebellar granule cells predicted delayed rewards from dopamine-neuron or medial forebrain bundle stimulation, while climbing fibers responded afterward. Perturbations supported a role in this task, without establishing effects on human cognition. - [Adaptive brain-computer interface algorithms reshaped neural learning in monkeys](https://nootropikler.com/news/assistive-algorithms-shape-bci-learning): Longitudinal recordings and a neural-network model suggest that adaptive BCI decoders concentrated task information into fewer neural signals during practice, unlike fixed decoders. - [Social disadvantage tracked persistently lower self-rated memory in a large cohort](https://nootropikler.com/news/social-disadvantage-subjective-memory-longitudinal-cohort): Across six waves of data from 14,938 Chinese adults aged 45 and older, accumulated social disadvantage was associated with persistently lower self-rated memory, which correlated weakly with objective cognition. - [One brain implant decoded speech and gestures together in paralysis study](https://nootropikler.com/news/speech-gesture-paralysis-brain-computer-interface): A three-participant study used one cortical implant to decode attempted speech and gestures, showing a proof of concept for more natural communication through a brain-computer interface. - [Overlapping ventral hippocampal codes tracked rapid retrieval of fear memories in mice](https://nootropikler.com/news/ventral-hippocampus-overlapping-fear-memory-codes): Calcium imaging in mice found that fear learning made threatening and neutral context representations more similar in ventral CA1, where threat-related activity returned rapidly during retrieval. - [Review pools observational evidence on dietary choline and cognition](https://nootropikler.com/news/dietary-choline-cognition-observational-evidence-review): A systematic review and dose-response meta-analysis assessed observational studies of dietary choline and cognitive outcomes. The evidence concerns associations in existing studies, not whether choline supplements prevent decline. - [Fear learning altered inhibitory synapses in distinct parts of mouse CA1 neurons](https://nootropikler.com/news/ca1-inhibitory-synapses-remodel-with-fear-learning): Longitudinal imaging found that trace fear conditioning reorganized dendritic inhibitory synapses but stabilized those at the axon initial segment of hippocampal pyramidal neurons. - [Sleep efficiency, rather than duration, tracked executive scores over two years](https://nootropikler.com/news/sleep-efficiency-executive-function-repeated-cohort): Among 233 adults aged 55 and older, higher wearable-measured sleep efficiency was associated with better executive function, while sleep duration and self-rated quality showed no significant link to cognitive domains. - [Food insecurity and stress were associated with cognitive-task differences in college students](https://nootropikler.com/news/food-insecurity-stress-college-student-cognition): A cross-sectional study of 230 college students linked food insecurity and stress with differences on attention, decision-making and memory-matching tasks. These associations cannot establish that food access caused the scores. - [Exercise studies point to distinct brain activation patterns for working memory](https://nootropikler.com/news/exercise-working-memory-fmri-meta-analysis): An activation-likelihood meta-analysis of 11 fMRI studies found partly different activation changes after exercise interventions and in long-term exercisers. The small evidence base makes the maps exploratory. - [Meta-analysis finds modest cognitive signals from ketogenic diets, with lipid trade-offs](https://nootropikler.com/news/ketogenic-diet-cognitive-impairment-meta-analysis): A 12-trial review found pooled cognitive signals in older adults with impairment alongside higher total cholesterol and LDL-C. - [Post-COVID study reports links between gut microbes and brain imaging measures](https://nootropikler.com/news/post-covid-gut-microbiome-brain-imaging-associations): A small cross-sectional study associated gut-microbe patterns with symptoms and MRI measures in post-COVID condition. It does not show that the microbiome caused brain changes or symptoms. - [Near-nerve stimulation showed promise as an EEG measure in a small consciousness study](https://nootropikler.com/news/near-nerve-stimulation-consciousness-assessment): A single-center pilot compared nerve stimulation with skin stimulation in 19 people with prolonged disorders of consciousness; the authors call for external validation of the EEG-based measure. - [Persistent loneliness tracked with poorer health in an older-adult cohort](https://nootropikler.com/news/loneliness-isolation-trajectories-older-adult-health): A longitudinal analysis of 4,090 English adults linked chronic loneliness with poorer physical and mental health. Ending isolation was associated with better cognition, but observational data cannot establish cause and effect. - [Long-term cohort separates Alzheimer pathology from cognitive resilience](https://nootropikler.com/news/alzheimer-pathology-cognitive-resilience-longitudinal-risk): In 3,119 older adults followed for a median 13.7 years, pathology and a derived cognitive-resilience measure independently tracked dementia risk; the observational analysis does not show causation. - [Frontal tau was associated with disrupted sleep waves and poorer memory](https://nootropikler.com/news/frontal-tau-linked-to-disrupted-sleep-waves-and-memory): Across older-adult cohorts using tau PET, EEG and cerebrospinal-fluid markers, higher frontal tau was associated with less-traveling sleep slow waves and poorer overnight memory. - [Feature interference was linked to decision errors when task cues were uncertain](https://nootropikler.com/news/feature-interference-cost-of-task-uncertainty): Human behavior, monkey V1 recordings and modeling linked uncertainty about which perceptual task to perform with stronger coding of irrelevant features and less distinct neural representations. - [Thirst during hot-weather cycling affected concentration ratings, not executive-test scores](https://nootropikler.com/news/thirst-satiation-heat-exercise-executive-function): In 12 men, water and intravenous saline produced similar hydration, but saline left participants thirstier and more thermally strained; flanker-task and mood scores did not differ. - [Odor learning reorganized neural representations in zebrafish](https://nootropikler.com/news/odor-learning-reorganizes-brain-representations-in-zebrafish): Odor-discrimination training in juvenile and adult zebrafish increased separation of task-relevant neural patterns in pDp, and this representational geometry tracked individual performance. - [Rare cortical inhibitory neurons promoted synchronized activity and sleep in mice](https://nootropikler.com/news/cortical-sst-chodl-neurons-promote-sleep-mice): Selective activation of Sst-Chodl inhibitory neurons promoted cortical synchrony and sleep in mice. The September journal publication extends circuit research previously available as a preprint; it does not establish a human sleep treatment. - [Freestanding submicron electrode design targets flexible brain-surface recordings](https://nootropikler.com/news/submicron-ecog-electrode-array): Engineers reported a thin, freestanding electrocorticography array inspired by dragonfly-wing structure, addressing a materials trade-off relevant to future brain-computer interfaces. - [Community Parkinson’s rehabilitation program was followed by better cognitive test scores](https://nootropikler.com/news/parkinsons-pd-core-cognitive-rehabilitation): In a 45-person pre–post study, a seven-session group program was followed by gains on global cognition and practical judgment tests. Without a control group, the study cannot separate treatment effects from practice or other changes. - [A multidomain health profile tracked cognitive ageing across three cohorts](https://nootropikler.com/news/intrinsic-capacity-profile-cognitive-aging-three-cohorts): Across 26,022 adults in three ageing cohorts, impairments in non-cognitive health domains were associated with lower cognitive scores and greater risk of later cognitive impairment. - [Tau-linked mitochondrial process reduced deficits in animal models](https://nootropikler.com/news/nih-tau-mitochondria-reverse-electron-transport): NIH highlighted experiments linking altered tau to mitochondrial reverse electron transport; blocking that pathway helped models, not patients in a clinical trial. - [Study links longer naps with slower processing speed in older adults](https://nootropikler.com/news/pointer-zzz-napping-apnea-cognition): A baseline analysis of 686 older U.S. POINTER participants associated longer daytime naps with lower processing speed; causality and an apnea interaction were not established. - [Multi-omics analysis proposes stage-linked Parkinson’s biomarker candidates](https://nootropikler.com/news/parkinsons-proteo-metabolomic-stage-biomarkers): A secondary analysis of Parkinson’s Progression Markers Initiative data combined CSF and plasma proteins and metabolites to identify candidate markers. The machine-learning findings are exploratory and need independent clinical validation. - [UK Biobank cohort links dietary niacin density with cognition and dementia risk](https://nootropikler.com/news/niacin-diet-density-cognition-dementia-cohort): A large population cohort study examined dietary niacin equivalents in relation to cognitive function and incident dementia; its observational design cannot show that increasing niacin prevents decline. - [Distinct memories were linked to more precise visual attention](https://nootropikler.com/news/distinct-memories-help-focus-on-visual-targets): In a human fMRI and eye-tracking visual-search task, more distinct hippocampal memory patterns were associated with more accurate memory-guided eye movements and less competitor activation. - [SUPPLX recalls two products after undeclared yohimbine finding](https://nootropikler.com/news/fda-recalls-products-undeclared-yohimbine): SUPPLX voluntarily recalled Business Pill and Branch Manager for Men after testing identified undeclared yohimbine; FDA posted the notice on September 4. - [Small sham-controlled Alzheimer’s trial reports cognitive gains after cerebellar stimulation](https://nootropikler.com/news/alzheimer-cerebellar-rtms-fnirs-rct): In a 33-person randomized trial, two weeks of cerebellar rTMS was followed by better global cognition than sham through week 12. fNIRS changes were hemodynamic measures, not direct recordings of neural activity. - [European survey links very long sleep and daytime naps with cognitive impairment](https://nootropikler.com/news/european-sleep-duration-cognition-share-analysis): A cross-sectional analysis of 88,889 SHARE interviews associated sleep of at least 10 hours and daytime napping with lower cognition; it cannot establish whether sleep patterns cause impairment. - [Structured early practice shaped flexible learning in mice](https://nootropikler.com/news/structured-practice-shaped-flexible-learning-in-mice): In mice learning a timing task, structured early examples supported more flexible later strategies and task-related entorhinal activity; the study also tested predictions from a neural-network model. - [Alzheimer’s biomarkers marked a Parkinson’s subgroup with faster decline](https://nootropikler.com/news/parkinsons-alzheimer-biomarker-cognitive-profiles): In a prospective cohort, 42 of 449 biomarker-positive Parkinson’s participants met Alzheimer’s biomarker criteria and later showed greater cognitive and motor decline. The observational result is prognostic, not causal. - [Glutamate concentration shifted AMPA receptor signaling states at mouse synapses](https://nootropikler.com/news/glutamate-levels-tune-ampa-receptor-conductance): Experiments on mouse interneuron synapses found that lower glutamate exposure changed AMPA receptor properties through the occupancy of different conductance states. - [Two mouse parietal areas showed distinct roles in visual and choice tasks](https://nootropikler.com/news/mouse-parietal-cortex-functional-architecture): Mesoscopic imaging of thousands of mouse neurons found that medial parietal areas AM and A represented visual/choice information and choice history/posture differently. The study maps functional organization; it does not establish that these areas alone cause the behaviors. - [Late-life semaglutide improved memory measures in mice; human effects remain unknown](https://nootropikler.com/news/nih-semaglutide-late-life-mice-cognition): An NIH-reported mouse study found late-life semaglutide improved spatial memory measures; clinical relevance to people has not been established. - [Study maps multiple gut-microbe kingdoms in major depression and cognition](https://nootropikler.com/news/multi-kingdom-gut-microbiome-depression-cognition): A study of 121 young adults with first-episode depression and 117 controls found differences across bacterial, viral, fungal and archaeal signals. Its cross-sectional design cannot establish that microbiome changes cause depression or cognitive differences. - [A brain-imaging method mapped how cortical signal flow shifts with mental state](https://nootropikler.com/news/human-cortical-signal-flow-hierarchy-changes-with-state): A validated effective-connectivity framework inferred a human cortical hierarchy that flattened during externally focused processing and steepened during internally focused states. - [AI model reconstructed deep-brain signals from cortical recordings for DBS research](https://nootropikler.com/news/deep-learning-subcortical-signal-reconstruction-dbs): A multicenter analysis of recordings from people with movement disorders tested whether a generative model could infer subcortical activity from cortical signals to help address gaps in closed-loop stimulation data. - [Pregnancy food-support trial reports differences in fetal brain structures](https://nootropikler.com/news/mikhuna-prenatal-diet-fetal-brain-growth): In an Ecuadorian randomized trial of 215 pregnancies, a food-diversity program was associated with growth differences in several fetal brain structures; the study measured anatomy, not later cognition. - [Probiotic trial in early cognitive impairment examines cognition and tau markers](https://nootropikler.com/news/multistrain-probiotics-early-cognitive-impairment): A 24-week randomized trial in 87 people with early cognitive impairment found lower pTau181 and selective visuospatial signals, but no MMSE, verbal-memory or executive-score difference. - [Theta rhythms may mark memories for sleep consolidation](https://nootropikler.com/news/theta-rhythms-may-mark-memories-for-sleep-consolidation): In 31 young adults, EEG during word–object learning linked stronger theta activity with later sleep-wave coupling and memory retention after a nap; the association does not establish causation. - [How a memory is recalled left a trace in later brain activity](https://nootropikler.com/news/recalling-a-memory-leaves-a-trace-in-brain-activity): In an fMRI experiment, retrieval prompts shaped later neural patterns for learned image–word pairs, even though participants performed similarly on the memory test. - [FDA warns against supplement-grade glutathione in injectable compounds](https://nootropikler.com/news/fda-glutathione-injection-quality-alert): FDA reported adverse events in at least 30 patients after compounded IV glutathione and warned against using supplement-grade material for injections. - [Spinal stimulation added to treadmill training had limited gait effects in Parkinson’s](https://nootropikler.com/news/parkinson-spinal-magnetic-stimulation-treadmill-trial): A 70-person randomized Parkinson trial found short-term walking-speed and later freezing-of-gait signals from stimulation plus treadmill training, but no sustained overall advantage. - [Glutamine did not change mood or cognition during brief simulated high-altitude exposure](https://nootropikler.com/news/glutamine-hypoxia-cognition-rct): In a randomized trial of young men, six hours of simulated hypoxia at 4,500 m did not alter psychobiological measures, and glutamine supplementation did not produce a detectable benefit. - [NIH report describes DNA-folding differences in aging and Alzheimer’s](https://nootropikler.com/news/nih-dna-organization-alzheimers-aging): An August NIH report highlighted altered DNA contacts and gene activity in postmortem prefrontal cells from Alzheimer’s donors; the study does not establish causality. - [Peanut trial finds no significant cognitive or brain-activation benefit](https://nootropikler.com/news/peanut-consumption-memory-complaints-rct): A 12-week peanut trial in 27 older adults with memory complaints found no significant group differences in cognition, brain activation or adjusted biomarkers. - [Wake-responsive neurons helped regulate sleep drive in mice](https://nootropikler.com/news/wake-history-neurons-regulate-sleep-drive-in-mice): Manipulating wake-responsive neurons in mice altered NREM sleep and sleep pressure, identifying candidate circuits for sleep regulation without showing that reduced sleep is safe. - [Long-lived brain organoids show features of later human development](https://nootropikler.com/news/nih-brain-organoids-long-term-maturation): NIH reported that stem-cell-derived brain organoids matured over nearly six years, with molecular age tracking elapsed time; these are laboratory models. - [Mouse brain reused neural components across cognitive operations](https://nootropikler.com/news/reusable-modular-cognition-mouse-brain): During a delayed-match task, mice reused prefrontal and parietal neural subspaces for stimulus processing and memory maintenance. Data-constrained network models supported a modular account, but the result concerns one task and does not prove human cognitive modules. - [Mediterranean diet shifts metabolic markers in an interim MCI analysis](https://nootropikler.com/news/mediterranean-diet-metabolomics-mci-interim): In 47 older adults with mild cognitive impairment, a 24-week Mediterranean-diet intervention changed several plasma metabolites; some metabolite changes correlated with cognitive scores. Correlation does not establish cognitive benefit. - [FDA updates an existing kratom import alert with an August supplier entry](https://nootropikler.com/news/fda-adds-kratom-supplements-to-import-detention-alert): The August 17 version of FDA Import Alert 54-15 includes a new listed supplier; its kratom detention mechanism predates 2026 and applies to specified imports. - [Protein-enriched Mediterranean diet trial reports modest cognitive score differences](https://nootropikler.com/news/promed-protein-mediterranean-exercise-cognition): A six-month trial in 105 older adults at risk of undernutrition and cognitive decline found improved nutritional status and small neurocognitive-score differences in diet-counseling groups versus a leaflet control. - [Prebiotic-fibre bread study focuses on feasibility and cognition in older adults](https://nootropikler.com/news/prebiotic-fibre-bread-older-adults-feasibility): A feasibility trial tested bread delivering an extra 10 g/day of prebiotic fibre in older adults with low habitual fibre intake; it was designed to assess feasibility and preliminary outcomes. - [Memory traces persisted through artificial hibernation in mice](https://nootropikler.com/news/memory-traces-persist-after-artificial-hibernation-in-mice): After induced hibernation in mice, selected memories persisted despite loss of more than half of hippocampal synapses; clustered memory-linked connections were preferentially retained. - [TIMP2 altered age-related microglial states in mice](https://nootropikler.com/news/timp2-microglia-aging-mouse-brain): TIMP2 deletion worsened several age-associated microglial measures in mice, while treatment in aged mice shifted inflammatory profiles and phagocytosis. These preclinical findings do not show cognitive benefit or establish a safe human intervention. - [UW announcement highlights gut metabolite linked with Alzheimer-related changes](https://nootropikler.com/news/gut-imidazole-propionate-alzheimer-announcement): A University of Wisconsin announcement described a gut-bacterial metabolite associated with cognition in people and Alzheimer-like changes in experimental models; the paper itself was published June 26. - [Small trial links scallop-derived plasmalogens with higher verbal-memory scores](https://nootropikler.com/news/scallop-plasmalogens-verbal-memory-rct): A 12-week trial in 68 selected Japanese adults reported a small verbal-memory signal for scallop-derived plasmalogens; longer-term effects remain unknown. - [Twelve-week creatine trial reports exploratory cognitive markers alongside strength changes](https://nootropikler.com/news/creatine-cognition-middle-aged-older-adults-rct): A 12-week creatine study in 64 completers described cognitive findings as exploratory, while exercise and diet participation was self-selected. - [Endocannabinoid plasticity supported one-shot learning in mice](https://nootropikler.com/news/striatal-endocannabinoids-one-shot-learning-mice): A single brief contact with sticky tape produced later avoidance in mice and corticostriatal plasticity; disrupting the endocannabinoid pathway impaired learning. The new aversion task is an animal model, not evidence of human memory enhancement. - [A pilot meditation and breathwork trial reduced anxiety in Parkinson’s disease](https://nootropikler.com/news/parkinson-meditation-breathwork-anxiety-pilot-trial): In a small randomized pilot, six weeks of remote meditation and breathwork reduced Parkinson-related anxiety versus a wait-list group; the study focused on anxiety, not cognition. - [Human brain-tissue study links altered glucose storage with Alzheimer pathology](https://nootropikler.com/news/brain-glucose-glycogen-alzheimer-human-brains): A study of 230 postmortem brains linked glycogen-related structures with Alzheimer tau pathology, including changes seen at early pathological stages. The tissue analysis cannot establish which changes came first or whether changing diet would help. - [Digital cognitive training improved executive scores in a small RBD trial](https://nootropikler.com/news/cogtrail-rbd-cognitive-training-executive-function): In 82 people with isolated REM sleep behavior disorder, a five-week digital cognitive-training and lifestyle-guidance program was linked to modest executive-function gains versus a waiting-list group. - [A holographic microscope let researchers probe communication between brain areas](https://nootropikler.com/news/two-photon-holographic-mesoscope-neural-circuits): A new two-photon system stimulated selected mouse neurons across a millimetre-scale field while imaging downstream responses. It supports circuit experiments across areas; it remains a specialized research tool, not a human application. - [Rehabilitation after advanced Parkinson therapy showed a possible cognitive signal](https://nootropikler.com/news/parkinson-device-aided-therapy-rehabilitation-cognition): In an open randomized study of 54 people starting device-aided Parkinson therapy, tailored rehabilitation was linked to better cognitive performance at one year, a secondary finding needing confirmation. - [A caffeine-matched trial finds no added attention benefit from an energy drink formula](https://nootropikler.com/news/caffeine-matched-energy-drink-attention-trial): In 116 adults, an energy drink did not outperform a beverage matched for 200 mg caffeine on attention or memory after one acute test session. - [Researchers describe mitochondrial plaques in Alzheimer’s model brains](https://nootropikler.com/news/mitochondrial-plaques-alzheimers-neuronal-processes): In Alzheimer’s-model mice and postmortem human tissue, researchers identified mitochondrial accumulations in neuronal processes alongside impaired lysosomal clearance. The finding describes pathology; it does not establish a treatment or cognitive effect. - [Macaque memory assemblies differed according to time since learning](https://nootropikler.com/news/macaque-experience-reorganizes-memory-traces): Recordings in macaques found that sleep reactivation differed for new, recent and older learned sequences; older memories formed more stable, interconnected assemblies. The cross-sectional primate study cannot track individual cells changing over time. - [Four-week 16:8 eating-window trial found no added cognitive effect](https://nootropikler.com/news/time-restricted-eating-working-memory-women): In 43 healthy women, working memory and attention improved over time in both groups, with no significant cognitive advantage for 16:8 time-restricted eating over usual diet. - [Small GeNeurofil pilot reports cognitive and biomarker changes in MCI](https://nootropikler.com/news/geneurofil-mci-pilot-trial): In a six-month pilot with 54 people with mild-to-moderate cognitive impairment, GeNeurofil was associated with improved test scores and lower plasma markers; the authors call for larger confirmatory trials. - [Small Alzheimer’s trial tests a plant-rich ketogenic diet combined with fasting](https://nootropikler.com/news/plant-rich-ketogenic-fasting-alzheimer-trial): In a six-month assessor-blinded trial of 60 people receiving standard Alzheimer’s care, the combined intervention group had a mean MMSE increase while control scores declined. The design cannot separate diet from fasting. - [AI-guided nutrition study reports cognitive changes in undernourished care residents](https://nootropikler.com/news/ai-guided-nutrition-long-term-care-cognition): A staged study of 108 long-term-care residents found nutritional and cognitive measures improved mainly in the most undernourished group after tailored food support. The design cannot show that AI itself caused the changes. - [Mouse skill replay persisted without the hippocampus](https://nootropikler.com/news/procedural-memory-replay-independent-hippocampus): During sleep, trained mice replayed dorsal-striatal activity sequences linked to procedural experience even after hippocampal lesions. Replay predicted later task gains, but selectively disrupting replay is still needed to establish its causal role. - [Supplement review finds mixed cognitive signals across Alzheimer’s and MCI trials](https://nootropikler.com/news/supplements-mci-alzheimer-network-review-2026): A 29-trial network review found mixed signals across cognitive tests in Alzheimer’s disease and mild cognitive impairment; no supplement significantly improved ADAS-Cog. - [Human hippocampal immune cells shift during midlife](https://nootropikler.com/news/human-hippocampus-immune-cells-shift-in-midlife): Postmortem hippocampal tissue from 40 adults aged 20–95 showed a midlife shift in immune-cell populations, including fewer resident microglia and more inflammatory, blood-cell-like cells. - [Historical sugar rationing linked to later-life brain and mental-health outcomes](https://nootropikler.com/news/early-life-sugar-rationing-brain-aging): A natural-experiment study compared adults exposed to early-life sugar rationing with later-born cohorts and found associations with later brain aging and health outcomes; the historical design cannot prove dietary causation. - [Online study links long COVID with lower working-memory scores](https://nootropikler.com/news/long-covid-linked-to-lower-working-memory-scores): In a cross-sectional online study of 1,064 people, reported long COVID was associated with lower scores on a brief visual working-memory test; one task cannot diagnose broad impairment. - [FDA closes investigation of Salmonella outbreak tied to MOGO moringa capsules](https://nootropikler.com/news/fda-closes-moringa-salmonella-outbreak-investigation): FDA’s July 17 closeout reported 34 illnesses and 11 hospitalizations linked to specified MOGO moringa capsule lots; recalled stock may remain in homes. - [Timed cued recall increased memory gains across repeated tests](https://nootropikler.com/news/cued-recall-format-increases-repeated-memory-retrieval): Across four experiments, constrained initial-letter cues produced larger gains over repeated recall than free recall, but the advantage disappeared when participants could answer in any order. - [Hippocampal dendrites process learning signals on their own](https://nootropikler.com/news/hippocampal-dendrites-process-learning-signals): Voltage imaging in navigating mice found that some hippocampal CA3 dendrite signals changed before the cell body in a novel setting, supporting local dendritic processing without proving a memory benefit. - [Blood p-tau217 levels tracked later cognitive impairment risk in older adults](https://nootropikler.com/news/blood-ptau217-predicts-risk-of-cognitive-impairment): A pooled observational analysis of 2,684 initially unimpaired adults linked higher blood p-tau217 with greater later risk of cognitive impairment; 10-year estimates for the highest group were less certain. - [LatAm-FINGERS trial tests a multidomain program for cognitive decline risk](https://nootropikler.com/news/latam-fingers-lifestyle-cognition-trial): A large Latin American randomized trial tested exercise, diet, cognitive training and vascular-risk management in at-risk older adults; the intervention produced a modest advantage on its primary cognitive outcome. - [Ceperognastat did not slow clinical progression in an Alzheimer’s trial](https://nootropikler.com/news/ceperognastat-alzheimers-phase2-trial-no-clinical-benefit): In a 327-person phase 2 trial, ceperognastat did not meaningfully slow early symptomatic Alzheimer’s disease over 100 weeks; the higher dose showed faster modelled progression than placebo. - [US agencies open process to schedule concentrated 7-OH products](https://nootropikler.com/news/dea-begins-7-oh-scheduling-process): FDA’s July 13 update described a temporary-scheduling proposal for concentrated 7-OH and synthetic derivatives, distinguishing the process from a final order. - [Random sounds during a nap disrupted slow waves and recall](https://nootropikler.com/news/random-sleep-audio-disrupted-slow-waves-and-recall): In a two-session nap study of 20 healthy men, random sounds reduced slow-wave sleep and impaired figural associative recall, but not verbal or procedural memory; the paper appeared June 25 and Freiburg announced it July 9. - [Two MRI markers were associated with cognitive progression in early MS](https://nootropikler.com/news/multiple-sclerosis-mri-markers-cognitive-progression): In 87 people with early relapsing-remitting multiple sclerosis, MRI markers at diagnosis were associated with later cognitive decline independent of relapses or MRI activity. - [Sleep-time noise disrupted hippocampal memory signals in rats](https://nootropikler.com/news/sleep-noise-interrupts-hippocampal-memory-consolidation-in-rats): In sleeping rats, brief sounds timed to hippocampal sharp-wave ripples reduced ripple activity and disrupted retention in one memory task, while effects varied by task. - [A regional brain-age pattern linked a blood tau marker with cognition](https://nootropikler.com/news/regional-brain-age-pattern-links-tau-marker-and-cognition): A cross-sectional analysis of 71 older adults found an indirect p-tau217–cognition association through one MRI brain-age pattern; direct and total associations were not significant. - [Fortified corn flour did not improve cognitive scores in a trial of Ethiopian teenage girls](https://nootropikler.com/news/vitamin-fortified-corn-flour-teen-cognition-ethiopia): A six-month trial of 472 girls found no significant cognitive benefit from folate- and B12-fortified corn flour; a language-test difference appeared in a secondary analysis by stunting status. - [Higher ultra-processed food intake linked to poorer attention in an Australian cohort](https://nootropikler.com/news/ultra-processed-foods-attention-apoe4): A cross-sectional analysis of 2,192 Australian adults associated a greater ultra-processed-food share with a slightly lower attention score, but found no clear memory link and cannot establish causation. - [FDA cites Alzheimer’s and anxiety claims on one green tea seller’s site](https://nootropikler.com/news/fda-warns-green-tea-seller-over-disease-treatment-claims): A July 2 FDA letter challenged a seller’s Alzheimer’s, Parkinson’s and anxiety claims for green tea; the action concerns marketing and drug approval, not a new efficacy trial. - [MCT-derived ketones were studied as an alternative brain fuel during hypoglycemia](https://nootropikler.com/news/mct-ketones-hypoglycemia-working-memory-t1d): A small human study found that four weeks of an MCT diet was associated with better working-memory accuracy during induced hypoglycemia in type 1 diabetes; reaction time did not improve. - [Hippocampal theta sweeps tracked remembered goals in rats](https://nootropikler.com/news/goal-directed-hippocampal-theta-navigation): In rats navigating an open arena, learning-dependent hippocampal theta sequences predicted routes to remembered goals and coordinated with prefrontal activity. This identifies a candidate planning circuit, not proof that the sequences cause navigation. - [Midlife Alzheimer’s blood markers linked with cognitive scores in cohort](https://nootropikler.com/news/nih-midlife-alzheimer-biomarkers-cognition): A July NIH report highlighted a CARDIA cohort study linking blood amyloid and tau markers with midlife cognitive differences; the results are observational. ## Nootropik News — Türkçe - [Duygu değişimleri ve istemsiz düşünceler, yapılacak işleri hatırlamayla ilişkiliydi](https://nootropikler.com/tr/news/affective-changes-intrusive-thoughts-prospective-memory): Çalışmada 120 genç ve ileri yaştaki yetişkin test edildi; ileriye yönelik bellek analizlerine 117 kişi girdi. Duygu değişimleri ve istemsiz düşünceler, planlanan işleri hatırlamayla ilişkiliydi; sonuçlar nedensel bir mekanizma veya bellek sorunlarına tedavi göstermiyor. - [Nature Neuroscience nöroteknoloji ve beyin-bilgisayar arayüzlerine özel sayı açtı](https://nootropikler.com/tr/news/neurotechnology-special-issue-editorial-october-2026): 1 Ekim tarihli bir editoryal, nöroteknolojinin beyin araştırmaları, yardımcı cihazlar ve veri yönetişimi sorularını nasıl bir araya getirdiğini ele alıyor; bu yeni bir deney değil, editoryal bir genel bakıştır. - [Beyin bağlantı örüntüleri Alzheimer patolojisi ve yaşlanmada farklı eksenlerde değişti](https://nootropikler.com/tr/news/alzheimer-connectivity-gradients-aging-biofinder-adni): BioFINDER-2 ve ADNI verilerindeki MRI analizleri, Alzheimer patolojisi ile yaşı tüm korteks bağlantısının farklı gradyanlarıyla ilişkilendirdi. Kohort bulguları ilişki gösteriyor; tanı testi veya nedensel mekanizma kanıtlamıyor. - [Küçük siyah frenk üzümü karışımı çalışması ileri yaştakilerde seçici dikkat değişimleri buldu](https://nootropikler.com/tr/news/blackcurrant-theanine-pine-bark-attention-crossover): Çapraz çalışma, siyah frenk üzümü, L-teanin ve çam kabuğu karışımı veya plaseboyla dört haftalık dönemler sonrasında 26 kişiyi analiz etti. Yanlış alarmlar azaldı; bellek ve yorgunluk bulguları çoklu test düzeltmesinden sonra anlamlı değildi. Karışım tek bir bileşenin etkisini ayıramaz. - [Makine öğrenimi modeli Parkinson’da gelecekteki bilişsel bozulmayı öngördü](https://nootropikler.com/tr/news/parkinsons-tabpfn-cognitive-impairment-prediction): Retrospektif çalışmada TabPFN modeli için iç doğrulamada AUC 0,822, bağımsız dış kohortta 0,742 bildirildi. Yazarlar klinik kullanımdan önce ileriye dönük, çok merkezli doğrulama gerektiğini belirtiyor. - [İnsan hipokampus nöron toplulukları sözcük anlamı hakkında bilgi taşıdı](https://nootropikler.com/tr/news/human-hippocampus-distributed-semantic-code): Hikâye dinleme sırasında yapılan kayıtlar, fonetik ve dilbilgisi hesaba katıldıktan sonra da dağılmış hipokampus etkinlik örüntülerini sözcük anlamıyla ilişkilendirdi. - [Kısa siyah kakule çalışması şirket finansmanıyla dikkat testlerinde kazanımlar bildirdi](https://nootropikler.com/tr/news/black-cardamom-extract-short-attention-trial): 14 günlük çalışma 96 yetişkini siyah kakule özütü, kafein, ikisinin birleşimi veya plaseboya ayırdı; son analize 85 kişi girdi. Bildirilen test kazanımları bağımsız doğrulama gerektiriyor ve kalıcı bilişsel yararı göstermiyor. - [Beyin kayıtları, zihinde canlandırılan ve sesli söylenen konuşmanın ortak ve ayrı sinyallerini haritaladı](https://nootropikler.com/tr/news/imagined-speech-neural-architecture-ecog): Uyanık beyin ameliyatındaki yüksek yoğunluklu kayıtlarda, zihinde canlandırılan ve sesli söylenen heceler için ortak planlama sinyalleri ile farklı duyusal-motor örüntüler bulundu. Bulgular, konuşma arayüzleri için klinik etkinlik kanıtı değildir. - [İki yüz belleği deneyinden birinde maske koşullarının eşleşmesi tanımayı destekledi](https://nootropikler.com/tr/news/masked-face-recognition-context-congruency): Düşük çözünürlüklü gerçek yaşam görüntülerini kullanan iki deneyde, maskeli yüzlerin kodlandığı ilk deneyde eşleşme yararı bulundu; ikinci deneyde bulunmadı. Genel doğruluk mütevazı düzeydeydi. - [Fare çalışması bağırsak bakterilerindeki indol yolunu inme hasarı ve bağışıklık yanıtıyla ilişkilendirdi](https://nootropikler.com/tr/news/gut-microbiota-indole-stroke-severity-immune-response): Fare deneyleri, bakteriyel indol sinyalinin inme sonrası bağışıklık etkinliğini ve beyin hasarını etkilediğini gösterdi. İnsan inme kohortunda bakteri tnaA bolluğu ile daha kötü sonuçlar arasında ilişki görüldü; ancak mekanizma insanlarda kanıtlanmış değil. - [Anestezi altı türde ortak bir sinirsel dinamik imzasıyla ilişkiliydi](https://nootropikler.com/tr/news/cross-species-neural-dynamics-under-anesthesia): Türler arası beyin kaydı analizi anestezi sırasında daha kısa yerel sinirsel zaman ölçekleri ve bölgeler arası daha zayıf eşzamanlılık buldu; makaklarda talamus uyarımı örüntüyü tersine çevirdi. - [İleri yaştaki yetişkinlerde televizyon ve bilgisayar kullanımı bilişle zıt ilişkiler gösterdi](https://nootropikler.com/tr/news/screen-time-types-and-cognition-older-adults): Dört yaşlanma kohortunda daha fazla televizyon izleme daha düşük biliş puanlarıyla, bilgisayar kullanımı ise daha yüksek puanlarla ilişkiliydi. Mendelci randomizasyon sonuçları destekleyici, ancak varsayımlara bağlı kanıt sundu. - [Pille ihtiyaç duymayan radyo enerjili uyarıcı serbest hareket eden farelerde çalıştı](https://nootropikler.com/tr/news/wireless-rf-neurostimulation-freely-moving-mice): Bir hayvan ve cihaz çalışması, yayılan radyo dalgalarıyla çalışan kablosuz transkraniyal uyarıcıyı sınadı; cihaz kafes boyunca çıkışını korudu ve motor bölge hedeflendiğinde dairesel harekete yol açtı. - [Çevresel belirsizlik, insanlarda planlama çabasını azalttı](https://nootropikler.com/tr/news/environmental-stochasticity-reduces-human-planning-effort): Üç çevresel belirsizlik biçiminde katılımcılar daha az plan yaptı, daha çabuk yanıt verdi ve seçenek değerlerine daha az duyarlı, daha basit karar kuralları kullandı. - [Çalışmada sağlıklı genç yetişkinlerde APOE ε4 ile biliş arasında saptanabilir fark bulunmadı](https://nootropikler.com/tr/news/apoe4-young-adult-cognition-navigation-null): 18–35 yaşlarındaki 1.000 sağlıklı yetişkinde ε3ε4 taşıyıcıları navigasyon veya çeşitli biliş görevlerinde ε3ε3 taşıyıcılarından saptanabilir biçimde farklı değildi. Sonuç bu örneklem ve yaş aralığı için geçerlidir. - [Fareler bıyık görevini öğrenirken korteks katmanları farklılaştı](https://nootropikler.com/tr/news/cortex-wide-laminar-dynamics-learning-mice): Erkek fareler bıyık temelli görevi öğrenirken 25 kortikal alandaki geniş alan görüntüleme, 2/3 ve 5. katman etkinliğinde farklı, kimi zaman zıt değişimler buldu. Çalışma öğrenme dinamiklerini haritalıyor; tüm nedensel katkıları ayırmıyor. - [Damar kaynaklı bilişsel bozukluk çalışmasında bağırsak mikrobiyotası ve indol-3-laktik asit](https://nootropikler.com/tr/news/gut-ila-axis-vascular-cognitive-impairment): Bir klinik kohort ve fare deneyleri, mikrobiyal triptofan metabolizmasını biliş ve glifatik işlevle ilişkilendirdi. Klinik gözlemler keşif niteliğindeydi; müdahale kanıtı farelerden geldi. - [Amigdala-striatum yolu farelerde tekrarlayıcı davranışı etkiledi](https://nootropikler.com/tr/news/amygdala-striatum-circuit-repetitive-behavior-mice): Bir fare çalışması, uyaranla tetiklenen tımarlanmayı etkileyen ve kompulsif tımarlanma modelinde güçlenen doğrudan amigdala-dorsolateral striatum bağlantısını haritaladı. Bu hayvan devresi bulgusudur; insanlarda neden veya tedavi kanıtı değildir. - [Canlı beyin biyopsileri Alzheimer patolojisini doğrudan inceleme olanağı sundu](https://nootropikler.com/tr/news/alzheimer-pathology-living-brain-biopsy-proteomics): Normal basınçlı hidrosefali şüphesiyle şant ameliyatı geçiren 18 kişide dokuz biyopside amiloid plakları saptandı; araştırmacılar plak kimyasını ve tau dönüşümünü inceledi. Cerrahi örneklemin seçilmiş olması genellemeyi sınırlar. - [Rhesus makakları karar hızını doğrulukla ilişkili biçimde ayarladı](https://nootropikler.com/tr/news/macaques-metacognitive-control-decision-accuracy): İki seçenekli bir görevde rhesus makakları, zorluk hesaba katıldıktan sonra bile daha hızlı yanıtlarda daha doğruydu. Bir izleme modeli bu örüntüyü açıklayabilir; ancak öznel güveni doğrudan kanıtlamaz. - [COSMOS biyobelirteç analizinde multivitamin veya kakao özütünün iki yıllık etkisi görülmedi](https://nootropikler.com/tr/news/cosmos-multivitamin-cocoa-neurodegeneration-biomarkers): Yaşlı yetişkinlerde randomize bir çalışma alt incelemesinde, multivitamin de kakao özütü de plaseboya kıyasla üç kan biyobelirteçini iki yılda değiştirmedi. Bu biyobelirteç sonuçları, takviyelerin başka yollarla bilişi etkileyip etkilemediğini yanıtlamıyor. - [NIH destekli atlas beyin hastalıklarında hücre etkinliğini haritaladı](https://nootropikler.com/tr/news/nih-single-cell-atlas-brain-disorders): NIH, 1.494 bağışçıdan 6,3 milyondan fazla hücre çekirdeğiyle oluşturulan moleküler haritaları duyurdu; veri, Alzheimer ve ilişkili beyin hastalıkları için araştırma kaynağıdır. - [İnsan çalışmasında striatuma yönelik uyarım zihinsel çaba seçimlerini değiştirdi](https://nootropikler.com/tr/news/temporal-interference-stimulation-mental-effort): Sağlıklı yetişkinlerle yapılan küçük bir deneyde zamansal girişim uyarımı, katılımcıların ödül ve bilişsel çabayı tartma biçimini değiştirdi; striatum ve singulat sinyallerinde de farklılıklar görüldü. - [Görsel dikkat tahminlerinin iki görev arasında birbirinin yerine kullanılabilir olduğu net değildi](https://nootropikler.com/tr/news/visual-attention-estimates-depend-on-task): Otuz katılımcı iki görsel dikkat görevini tamamladı. Tahminler bir görevde ortalama 58 Hz, diğerinde 49 Hz idi; ancak analizler fark ya da eşitlik konusunda net bir sonuca ulaşmadı. - [Küçük bir hafif bilişsel bozukluk çalışmasında öğün temelli MIND tarzı diyet bilişsel puanları artırdı](https://nootropikler.com/tr/news/mind-based-diet-mci-cluster-rct-korea): Hafif bilişsel bozukluğu olan 80 yetişkinin açık etiketli 12 haftalık Kore çalışmasında, öğün sağlanan iki MIND diyeti kolunun K-MMSE2 puanı kontrole göre yükseldi; özette etki büyüklüğü yok. - [Küçük bir insan kohortu kirletici maruziyeti, bağırsak mikropları ve dikkat ölçümlerini ilişkilendirdi](https://nootropikler.com/tr/news/pah-gut-microbiome-attention-impulsivity-cohort): 34 yetişkinde ölçülen polisiklik aromatik hidrokarbon maruziyeti, mikrobiyota profilleri ve nörodavranış gruplamaları birlikte değişti. Düzeltilmiş analizde hiçbir mikrop cinsi davranış grubuyla anlamlı ilişki göstermedi; bu nedenle aday bağlantılar keşif niteliğinde. - [Günlük yorgunluk ve olağandan hızlı performans, yorgunluğu bastırma kapasitesinin azalmasından önce geldi](https://nootropikler.com/tr/news/fatigue-processing-speed-override-daily-life): Altı gerçek yaşam çalışmasının eşgüdümlü analizi, olağandan yüksek yorgunluğun ve daha hızlı işlem hızının her birinin saatler sonra yorgunluk-performans bağını güçlendirdiğini; bunun daha az yorgunluğu bastırma göstergesi olduğunu buldu. - [Görsel korteks bölgeleri arasındaki çift yönlü sinyaller farelerde uzlaşmayı destekledi](https://nootropikler.com/tr/news/reciprocal-visual-cortex-connections-consensus): Fare kayıtları, optogenetik müdahaleler ve devre modelleri, V1-LM arasındaki çift yönlü bağlantıların uyumlu görsel etkinliği uzatıp çelişkili sinyalleri çözdüğüne işaret etti. Bulgular basit bir görsel görev ve modele dayalı yorumla sınırlı. - [Prizma ve oyunları birleştiren program inme sonrası bazı bilişsel puanları artırdı](https://nootropikler.com/tr/news/mindlenses-poststroke-cognitive-rehabilitation-trial): İnmeli 60 kişinin randomize çalışmasında prizma uyarlaması ve tablet oyunlarını birleştiren cihaz, standart rehabilitasyona kıyasla üçüncü aydan itibaren belleği ve tedavi sonrası değerlendirmelerde dili iyileştirdi. - [FDA, zehirli sarı zakkum uyarısına Niwali ve Easy Forte ürünlerini ekledi](https://nootropikler.com/tr/news/fda-yellow-oleander-niwali-easy-forte-alert): FDA, testlerde zehirli sarı zakkum saptanmasının ardından Niwali Tejocote Pieces, Niwali Tejocote Capsules ve Easy Forte Natural Fiber ürünlerini mevcut güvenlik uyarısına ekledi. Kurum kullanımı bırakmayı ve bir sağlık uzmanına başvurmayı öneriyor. - [Kan metabolit profili Akdeniz diyeti uyumunu seçili biliş ölçümleriyle ilişkilendirdi](https://nootropikler.com/tr/news/mediterranean-diet-metabolite-signature-cognition-cohorts): İki kohortlu çalışma, Akdeniz diyeti uyumu ve bazı biliş ölçümleriyle ilişkili 23 metabolitlik bir kan profili oluşturdu. İkinci kohorta aktarım, model yeniden ayarlanana kadar zayıftı; çalışma gözlemseldi. - [Tanıma belleğindeki değişimler erken Alzheimer kohortunda ilerlemeyle ilişkiliydi](https://nootropikler.com/tr/news/alzheimer-recognition-memory-progression-cohort): Amnestik hafif bilişsel bozukluğu olan 278 yaşlı yetişkinin 24 ay izlendiği çalışmada, tanıma belleğinde düşük ayırt etme ve erken düşüş Alzheimer demansına geçişi öngördü; analiz diğer ölçümlere göre düzeltildi. - [Farelerde bellek hatırlanırken astrositler zamansal etkinlik dizileri oluşturdu](https://nootropikler.com/tr/news/hippocampal-astrocyte-sequences-memory-mice): Farelerde görüntüleme, korku koşullandırması sırasında CA1 astrositlerinde sıkışmış kalsiyum dizileri ve koşullandırılmış bağlamda bunların yeniden belirmesini gösterdi. Kayıtlar korelasyoneldir; astrositlerin belleği oluşturduğunu veya gerekli olduğunu göstermez. - [Beyincik hücreleri farelerde gecikmeli sinir uyarımı ödülünü izledi](https://nootropikler.com/tr/news/cerebellar-dopamine-reward-prediction-mice): Farelerde beyincik granül hücreleri dopamin nöronu veya medial ön beyin demeti uyarımından gelen gecikmeli ödülü öngörürken tırmanıcı lifler sonrasında yanıt verdi. Müdahaleler bu görevde bir rolü destekledi; insan bilişine etkisi gösterilmedi. - [Uyarlanabilir beyin-bilgisayar arayüzü algoritmaları maymunlarda sinirsel öğrenmeyi şekillendirdi](https://nootropikler.com/tr/news/assistive-algorithms-shape-bci-learning): Uzunlamasına kayıtlar ve bir sinir ağı modeli, uyarlanabilir BBA çözücülerinin pratik sırasında görev bilgisini daha az sinirsel sinyalde yoğunlaştırdığını düşündürüyor; sabit çözücülerde bu görülmedi. - [Büyük bir kohortta sosyal dezavantaj, sürekli daha düşük öznel bellek puanlarıyla ilişkiliydi](https://nootropikler.com/tr/news/social-disadvantage-subjective-memory-longitudinal-cohort): 45 yaş ve üzeri 14.938 Çinli yetişkinin altı veri dalgasında birikimli sosyal dezavantaj sürekli daha düşük öznel bellek puanlarıyla ilişkiliydi; bu puanlar nesnel bilişle zayıf korelasyon gösterdi. - [Felçte tek bir beyin implantı konuşma ve jestleri birlikte çözdü](https://nootropikler.com/tr/news/speech-gesture-paralysis-brain-computer-interface): Üç kişinin katıldığı çalışmada tek bir kortikal implant, konuşma ve jest denemelerini çözdü; bulgular beyin-bilgisayar arayüzüyle daha doğal iletişim için bir kavram kanıtı sunuyor. - [Farelerde örtüşen ventral hipokampus kodları korku anılarının hızlı çağrılmasıyla ilişkiliydi](https://nootropikler.com/tr/news/ventral-hippocampus-overlapping-fear-memory-codes): Farelerde kalsiyum görüntüleme, korku öğreniminin ventral CA1’de tehdit ve nötr bağlam temsillerini birbirine yaklaştırdığını ve çağırma sırasında tehditle ilişkili etkinliğin hızla geri döndüğünü gösterdi. - [Derleme, besinsel kolin ve bilişe ilişkin gözlemsel kanıtları bir araya getirdi](https://nootropikler.com/tr/news/dietary-choline-cognition-observational-evidence-review): Sistematik derleme ve doz-yanıt meta-analizi, besinsel kolin ve biliş sonuçlarına dair gözlemsel çalışmaları değerlendirdi. Kanıt, mevcut çalışmalardaki ilişkilerle ilgilidir; kolin takviyelerinin gerilemeyi önleyip önlemediğini sınamaz. - [Korku öğrenimi fare CA1 nöronlarının farklı bölgelerindeki baskılayıcı sinapsları değiştirdi](https://nootropikler.com/tr/news/ca1-inhibitory-synapses-remodel-with-fear-learning): Boylamsal görüntüleme, izli korku koşullandırmasının hipokampus piramidal nöronlarındaki dendritik baskılayıcı sinapsları yeniden düzenlediğini, akson başlangıç segmentindekileri ise kararlılaştırdığını gösterdi. - [İki yıllık izlemde yürütücü işlev puanları uyku süresinden çok verimlilikle ilişkiliydi](https://nootropikler.com/tr/news/sleep-efficiency-executive-function-repeated-cohort): 55 yaş ve üzeri 233 yetişkinde giyilebilir cihazla ölçülen daha yüksek uyku verimliliği daha iyi yürütücü işlevle ilişkiliydi; uyku süresi ve öznel kalite biliş alanlarıyla anlamlı ilişki göstermedi. - [Üniversite öğrencilerinde gıda güvencesizliği ve stres biliş görevlerindeki farklılıklarla ilişkiliydi](https://nootropikler.com/tr/news/food-insecurity-stress-college-student-cognition): 230 üniversite öğrencisinin kesitsel çalışması, gıda güvencesizliği ve stresi dikkat, karar verme ve bellek eşleştirme görevlerindeki farklılıklarla ilişkilendirdi. Bu ilişkiler, gıdaya erişimin puanlara neden olduğunu gösteremez. - [Egzersiz çalışmaları, çalışma belleği için farklı beyin etkinliği örüntülerine işaret ediyor](https://nootropikler.com/tr/news/exercise-working-memory-fmri-meta-analysis): 11 fMRI çalışmasının aktivasyon olasılığı meta-analizi, egzersiz müdahalelerinden sonra ve uzun süreli egzersiz yapanlarda kısmen farklı aktivasyon değişimleri buldu. Kanıt tabanının küçüklüğü, beyin haritalarını keşifsel kılıyor. - [Meta-analiz ketojenik diyetlerde sınırlı bilişsel sinyaller ve kan yağı artışları buldu](https://nootropikler.com/tr/news/ketogenic-diet-cognitive-impairment-meta-analysis): 12 çalışmalık derleme, bilişsel bozukluğu olan yaşlılarda birleşik biliş sinyallerinin yanında toplam kolesterol ve LDL-C artışı buldu. - [COVID sonrası çalışmada bağırsak mikroplarıyla beyin görüntüleme ölçümleri arasında ilişkiler bildirildi](https://nootropikler.com/tr/news/post-covid-gut-microbiome-brain-imaging-associations): Küçük ve kesitsel bir çalışma, COVID sonrası durumdaki belirtiler ve MR ölçümleriyle bağırsak mikrop örüntülerini ilişkilendirdi. Mikrobiyotanın beyin değişikliklerine veya belirtilere neden olduğunu göstermez. - [Küçük bir bilinç çalışmasında sinire yakın uyarım EEG ölçütü olarak umut verdi](https://nootropikler.com/tr/news/near-nerve-stimulation-consciousness-assessment): Tek merkezli pilot çalışmada, uzamış bilinç bozukluğu olan 19 kişide sinir uyarımı deri uyarımıyla karşılaştırıldı; yazarlar EEG ölçütünün dış merkezlerde doğrulanması gerektiğini belirtiyor. - [İleri yaştaki bir kohortta kalıcı yalnızlık daha kötü sağlıkla ilişkiliydi](https://nootropikler.com/tr/news/loneliness-isolation-trajectories-older-adult-health): 4.090 İngiliz yetişkinin boylamsal analizi, kronik yalnızlığı daha kötü fiziksel ve ruhsal sağlıkla ilişkilendirdi. İzolasyonun sona ermesi daha iyi bilişle ilişkiliydi; ancak gözlemsel veriler neden-sonuç gösteremez. - [Uzun dönemli kohort Alzheimer patolojisi ile bilişsel dayanıklılığı ayrı risk boyutları olarak inceledi](https://nootropikler.com/tr/news/alzheimer-pathology-cognitive-resilience-longitudinal-risk): Ortanca 13,7 yıl izlenen 3.119 yaşlı yetişkinde patoloji ve türetilmiş bilişsel dayanıklılık ölçüsü demans riskiyle bağımsız biçimde ilişkiliydi; gözlemsel analiz nedensellik göstermez. - [Frontal tau, bozulan uyku dalgaları ve daha zayıf bellekle ilişkiliydi](https://nootropikler.com/tr/news/frontal-tau-linked-to-disrupted-sleep-waves-and-memory): Tau PET, EEG ve beyin-omurilik sıvısı belirteçleri kullanılan yaşlı yetişkin gruplarında yüksek frontal tau, daha az yayılan uyku yavaş dalgaları ve daha zayıf gece belleğiyle ilişkiliydi. - [Görev ipuçları belirsizken özellik girişimi karar hatalarıyla ilişkiliydi](https://nootropikler.com/tr/news/feature-interference-cost-of-task-uncertainty): İnsan davranışı, maymun V1 kayıtları ve modelleme; hangi algısal görevin yapılacağına ilişkin belirsizliği, ilgisiz özelliklerin daha güçlü kodlanması ve sinirsel temsillerin daha az ayrışmasıyla ilişkilendirdi. - [Sıcak havada bisiklette susama, dikkat puanlarını etkiledi; yürütücü işlev testini etkilemedi](https://nootropikler.com/tr/news/thirst-satiation-heat-exercise-executive-function): 12 erkekte su ve damar içi serum benzer hidrasyon sağladı; ancak serum alanlar daha susamış ve daha fazla ısı yükü hissetti. Flanker testi ve duygu durumu puanları farklı değildi. - [Koku öğrenimi zebra balıklarında sinirsel temsilleri yeniden düzenledi](https://nootropikler.com/tr/news/odor-learning-reorganizes-brain-representations-in-zebrafish): Genç ve yetişkin zebra balıklarında koku ayırt etme eğitimi, pDp bölgesindeki görevle ilişkili sinirsel örüntüleri ayrıştırdı; bu temsil geometrisi bireysel performansla ilişkiliydi. - [Nadir kortikal baskılayıcı nöronlar farelerde eşzamanlı etkinliği ve uykuyu artırdı](https://nootropikler.com/tr/news/cortical-sst-chodl-neurons-promote-sleep-mice): Sst-Chodl baskılayıcı nöronlarının seçici etkinleştirilmesi farelerde kortikal eşzamanlılığı ve uykuyu artırdı. Eylül'deki dergi yayını, daha önce ön baskı olarak sunulan devre araştırmasını ilerletiyor; insanlarda uyku tedavisi göstermiyor. - [Serbest durabilen mikrometre altı ECoG elektrot tasarımı esnek beyin kayıtlarını hedefliyor](https://nootropikler.com/tr/news/submicron-ecog-electrode-array): Mühendisler yusufçuk kanadından esinlenen ince, serbest durabilen bir elektrokortikografi dizisi bildirdi; tasarım, gelecekteki beyin-bilgisayar arayüzleri açısından önemli bir malzeme sorununu ele alıyor. - [Parkinson’da toplum temelli rehabilitasyon programından sonra bilişsel test puanları iyileşti](https://nootropikler.com/tr/news/parkinsons-pd-core-cognitive-rehabilitation): 45 kişilik önce-sonra çalışmasında yedi oturumluk grup programını genel biliş ve pratik yargılama testlerinde iyileşmeler izledi. Kontrol grubu olmadığı için programın etkisi, test tekrarı veya başka değişimlerden ayrılamaz. - [Çok alanlı sağlık profili üç kohortta bilişsel yaşlanmayla ilişkiliydi](https://nootropikler.com/tr/news/intrinsic-capacity-profile-cognitive-aging-three-cohorts): Üç yaşlanma kohortundaki 26.022 yetişkinde biliş dışı sağlık alanlarındaki bozulmalar daha düşük biliş puanları ve sonraki bilişsel bozulma riskiyle ilişkiliydi. - [Tau ile bağlantılı mitokondri süreci hayvan modellerinde bozuklukları azalttı](https://nootropikler.com/tr/news/nih-tau-mitochondria-reverse-electron-transport): NIH, değişmiş tau ile mitokondride ters elektron akışını ilişkilendiren deneyleri aktardı; yolu engellemek modellerde yarar gösterdi, hastalarda klinik deney yapılmadı. - [Çalışmada uzun şekerlemeler yaşlı yetişkinlerde daha yavaş işlemleme hızıyla ilişkilendirildi](https://nootropikler.com/tr/news/pointer-zzz-napping-apnea-cognition): U.S. POINTER’da 686 yaşlı katılımcının başlangıç analizinde uzun gündüz uykusu daha düşük işlemleme hızıyla ilişkiliydi; nedensellik ve genel apne etkileşimi gösterilmedi. - [Çoklu omik analiz Parkinson için evreyle ilişkili biyobelirteç adayları belirledi](https://nootropikler.com/tr/news/parkinsons-proteo-metabolomic-stage-biomarkers): Parkinson İlerleme Belirteçleri Girişimi verilerinin ikincil analizinde beyin-omurilik sıvısı ve plazma proteinleri ile metabolitleri birleştirilerek aday belirteçler arandı. Makine öğrenimi sonuçları keşif niteliğinde; bağımsız klinik doğrulama gerekiyor. - [UK Biobank kohortu besinsel niasin yoğunluğunu biliş ve demans riskiyle ilişkilendirdi](https://nootropikler.com/tr/news/niacin-diet-density-cognition-dementia-cohort): Geniş nüfus kohortu çalışması, besinsel niasin eşdeğerlerini bilişsel işlev ve yeni demans tanılarıyla ilişkili olarak inceledi; gözlemsel tasarım niasin artırmanın gerilemeyi önlediğini gösteremez. - [Daha belirgin anılar daha isabetli görsel dikkatle ilişkiliydi](https://nootropikler.com/tr/news/distinct-memories-help-focus-on-visual-targets): İnsanlarda fMRI ve göz izlemeli görsel arama görevinde, daha belirgin hipokampal bellek örüntüleri daha isabetli bellek yönlendirmeli göz hareketleri ve daha az rakip etkinliğiyle ilişkiliydi. - [SUPPLX, beyan edilmeyen yohimbin nedeniyle iki ürünü geri çağırdı](https://nootropikler.com/tr/news/fda-recalls-products-undeclared-yohimbine): SUPPLX, testlerde beyan edilmeyen yohimbin bulunmasının ardından Business Pill ve Branch Manager for Men ürünlerini gönüllü geri çağırdı; FDA duyuruyu 4 Eylül’de yayımladı. - [Küçük sham kontrollü Alzheimer çalışmasında beyincik uyarımı sonrası bilişsel iyileşme bildirildi](https://nootropikler.com/tr/news/alzheimer-cerebellar-rtms-fnirs-rct): 33 kişinin katıldığı randomize çalışmada, iki haftalık beyincik rTMS uygulamasından sonra 12. haftaya kadar sham grubuna kıyasla daha iyi genel biliş puanları görüldü. fNIRS değişimleri doğrudan sinir etkinliğini değil, kan akımıyla ilişkili yanıtları ölçüyordu. - [Avrupa araştırması çok uzun uyku ve gündüz kestirmelerini bilişsel bozulmayla ilişkilendirdi](https://nootropikler.com/tr/news/european-sleep-duration-cognition-share-analysis): 88.889 SHARE görüşmesinin kesitsel analizi en az 10 saat uyku ve gündüz kestirmelerini daha düşük bilişle ilişkilendirdi; uyku örüntülerinin bozulmaya neden olup olmadığını gösteremez. - [Yapılandırılmış erken alıştırma farelerde esnek öğrenmeyi biçimlendirdi](https://nootropikler.com/tr/news/structured-practice-shaped-flexible-learning-in-mice): Zamanlama görevi öğrenen farelerde yapılandırılmış erken örnekler, daha esnek sonraki stratejiler ve görevle ilişkili entorinal etkinlikle bağlantılıydı; çalışma sinir ağı modelinin öngörülerini de sınadı. - [Alzheimer biyobelirteçleri Parkinson’da daha hızlı gerileyen bir alt grubu işaretledi](https://nootropikler.com/tr/news/parkinsons-alzheimer-biomarker-cognitive-profiles): İleriye dönük kohortta, biyobelirteç pozitif Parkinson grubundaki 449 kişinin 42’si Alzheimer biyobelirteç ölçütlerini karşıladı ve izlemde daha fazla bilişsel ve motor gerileme gösterdi. Gözlemsel bulgu nedensellik göstermez. - [Glutamat düzeyi fare sinapslarında AMPA reseptör sinyal durumlarını değiştirdi](https://nootropikler.com/tr/news/glutamate-levels-tune-ampa-receptor-conductance): Fare interneuron sinapsları üzerindeki deneyler, daha düşük glutamat maruziyetinin farklı iletkenlik durumlarının kullanımı yoluyla AMPA reseptör özelliklerini değiştirdiğini gösterdi. - [Farelerin iki parietal alanı görsel ve seçim görevlerinde farklı roller gösterdi](https://nootropikler.com/tr/news/mouse-parietal-cortex-functional-architecture): Binlerce fare nöronunun mezoskopik görüntülenmesi, medial parietal AM ve A alanlarının görsel/seçim bilgisini ve seçim geçmişi/duruşu farklı biçimde temsil ettiğini gösterdi. Çalışma işlevsel örgütlenmeyi haritalıyor; davranışlara tek başlarına neden olduklarını kanıtlamıyor. - [İleri yaşta semaglutid farelerde bellek ölçümlerini iyileştirdi; insan etkisi bilinmiyor](https://nootropikler.com/tr/news/nih-semaglutide-late-life-mice-cognition): NIH’nin aktardığı fare çalışmasında ileri yaşta semaglutid uzamsal bellek ölçümlerini iyileştirdi; insanlardaki klinik önemi gösterilmedi. - [Çalışma, majör depresyonda birden çok bağırsak mikrop grubunu ve bilişi haritaladı](https://nootropikler.com/tr/news/multi-kingdom-gut-microbiome-depression-cognition): İlk dönem depresyonu olan 121 genç yetişkin ve 117 kontrolün incelendiği çalışmada bakteri, virüs, mantar ve arke sinyallerinde farklılıklar bulundu. Kesitsel tasarım, mikrobiyota değişimlerinin depresyona veya biliş farklarına neden olduğunu gösteremez. - [Bir beyin görüntüleme yöntemi kortikal sinyal akışının zihinsel durumla değişimini haritaladı](https://nootropikler.com/tr/news/human-cortical-signal-flow-hierarchy-changes-with-state): Doğrulanmış bir etkin bağlantısallık çerçevesi, dışa odaklı işlem sırasında yataylaşan ve içe odaklı durumlarda dikleşen insan korteks hiyerarşisini çıkarsadı. - [Bir yapay zekâ modeli DBS araştırması için derin beyin sinyallerini korteks kayıtlarından yeniden oluşturdu](https://nootropikler.com/tr/news/deep-learning-subcortical-signal-reconstruction-dbs): Hareket bozukluğu olan kişilerin kayıtlarını içeren çok merkezli analiz, üretici bir modelin kapalı döngü uyarım verilerindeki boşlukları gidermek üzere kortikal sinyallerden derin beyin etkinliğini çıkarıp çıkaramayacağını sınadı. - [Gebelikte gıda desteği denemesi fetal beyin yapılarında farklılıklar bildirdi](https://nootropikler.com/tr/news/mikhuna-prenatal-diet-fetal-brain-growth): Ekvador’da 215 gebeliğin katıldığı randomize çalışmada, besin çeşitliliği programı bazı fetal beyin yapılarının büyüme farklılıklarıyla ilişkiliydi; çalışma daha sonraki bilişi değil anatomiyi ölçtü. - [Erken bilişsel bozuklukta probiyotik çalışması biliş ve tau belirteçlerini inceledi](https://nootropikler.com/tr/news/multistrain-probiotics-early-cognitive-impairment): Erken bilişsel bozukluğu olan 87 kişide 24 haftalık randomize çalışma pTau181 düşüşü ve görsel-uzamsal sinyaller buldu; MMSE, sözel bellek veya yürütücü puan farkı yoktu. - [Teta ritimleri uyku sırasında pekişecek anıları işaretleyebilir](https://nootropikler.com/tr/news/theta-rhythms-may-mark-memories-for-sleep-consolidation): 31 genç yetişkinde kelime–nesne öğrenimi sırasındaki EEG, daha güçlü teta etkinliğini şekerleme sonrası uyku dalgası eşleşmesi ve bellek kalıcılığıyla ilişkilendirdi; ilişki nedensellik göstermez. - [Bir anının nasıl hatırlandığı sonraki beyin etkinliğinde iz bıraktı](https://nootropikler.com/tr/news/recalling-a-memory-leaves-a-trace-in-brain-activity): Bir fMRI bellek deneyinde, hatırlama ipuçları öğrenilmiş görsel–sözcük çiftlerinin sonraki sinirsel örüntülerini etkiledi; katılımcıların bellek testi performansı benzerdi. - [FDA, enjekte edilebilir karışımlarda takviye sınıfı glutatyon kullanımına karşı uyardı](https://nootropikler.com/tr/news/fda-glutathione-injection-quality-alert): FDA, hazırlanmış damar içi glutatyon sonrası en az 30 hastada istenmeyen olay bildirdi; takviye sınıfı malzemenin enjeksiyonda kullanılmaması gerektiğini hatırlattı. - [Koşu bandı eğitimine eklenen omurilik uyarımının Parkinson’da yürüme etkisi sınırlıydı](https://nootropikler.com/tr/news/parkinson-spinal-magnetic-stimulation-treadmill-trial): Parkinson hastalığı olan 70 kişinin randomize çalışmasında uyarım ve koşu bandı eğitimiyle kısa süreli yürüme hızı ve daha sonra donma sinyali görüldü; genel üstünlük kalıcı olmadı. - [Glutamin kısa süreli benzetilmiş yüksek irtifa maruziyetinde duygu durumu veya bilişi değiştirmedi](https://nootropikler.com/tr/news/glutamine-hypoxia-cognition-rct): Genç erkeklerde randomize çalışma, 4.500 m’ye eşdeğer altı saatlik benzetilmiş hipoksinin psikobiyolojik ölçümleri değiştirmediğini ve glutaminin saptanabilir yarar sağlamadığını bildirdi. - [NIH, yaşlanma ve Alzheimer’da DNA katlanma farklarını bildirdi](https://nootropikler.com/tr/news/nih-dna-organization-alzheimers-aging): NIH’nin Ağustos haberi, Alzheimer’lı bağışçıların ölüm sonrası prefrontal hücrelerinde DNA temasları ve gen etkinliği farklılıklarını ele aldı; nedensellik gösterilmedi. - [Yer fıstığı çalışması biliş veya beyin etkinliğinde anlamlı yarar bulmadı](https://nootropikler.com/tr/news/peanut-consumption-memory-complaints-rct): Bellek yakınması olan 27 yaşlı yetişkinin 12 haftalık yer fıstığı çalışmasında biliş, beyin etkinliği veya düzeltilmiş biyobelirteçlerde anlamlı grup farkı bulunmadı. - [Farelerde uyanıklığa yanıt veren nöronlar uyku baskısını düzenledi](https://nootropikler.com/tr/news/wake-history-neurons-regulate-sleep-drive-in-mice): Farelerde uyanıklığa yanıt veren nöronlara müdahale NREM uykusunu ve uyku baskısını değiştirdi; bulgular uyku düzenleyici devreleri belirler, az uykunun güvenli olduğunu göstermez. - [Uzun süre yaşayan beyin organoidleri insan gelişiminin ileri evre özelliklerini gösterdi](https://nootropikler.com/tr/news/nih-brain-organoids-long-term-maturation): NIH, kök hücrelerden üretilen beyin organoidlerinin yaklaşık altı yıl boyunca olgunlaştığını ve moleküler yaşın geçen zamanla ilerlediğini bildirdi; bunlar laboratuvar modelleridir. - [Fare beyni bilişsel işlemlerde sinirsel bileşenleri yeniden kullandı](https://nootropikler.com/tr/news/reusable-modular-cognition-mouse-brain): Gecikmeli eşleştirme görevinde fareler uyaran işleme ve belleği sürdürme için prefrontal ve parietal sinir alt uzaylarını yeniden kullandı. Veriye dayalı ağ modelleri modüler açıklamayı destekledi; bulgu tek göreve özgü ve insan bilişsel modüllerini kanıtlamıyor. - [Ara MCI analizinde Akdeniz diyeti metabolik belirteçleri değiştirdi](https://nootropikler.com/tr/news/mediterranean-diet-metabolomics-mci-interim): Hafif bilişsel bozukluğu olan 47 yaşlı yetişkinde 24 haftalık Akdeniz diyeti müdahalesi bazı plazma metabolitlerini değiştirdi; bazı değişimler biliş puanlarıyla ilişkiliydi. İlişki bilişsel yararı kanıtlamaz. - [FDA, mevcut kratom ithalat uyarısına Ağustos tedarikçi kaydı ekledi](https://nootropikler.com/tr/news/fda-adds-kratom-supplements-to-import-detention-alert): FDA İthalat Uyarısı 54-15’in 17 Ağustos sürümü yeni bir tedarikçi kaydı içeriyor; kratom için alıkoyma mekanizması 2026’dan eskidir ve belirli ithalatı kapsar. - [Protein açısından zengin Akdeniz diyeti çalışması mütevazı biliş puanı farkları bildirdi](https://nootropikler.com/tr/news/promed-protein-mediterranean-exercise-cognition): Yetersiz beslenme ve bilişsel gerileme riski taşıyan 105 yaşlı yetişkinin altı aylık çalışmasında, diyet danışmanlığı gruplarında broşür kontrolüne kıyasla beslenme durumu ve nörobiliş puanları iyileşti. - [Prebiyotik lifli ekmek çalışması yaşlılarda uygulanabilirlik ve bilişi inceledi](https://nootropikler.com/tr/news/prebiotic-fibre-bread-older-adults-feasibility): Uygulanabilirlik çalışması, olağan lif alımı düşük yaşlılarda günde ek 10 g prebiyotik lif sağlayan ekmeği sınadı; biliş ve diğer sonuçlar ön bulgu olarak değerlendirildi. - [Farelerde yapay kış uykusu sırasında bellek izleri korundu](https://nootropikler.com/tr/news/memory-traces-persist-after-artificial-hibernation-in-mice): Farelerde yapay kış uykusundan sonra hipokampal sinapsların yarıdan fazlası kaybolsa da seçilmiş anılar korundu; bellekle ilişkili kümelenmiş bağlantılar daha çok korundu. - [TIMP2 farelerde yaşla ilişkili mikroglia durumlarını değiştirdi](https://nootropikler.com/tr/news/timp2-microglia-aging-mouse-brain): Farelerde TIMP2 silinmesi yaşla ilişkili bazı mikroglia ölçütlerini kötüleştirirken yaşlı farelerde uygulama inflamasyon örüntülerini ve fagositozu değiştirdi. Bu klinik öncesi bulgular bilişsel yarar veya güvenli insan müdahalesi göstermez. - [Wisconsin duyurusu, Alzheimer ile ilişkili değişikliklerle bağlantılı bağırsak metabolitini ele aldı](https://nootropikler.com/tr/news/gut-imidazole-propionate-alzheimer-announcement): Wisconsin-Madison Üniversitesi duyurusu, insanlarda bilişle ve deneysel modellerde Alzheimer benzeri değişikliklerle ilişkili bir bağırsak bakterisi metabolitini aktardı; makalenin kendisi 26 Haziran’da yayımlandı. - [Küçük bir çalışma deniz tarağı kaynaklı plazmalojenleri daha yüksek sözel bellek puanlarıyla ilişkilendirdi](https://nootropikler.com/tr/news/scallop-plasmalogens-verbal-memory-rct): Seçilmiş 68 Japon yetişkinde 12 haftalık çalışma deniz tarağı kaynaklı plazmalojenlerle sözel bellek sinyali bildirdi; uzun dönem etkiler bilinmiyor. - [On iki haftalık kreatin çalışması güç artışlarının yanında keşifsel bilişsel belirteçler bildirdi](https://nootropikler.com/tr/news/creatine-cognition-middle-aged-older-adults-rct): 12 haftalık kreatin çalışmasında 64 tamamlayıcının biliş bulguları keşifsel olarak tanımlandı; egzersiz ve diyet programına katılım kişisel tercihle seçildi. - [Endokannabinoid plastisitesi farelerde tek deneyimle öğrenmeyi destekledi](https://nootropikler.com/tr/news/striatal-endocannabinoids-one-shot-learning-mice): Farelerde yapışkan bantla tek ve kısa temas sonraki kaçınmayı ve kortikostriatal plastisiteyi tetikledi; endokannabinoid yolunun bozulması öğrenmeyi aksattı. Yeni kaçınma görevi bir hayvan modelidir, insan belleğini geliştirme kanıtı değildir. - [Pilot meditasyon ve nefes çalışması Parkinson’da kaygıyı azalttı](https://nootropikler.com/tr/news/parkinson-meditation-breathwork-anxiety-pilot-trial): Küçük randomize pilotta altı haftalık uzaktan meditasyon ve nefes egzersizi Parkinson’la ilişkili kaygıyı bekleme listesine göre azalttı; çalışma bilişe değil kaygıya odaklandı. - [İnsan beyin dokusu çalışması, değişmiş glikoz depolanmasını Alzheimer patolojisiyle ilişkilendirdi](https://nootropikler.com/tr/news/brain-glucose-glycogen-alzheimer-human-brains): Ölüm sonrası 230 beynin incelendiği çalışma, glikojenle ilişkili yapıları Alzheimer tau patolojisiyle ilişkilendirdi; erken patolojik evrelerde de değişiklikler görüldü. Doku incelemesi hangi değişimin önce geldiğini veya diyet değiştirmenin yararını gösteremez. - [Küçük REM davranış bozukluğu çalışmasında dijital bilişsel eğitim yürütücü işlev puanlarını artırdı](https://nootropikler.com/tr/news/cogtrail-rbd-cognitive-training-executive-function): İzole REM uyku davranış bozukluğu olan 82 kişide beş haftalık dijital bilişsel eğitim ve yaşam tarzı rehberliği, bekleme listesine kıyasla ölçülü yürütücü işlev kazanımlarıyla ilişkiliydi. - [Holografik mikroskop beyin bölgeleri arasındaki iletişimi sınadı](https://nootropikler.com/tr/news/two-photon-holographic-mesoscope-neural-circuits): Yeni iki-foton sistemi farelerde milimetre ölçeğinde seçili nöronları uyarırken aşağı akım yanıtlarını görüntüledi. Bölgeler arası devre deneylerine olanak sağlıyor; özel bir araştırma aracı ve insan uygulaması değil. - [İleri Parkinson tedavisi sonrası rehabilitasyonda olası bir bilişsel sinyal görüldü](https://nootropikler.com/tr/news/parkinson-device-aided-therapy-rehabilitation-cognition): Cihaz destekli Parkinson tedavisine başlayan 54 kişinin açık randomize çalışmasında kişiye uyarlanmış rehabilitasyon bir yılda daha iyi bilişsel performansla ilişkiliydi; ikincil bulgunun doğrulanması gerekiyor. - [Kafein eşleştirmeli çalışma enerji içeceği formülüne ek dikkat yararı bulmadı](https://nootropikler.com/tr/news/caffeine-matched-energy-drink-attention-trial): 116 yetişkinde enerji içeceği, tek akut test oturumunda 200 mg kafein içeren eşleştirilmiş kontrol içeceğinden dikkat veya bellekte üstün değildi. - [Alzheimer modeli beyinlerde mitokondri plakları tanımlandı](https://nootropikler.com/tr/news/mitochondrial-plaques-alzheimers-neuronal-processes): Alzheimer modeli farelerde ve ölüm sonrası insan dokusunda, nöron uzantılarında bozulmuş lizozomal temizlenmeyle birlikte mitokondri birikimleri tanımlandı. Bulgular patolojiyi tarif ediyor; tedavi veya bilişsel etki göstermiyor. - [Makaklarda bellek toplulukları öğrenmenin üzerinden geçen süreye göre farklılaştı](https://nootropikler.com/tr/news/macaque-experience-reorganizes-memory-traces): Makak kayıtları, yeni, yakın ve daha eski öğrenilmiş dizilerin uykuda farklı biçimde yeniden etkinleştiğini; eski anıların daha kararlı ve bağlantılı topluluklar oluşturduğunu gösterdi. Kesitsel çalışma tek tek hücrelerin zaman içindeki değişimini izleyemiyor. - [Dört haftalık 16:8 yeme penceresi çalışması ek bilişsel etki bulmadı](https://nootropikler.com/tr/news/time-restricted-eating-working-memory-women): 43 sağlıklı kadında çalışma belleği ve dikkat her iki grupta zamanla iyileşti; 16:8 zaman kısıtlı beslenme, olağan beslenmeye göre anlamlı bilişsel üstünlük sağlamadı. - [Küçük GeNeurofil pilotu hafif bilişsel bozuklukta test ve belirteç değişimleri bildirdi](https://nootropikler.com/tr/news/geneurofil-mci-pilot-trial): Hafif-orta bilişsel bozukluğu olan 54 kişinin altı aylık pilotunda GeNeurofil daha iyi test puanları ve daha düşük plazma belirteçleriyle ilişkiliydi; yazarlar daha büyük doğrulama çalışmaları gerektiğini belirtiyor. - [Küçük Alzheimer çalışması bitki ağırlıklı ketojenik diyet ile oruç düzenini birlikte sınadı](https://nootropikler.com/tr/news/plant-rich-ketogenic-fasting-alzheimer-trial): Standart Alzheimer bakımı alan 60 kişinin altı aylık değerlendirici-kör çalışmasında, birleşik müdahale grubunun ortalama MMSE puanı artarken kontrol puanı düştü. Tasarım diyetin etkisini oruçtan ayıramaz. - [Yapay zekâ destekli beslenme çalışması yetersiz beslenen bakım evi sakinlerinde bilişsel değişimler bildirdi](https://nootropikler.com/tr/news/ai-guided-nutrition-long-term-care-cognition): Uzun süreli bakım alan 108 kişilik aşamalı çalışmada, kişiye göre düzenlenen beslenme desteğinden sonra beslenme ve biliş ölçümleri en çok ağır yetersiz beslenen grupta iyileşti. Tasarım, değişimlere yapay zekânın neden olduğunu gösteremez. - [Farelerde beceri anılarının yeniden etkinleşmesi hipokampustan bağımsız sürdü](https://nootropikler.com/tr/news/procedural-memory-replay-independent-hippocampus): Eğitilmiş farelerde uyku sırasında işlemsel deneyimle ilişkili dorsal striatum etkinlik dizileri hipokampus lezyonlarından sonra da yeniden etkinleşti. Bu etkinlik sonraki görev gelişimini öngördü; nedensel rolü için doğrudan bozma deneyleri gerekiyor. - [Takviye incelemesi Alzheimer ve hafif bilişsel bozukluk çalışmalarında karışık sonuçlar buldu](https://nootropikler.com/tr/news/supplements-mci-alzheimer-network-review-2026): 29 çalışmalık ağ derlemesi Alzheimer ve hafif bilişsel bozuklukta testlere göre değişen sonuçlar buldu; hiçbir takviye ADAS-Cog puanını anlamlı biçimde iyileştirmedi. - [İnsan hipokampusundaki bağışıklık hücreleri orta yaşta değişiyor](https://nootropikler.com/tr/news/human-hippocampus-immune-cells-shift-in-midlife): 20–95 yaşlarındaki 40 yetişkinin ölüm sonrası hipokampus dokusunda, orta yaşta bağışıklık hücresi dağılımı değişti: yerleşik mikroglialar azalırken iltihap özellikleri taşıyan, kan hücrelerine benzeyen hücreler arttı. - [Tarihsel şeker kısıtlaması ileri yaş beyin ve ruh sağlığı sonuçlarıyla ilişkilendirildi](https://nootropikler.com/tr/news/early-life-sugar-rationing-brain-aging): Doğal deney çalışması, erken yaşamında şeker kısıtlamasına maruz kalan yetişkinleri daha sonra doğan kuşaklarla karşılaştırdı ve ileri yaş beyin yaşlanmasıyla sağlık sonuçlarında ilişkiler buldu; tarihsel tasarım beslenme nedenini kanıtlayamaz. - [Çevrim içi çalışma uzun COVID ile daha düşük çalışma belleği puanlarını ilişkilendirdi](https://nootropikler.com/tr/news/long-covid-linked-to-lower-working-memory-scores): 1.064 kişinin katıldığı kesitsel çevrim içi çalışmada, bildirilen uzun COVID kısa görsel çalışma belleği testinde daha düşük puanlarla ilişkiliydi; tek görev genel bir bozukluğu teşhis edemez. - [FDA, MOGO moringa kapsülleriyle bağlantılı Salmonella salgını soruşturmasını kapattı](https://nootropikler.com/tr/news/fda-closes-moringa-salmonella-outbreak-investigation): FDA’nın 17 Temmuz kapanış raporu, belirli MOGO moringa kapsülü lotlarıyla bağlantılı 34 hastalık ve 11 hastaneye yatış bildirdi; eski ürünler evlerde bulunabilir. - [Zaman sınırlı ipuçlu hatırlama, tekrarlı testlerde bellek kazanımını artırdı](https://nootropikler.com/tr/news/cued-recall-format-increases-repeated-memory-retrieval): Dört deneyde kısıtlı ilk-harf ipuçları tekrarlı hatırlamada serbest hatırlamadan daha büyük kazanım sağladı; katılımcılar istedikleri sırayla yanıt verdiğinde üstünlük kayboldu. - [Hipokampus dendritleri öğrenme sinyallerini bağımsız işliyor](https://nootropikler.com/tr/news/hippocampal-dendrites-process-learning-signals): Sanal ortamda yol alan farelerde voltaj görüntüleme, yeni ortamda bazı hipokampal CA3 dendrit sinyallerinin hücre gövdesinden önce değiştiğini gösterdi; bu yerel işlemeyi destekler, bellek yararını kanıtlamaz. - [Kandaki p-tau217 düzeyleri yaşlılarda sonraki bilişsel bozulma riskiyle ilişkiliydi](https://nootropikler.com/tr/news/blood-ptau217-predicts-risk-of-cognitive-impairment): Başlangıçta bilişsel olarak sağlıklı 2.684 yetişkinin gözlemsel verileri, yüksek kan p-tau217 düzeylerini daha yüksek sonraki bozulma riskiyle ilişkilendirdi; en yüksek grup için 10 yıllık tahminler daha belirsizdi. - [LatAm-FINGERS çalışması bilişsel gerileme riski için çok bileşenli programı sınadı](https://nootropikler.com/tr/news/latam-fingers-lifestyle-cognition-trial): Latin Amerika’daki geniş randomize çalışma, risk altındaki yaşlılarda egzersiz, beslenme, bilişsel eğitim ve damar riski yönetimini sınadı; müdahale birincil biliş ölçütünde mütevazı üstünlük sağladı. - [Alzheimer çalışmasında ceperognastat klinik ilerlemeyi yavaşlatmadı](https://nootropikler.com/tr/news/ceperognastat-alzheimers-phase2-trial-no-clinical-benefit): 327 kişilik faz 2 çalışmada ceperognastat, erken semptomatik Alzheimer hastalığının 100 haftadaki ilerlemesini anlamlı ölçüde yavaşlatmadı; yüksek dozda modele dayalı ilerleme plasebodan hızlıydı. - [ABD kurumları konsantre 7-OH ürünlerini takvime alma sürecini başlattı](https://nootropikler.com/tr/news/dea-begins-7-oh-scheduling-process): FDA’nın 13 Temmuz güncellemesi, yoğunlaştırılmış 7-OH ve sentetik türevler için geçici kontrol sürecini anlattı; teklif ile nihai karar ayrı aşamalardır. - [Şekerleme sırasındaki rastgele sesler yavaş dalgaları ve hatırlamayı bozdu](https://nootropikler.com/tr/news/random-sleep-audio-disrupted-slow-waves-and-recall): 20 sağlıklı erkeğin iki oturumlu şekerleme çalışmasında rastgele sesler yavaş dalga uykusunu azalttı ve görsel-şekil eşleşmelerini hatırlamayı bozdu; sözel ve işlemsel bellek etkilenmedi. Makale 25 Haziran’da, Freiburg duyurusu 9 Temmuz’da yayımlandı. - [İki MR belirteci erken MS’te bilişsel ilerlemeyle ilişkiliydi](https://nootropikler.com/tr/news/multiple-sclerosis-mri-markers-cognitive-progression): Erken yineleyici-düzelen multipl sklerozlu 87 kişide tanı anındaki MR belirteçleri, nükslerden veya MR etkinliğinden bağımsız sonraki bilişsel gerilemeyle ilişkiliydi. - [Bölgesel beyin yaşı örüntüsü kandaki tau belirteciyle bilişi ilişkilendirdi](https://nootropikler.com/tr/news/regional-brain-age-pattern-links-tau-marker-and-cognition): 71 yaşlı yetişkinin kesitsel analizinde, p-tau217 ile biliş arasında tek bir MR beyin yaşı örüntüsü üzerinden dolaylı ilişki bulundu; doğrudan ve toplam ilişkiler anlamlı değildi. - [Uyku sırasındaki gürültü sıçanlarda hipokampal bellek sinyallerini bozdu](https://nootropikler.com/tr/news/sleep-noise-interrupts-hippocampal-memory-consolidation-in-rats): Uyuyan sıçanlarda hipokampal keskin dalga-dalgalanmalarına zamanlanan kısa sesler dalga etkinliğini azalttı ve bir bellek görevinde kalıcılığı bozdu; etki göreve göre değişti. - [Etiyopyalı ergen kızlarda zenginleştirilmiş mısır unu biliş puanlarını artırmadı](https://nootropikler.com/tr/news/vitamin-fortified-corn-flour-teen-cognition-ethiopia): 472 kızın katıldığı altı aylık çalışma, folat ve B12 ile zenginleştirilmiş mısır ununun bilişte anlamlı yararını bulmadı; bodurluk durumuna göre ikincil dil testi farkı görüldü. - [Avustralya kohortunda yüksek ultra işlenmiş gıda tüketimi daha düşük dikkat puanlarıyla ilişkilendirildi](https://nootropikler.com/tr/news/ultra-processed-foods-attention-apoe4): 2.192 Avustralyalı yetişkinin kesitsel analizinde ultra işlenmiş gıda payı daha düşük dikkat puanıyla ilişkiliydi; bellek için açık ilişki bulunmadı ve nedensellik gösterilemedi. - [FDA, bir yeşil çay satıcısının Alzheimer ve anksiyete iddialarına itiraz etti](https://nootropikler.com/tr/news/fda-warns-green-tea-seller-over-disease-treatment-claims): FDA’nın 2 Temmuz mektubu, yeşil çay için Alzheimer, Parkinson ve kaygı iddialarına itiraz etti; konu yeni bir etkinlik deneyi değil, pazarlama ve ilaç onayıdır. - [Hipoglisemide MCT kaynaklı ketonlar alternatif beyin yakıtı olarak incelendi](https://nootropikler.com/tr/news/mct-ketones-hypoglycemia-working-memory-t1d): Küçük bir insan çalışmasında dört haftalık MCT diyeti, tip 1 diyabette uyarılmış hipoglisemi sırasında daha iyi çalışma belleği doğruluğuyla ilişkiliydi; tepki süresi iyileşmedi. - [Hipokampal teta dizileri sıçanlarda hatırlanan hedefleri izledi](https://nootropikler.com/tr/news/goal-directed-hippocampal-theta-navigation): Açık alanda yol bulan sıçanlarda öğrenmeye bağlı hipokampal teta dizileri hatırlanan hedeflere giden rotaları öngördü ve prefrontal etkinlikle eşleşti. Bulgular olası bir planlama devresini gösteriyor; dizilerin yön bulmaya neden olduğunu kanıtlamıyor. - [Kohortta orta yaş Alzheimer kan belirteçleri bilişsel test puanlarıyla ilişkili bulundu](https://nootropikler.com/tr/news/nih-midlife-alzheimer-biomarkers-cognition): NIH’nin Temmuz haberi, CARDIA kohortunda kandaki amiloid ve tau belirteçleri ile orta yaştaki bilişsel farklılıkları ilişkilendiren gözlemsel çalışmayı ele aldı. ## Nootropik News — العربية - [ارتبطت تغيرات المزاج والأفكار المتطفلة بتذكر الأفعال المخطط لها](https://nootropikler.com/ar/news/affective-changes-intrusive-thoughts-prospective-memory): اختبرت الدراسة 120 بالغًا أصغر وأكبر سنًا؛ دخل 117 منهم تحليلات الذاكرة المستقبلية. ارتبطت تغيرات المزاج والأفكار المتطفلة بتذكر الأفعال المقصودة، لكن النتائج لا تثبت آلية سببية أو علاجًا لمشكلات الذاكرة. - [تفتتح Nature Neuroscience عددًا خاصًا عن التقنية العصبية وواجهات الدماغ والحاسوب](https://nootropikler.com/ar/news/neurotechnology-special-issue-editorial-october-2026): تقدم افتتاحية منشورة في 1 أكتوبر عددًا خاصًا عن صلات التقنية العصبية بأبحاث الدماغ والأجهزة المساعدة وحوكمة البيانات؛ وهي نظرة تحريرية وليست تجربة جديدة. - [أنماط اتصال الدماغ المرتبطة بألزهايمر تختلف عن أنماط الشيخوخة](https://nootropikler.com/ar/news/alzheimer-connectivity-gradients-aging-biofinder-adni): ربطت تحليلات التصوير بالرنين المغناطيسي في مجموعتي BioFINDER-2 وADNI بين التغيرات المرضية المرتبطة بألزهايمر والعمر ومحاور مختلفة لاتصال القشرة الدماغية. تصف نتائج المجموعات ارتباطات، ولا تثبت اختبارًا تشخيصيًا أو آلية سببية. - [تجربة صغيرة لمزيج الكشمش الأسود ترصد تغيرات محددة في انتباه كبار السن](https://nootropikler.com/ar/news/blackcurrant-theanine-pine-bark-attention-crossover): حللت تجربة تبادلية 26 بالغًا أكبر سنًا بعد فترات من أربعة أسابيع لمزيج الكشمش الأسود وL-theanine ولحاء الصنوبر أو دواء وهمي. انخفضت الإنذارات الكاذبة، لكن نتائج الذاكرة والإجهاد لم تبق دالة بعد تصحيح الاختبارات المتعددة؛ ولا يفصل المزيج أثر كل مكون. - [نموذج تعلم آلي تنبأ بضعف إدراكي مستقبلي لدى المصابين بباركنسون](https://nootropikler.com/ar/news/parkinsons-tabpfn-cognitive-impairment-prediction): أفادت دراسة استعادية بأن قيمة AUC لنموذج TabPFN بلغت 0.822 في التحقق الداخلي و0.742 في مجموعة مستقلة. ويشير الباحثون إلى ضرورة التحقق الاستباقي متعدد المراكز قبل الاستخدام السريري. - [حملت مجموعات عصبونات الحُصين البشري معلومات عن معاني الكلمات](https://nootropikler.com/ar/news/human-hippocampus-distributed-semantic-code): ربطت تسجيلات أثناء الاستماع إلى سرد أنماط النشاط الموزعة في الحُصين بدلالات الكلمات، حتى بعد مراعاة الصوتيات والقواعد في التحليل. - [تجربة قصيرة للهيل الأسود تشير إلى تحسن في اختبارات الانتباه مع تمويل من الشركة](https://nootropikler.com/ar/news/black-cardamom-extract-short-attention-trial): وزعت تجربة مدتها 14 يومًا 96 بالغًا على مستخلص الهيل الأسود أو الكافيين أو مزيجهما أو دواء وهمي؛ شمل التحليل النهائي 85 مشاركًا. تحتاج النتائج إلى تكرار مستقل ولا تثبت فائدة معرفية دائمة. - [رسمت تسجيلات الدماغ إشارات مشتركة ومتميزة للكلام المتخيّل والمنطوق](https://nootropikler.com/ar/news/imagined-speech-neural-architecture-ecog): كشفت تسجيلات عالية الكثافة أثناء جراحة اليقظة عن إشارات تخطيط مشتركة وأنماط حسية حركية مختلفة للمقاطع المتخيلة والمنطوقة، وقد تفيد النتيجة واجهات الكلام المستقبلية. - [ساعد تطابق ظروف الكمامة على التعرف في تجربة واحدة من تجربتي ذاكرة الوجوه](https://nootropikler.com/ar/news/masked-face-recognition-context-congruency): وجدت تجربتان استخدمتا صورًا واقعية منخفضة الدقة فائدة للتطابق عندما جرى ترميز الوجوه المقنعة في التجربة الأولى، لكن ليس الثانية. وكان مستوى الدقة متواضعًا عمومًا. - [دراسة على الفئران تربط مسار الإندول البكتيري المعوي بإصابة السكتة والاستجابة المناعية](https://nootropikler.com/ar/news/gut-microbiota-indole-stroke-severity-immune-response): وجدت تجارب الفئران أن إشارات الإندول البكتيري أثرت في النشاط المناعي وإصابة الدماغ بعد السكتة. وأظهرت مجموعة بشرية من مرضى السكتة ارتباط وفرة الجين البكتيري tnaA بنتائج أسوأ، لكن الآلية لم تثبت لدى البشر. - [ارتبط التخدير ببصمة مشتركة لديناميات الأعصاب عبر ستة أنواع](https://nootropikler.com/ar/news/cross-species-neural-dynamics-under-anesthesia): وجد تحليل لتسجيلات دماغية عبر الأنواع مقاييس زمنية عصبية محلية أقصر وتزامنًا أضعف بين المناطق أثناء التخدير؛ وعكس التحفيز المهادي النمط لدى قرود المكاك. - [ارتبطت مشاهدة التلفاز واستخدام الحاسوب بعلاقتين متعاكستين مع الإدراك لدى كبار السن](https://nootropikler.com/ar/news/screen-time-types-and-cognition-older-adults): في أربع مجموعات شيخوخة، ارتبطت مشاهدة التلفاز الأطول بدرجات معرفية أقل، بينما ارتبط استخدام الحاسوب بدرجات أعلى. وقدمت تحليلات التوزيع العشوائي المندلي أدلة داعمة لكنها تعتمد على افتراضات. - [جهاز تحفيز لاسلكي يعمل بالطاقة الراديوية دون بطارية عمل لدى فئران تتحرك بحرية](https://nootropikler.com/ar/news/wireless-rf-neurostimulation-freely-moving-mice): اختبرت دراسة حيوانية وهندسية جهاز تحفيز عبر الجمجمة يعمل لاسلكيًا بالطاقة الراديوية؛ حافظ على خرجه عبر القفص وأحدث حركة دائرية عند استهداف منطقة حركية. - [قلل عدم اليقين البيئي جهد التخطيط لدى البشر](https://nootropikler.com/ar/news/environmental-stochasticity-reduces-human-planning-effort): عبر ثلاثة أشكال من عدم اليقين البيئي، خطط المشاركون بجهد أقل واستجابوا أسرع واستخدموا سياسات قرار أبسط وأقل حساسية لقيم الخيارات. - [لم تجد الدراسة فروقًا معرفية قابلة للكشف مرتبطة بـ APOE ε4 لدى الشباب الأصحاء](https://nootropikler.com/ar/news/apoe4-young-adult-cognition-navigation-null): بين 1,000 من البالغين الأصحاء بعمر 18–35 عامًا، لم يختلف حاملو ε3ε4 بشكل قابل للكشف عن حاملي ε3ε3 في الملاحة أو عدة مهام معرفية. وتنطبق النتيجة على هذه العينة والفئة العمرية. - [طبقات قشرة دماغ الفئران تمايزت أثناء تعلم مهمة الشوارب.](https://nootropikler.com/ar/news/cortex-wide-laminar-dynamics-learning-mice): أثناء تعلم الذكور من الفئران المهمة المعتمدة على الشوارب، وجد تصوير المساحات الواسعة على 25 منطقة قشرية تغييرات مختلفة، وأحيانًا متعاكسة في نشاط طبقات 2/3 و5. ترسم الدراسة ديناميكيات التعلم؛ لكنها لا تفصل جميع المساهمات السببية. - [دراسة عن ضعف الإدراك الوعائي تربط ميكروبات الأمعاء وحمض الإندول-3-لاكتيك](https://nootropikler.com/ar/news/gut-ila-axis-vascular-cognitive-impairment): ربطت مجموعة سريرية وتجارب على الفئران استقلاب الميكروبات للتريبتوفان بالإدراك ووظيفة التصريف الغليمفاوي. كانت الملاحظات السريرية استكشافية، أما أدلة التدخل فجاءت من الفئران. - [أثّر مسار اللوزة الدماغية–المخطط الظهري الوحشي في السلوك التكراري لدى الفئران.](https://nootropikler.com/ar/news/amygdala-striatum-circuit-repetitive-behavior-mice): أظهرت دراسة على الفئران اتصالًا مباشرًا بين اللوزة الدماغية والسترياتوم الظهري الوحشي يؤثر على التمشيط المحفَز بالمثيرات ويقوى في نموذج التمشيط القسري. هذه نتيجة من دائرة حيوانية؛ وليست دليلًا على السبب أو العلاج لدى البشر. - [أتاحت خزعات الدماغ الحي فحصًا مباشرًا لمرضيات ألزهايمر](https://nootropikler.com/ar/news/alzheimer-pathology-living-brain-biopsy-proteomics): لدى 18 شخصًا خضعوا لجراحة تحويلة بسبب الاشتباه باستسقاء الرأس سوي الضغط، وُجدت لويحات أميلويد في تسع خزعات؛ وفحص الباحثون كيمياء اللويحات ودوران تاو. وتحد طبيعة العينة الجراحية المنتقاة من تعميم النتائج. - [عدّلت قرود المكاك الريسوسي سرعة القرار بطريقة ارتبطت بالدقة](https://nootropikler.com/ar/news/macaques-metacognitive-control-decision-accuracy): في مهمة اختيار بين بديلين، كانت قرود المكاك الريسوسي أدق في الاستجابات الأسرع حتى بعد احتساب الصعوبة. وقد يفسر نموذج للمراقبة هذا النمط، لكنه لا يثبت الثقة الذاتية مباشرة. - [تحليل مؤشرات COSMOS لم يجد أثرًا لمدة عامين للفيتامينات المتعددة أو مستخلص الكاكاو](https://nootropikler.com/ar/news/cosmos-multivitamin-cocoa-neurodegeneration-biomarkers): في دراسة فرعية عشوائية لدى بالغين أكبر سنًا، لم يغير الفيتامين المتعدد ولا مستخلص الكاكاو ثلاثة مؤشرات دموية خلال عامين مقارنة بالدواء الوهمي. ولا تحسم هذه النتائج ما إذا كانت المكملات تؤثر في الإدراك عبر مسارات أخرى. - [قام أطلس مدعوم من NIH برسم خريطة نشاط الخلايا في أمراض الدماغ](https://nootropikler.com/ar/news/nih-single-cell-atlas-brain-disorders): أعلن NIH عن الخرائط الجزيئية التي تم إنشاؤها بواسطة أكثر من 6.3 مليون نواة خلية من 1,494 متبرعًا؛ وتعد هذه البيانات مصدرًا للبحث في مرض الزهايمر والأمراض الدماغية المرتبطة. - [تحفيز موجّه إلى الجسم المخطط غيّر خيارات الجهد الذهني في دراسة بشرية](https://nootropikler.com/ar/news/temporal-interference-stimulation-mental-effort): في تجربة صغيرة على بالغين أصحاء، غيّر التحفيز بالتداخل الزمني طريقة موازنة المشاركين بين المكافآت والجهد المعرفي، مع تغيرات في إشارات الجسم المخطط والتلفيف الحزامي. - [لم يتضح أن تقديرات الانتباه البصري قابلة للتبادل بين مهمتين](https://nootropikler.com/ar/news/visual-attention-estimates-depend-on-task): أكمل 30 مشاركًا مهمتين للانتباه البصري. بلغ متوسط التقديرات 58 هرتز في إحداهما و49 في الأخرى، لكن التحليلات لم تثبت بوضوح وجود فرق أو تكافؤ. - [في دراسة صغيرة على ضعف إدراكي خفيف، زاد النظام الغذائي على نمط MIND القائم على وجبات من الدرجات المعرفية](https://nootropikler.com/ar/news/mind-based-diet-mci-cluster-rct-korea): في دراسة كورية لمدة 12 أسبوعًا على 80 بالغًا يعانون من ضعف إدراكي خفيف، ارتفعت درجات اختبار K-MMSE2 في فرعي حمية MIND المقدمين خلال الوجبات مقارنة بالمجموعة الضابطة؛ لا توجد قوة تأثير ملخصة. - [مجموعة بشرية صغيرة تربط التعرض للملوثات وميكروبات الأمعاء ومقاييس الانتباه](https://nootropikler.com/ar/news/pah-gut-microbiome-attention-impulsivity-cohort): تزامن التعرض المقاس للهيدروكربونات العطرية متعددة الحلقات مع أنماط الميكروبيوم ومجموعات السلوك العصبي لدى 34 بالغًا. ولم يرتبط أي جنس ميكروبي منفرد بمجموعة السلوك بعد التصحيح، لذا تظل الروابط المرشحة استكشافية. - [سبق التعب اليومي والأداء الأسرع من المعتاد انخفاض القدرة اللاحقة على تجاوز التعب](https://nootropikler.com/ar/news/fatigue-processing-speed-override-daily-life): وجد تحليل منسق لست دراسات واقعية أن التعب الأعلى من المعتاد وسرعة المعالجة الأسرع تنبآ كل على حدة بترابط أقوى بين التعب والأداء بعد ساعات، وهو مؤشر على قدرة أقل على تجاوز التعب. - [دعمت الإشارات الثنائية الاتجاه بين مناطق القشرة البصرية التوافق عند الفئران.](https://nootropikler.com/ar/news/reciprocal-visual-cortex-connections-consensus): سجلات الفئران، التدخلات البصرية الوراثية ونماذج الدوائر أشارت إلى أن الاتصالات ثنائية الاتجاه بين V1 وLM تطيل النشاط البصري المتناغم وتحل الإشارات المتضاربة. النتائج محدودة بمهمة بصرية بسيطة وتفسير قائم على نموذج. - [برنامج يجمع بين المنشور والألعاب زاد بعض الدرجات المعرفية بعد السكتة الدماغية.](https://nootropikler.com/ar/news/mindlenses-poststroke-cognitive-rehabilitation-trial): في دراسة عشوائية شملت 60 شخصًا مصابين بسكتة دماغية، أدى الجهاز الذي يجمع بين تكييف المنشور وألعاب الجهاز اللوحي إلى تحسين الذاكرة واللغة في التقييمات بعد العلاج مقارنةً بالعلاج التأهيلي القياسي بدءًا من الشهر الثالث. - [FDA توسع تحذير الدفلى الصفراء السامة ليشمل منتجات Niwali وEasy Forte](https://nootropikler.com/ar/news/fda-yellow-oleander-niwali-easy-forte-alert): أضافت FDA منتجات Niwali Tejocote Pieces وNiwali Tejocote Capsules وEasy Forte Natural Fiber إلى تحذير قائم بعد أن كشفت الاختبارات الدفلى الصفراء السامة. تنصح الوكالة بوقف الاستخدام والتواصل مع مقدم رعاية صحية. - [ملف من مستقلبات الدم ربط الالتزام بحمية البحر المتوسط ببعض مقاييس الإدراك](https://nootropikler.com/ar/news/mediterranean-diet-metabolite-signature-cognition-cohorts): اشتقت دراسة من مجموعتين ملفًا دمويًا من 23 مستقلبًا ارتبط بالالتزام بحمية البحر المتوسط وبعض مقاييس الإدراك. وكان نقل النموذج إلى المجموعة الثانية ضعيفًا حتى أُعيدت معايرته، كما أن الدراسة رصدية. - [تغيّرات ذاكرة التعرّف ارتبطت بتطور المرض في مجموعة مبكرة من ألزهايمر](https://nootropikler.com/ar/news/alzheimer-recognition-memory-progression-cohort): في دراسة تابعت 278 من كبار السن المصابين بضعف إدراكي بسيط فقداني الذاكرة لمدة 24 شهرًا، تنبأ انخفاض القدرة على تمييز الذاكرة والتراجع المبكر بالتحول إلى خرف ألزهايمر، بعد ضبط التحليل لمقاييس أخرى. - [عند تذكر الذاكرة في الفئران، شكلت الخلايا النجمية تسلسلات نشاط زمني](https://nootropikler.com/ar/news/hippocampal-astrocyte-sequences-memory-mice): أظهرت التصوير في الفئران، أثناء تكييف الخوف، تسلسلات الكالسيوم المحصورة في نجوم عصبية CA1 وظهورها مرة أخرى في السياق المشروط. التسجيلات كانت ترابطية؛ ولا تُظهر أن النجوم العصبية تخلق الذاكرة أو أنها ضرورية لها. - [تتبعت خلايا المخيخ في الفئران مكافأة التحفيز العصبي المؤجلة. ](https://nootropikler.com/ar/news/cerebellar-dopamine-reward-prediction-mice): في الفئران، توقعت خلايا الحبيبات في المخيخ المكافئ المكافئ المكافئ ثوابًا مؤجلًا من التحفيز العصبي للدوبامين أو الحزمة الأمامية الوسطى للدماغ، بينما استجابت الألياف المتسلق بعد ذلك. دعمت التدخلات دورًا في هذه المهمة؛ ولم يتم إظهار تأثيرها على الإدراك البشري. - [خوارزميات واجهة الدماغ والحاسوب التكيفية شكّلت التعلم العصبي لدى القرود](https://nootropikler.com/ar/news/assistive-algorithms-shape-bci-learning): تشير التسجيلات الطولية ونموذج شبكة عصبية إلى أن مفككات الواجهة التكيفية ركزت معلومات المهمة في إشارات عصبية أقل أثناء التدريب، بخلاف المفككات الثابتة. - [في مجموعة كبيرة، ارتبط disadvantage الاجتماعي بشكل مستمر بانخفاض درجات الذاكرة الذاتية](https://nootropikler.com/ar/news/social-disadvantage-subjective-memory-longitudinal-cohort): كان العجز الاجتماعي التراكمي مرتبطًا باستمرار بدرجات إدراك ذاتي أقل بين 14,938 بالغًا صينيًا يبلغون من العمر 45 عامًا فأكثر على ست موجات بيانات؛ أظهرت هذه الدرجات ارتباطًا ضعيفًا بالقدرات الإدراكية الموضوعية. - [زرعة دماغية واحدة فكّت الكلام والإيماءات معًا في دراسة عن الشلل](https://nootropikler.com/ar/news/speech-gesture-paralysis-brain-computer-interface): استخدمت دراسة شملت ثلاثة مشاركين زرعة قشرية واحدة لفك محاولات الكلام والإيماءات، مقدمةً إثباتًا للمفهوم من أجل تواصل أكثر طبيعية عبر واجهة الدماغ والحاسوب. - [ارتبط تداخل شفرات الحُصين البطني باسترجاع سريع لذكريات الخوف لدى الفئران](https://nootropikler.com/ar/news/ventral-hippocampus-overlapping-fear-memory-codes): أظهر تصوير الكالسيوم لدى الفئران أن تعلم الخوف جعل تمثيلات السياق المهدد والمحايد أكثر تشابهًا في CA1 البطني، حيث عاد النشاط المرتبط بالتهديد سريعًا أثناء الاسترجاع. - [مراجعة تجمع الأدلة الرصدية حول الكولين الغذائي والإدراك](https://nootropikler.com/ar/news/dietary-choline-cognition-observational-evidence-review): قيّمت مراجعة منهجية وتحليل تلوي للاستجابة للجرعة دراسات رصدية عن الكولين الغذائي ونتائج الإدراك. وتتعلق الأدلة بارتباطات في دراسات قائمة، ولا تختبر ما إذا كانت مكملات الكولين تمنع التدهور. - [غيّر تعلم الخوف المشابك المثبطة في أجزاء مختلفة من عصبونات CA1 لدى الفئران](https://nootropikler.com/ar/news/ca1-inhibitory-synapses-remodel-with-fear-learning): وجد التصوير الطولي أن تكييف الخوف الأثري أعاد تنظيم المشابك المثبطة على التغصنات، لكنه ثبّت المشابك عند القطعة الابتدائية للمحور العصبي في عصبونات الحُصين الهرمية. - [في المتابعة لمدة عامين، كانت درجات الوظيفة التنفيذية مرتبطة بالإنتاجية أكثر من مدة النوم.](https://nootropikler.com/ar/news/sleep-efficiency-executive-function-repeated-cohort): كان ارتفاع كفاءة النوم المقاسة بالجهاز القابل للارتداء عند 233 بالغًا بعمر 55 عامًا وما فوق مرتبطًا بوظائف تنفيذية أفضل؛ ولم تظهر مدة النوم والجودة الذاتية علاقة معنوية بمجالات الإدراك. - [كان انعدام الأمن الغذائي والتوتر مرتبطين بالاختلافات في المهام الإدراكية لدى طلاب الجامعات. ](https://nootropikler.com/ar/news/food-insecurity-stress-college-student-cognition): أظهرت دراسة مقطعية على 230 طالب جامعة أن انعدام الأمن الغذائي والإجهاد مرتبطان بالاختلافات في الانتباه واتخاذ القرارات ومهام مطابقة الذاكرة. هذه العلاقات لا تثبت أن الوصول إلى الطعام سبب اختلاف الدرجات. - [تشير دراسات التمارين إلى أنماط مختلفة لنشاط الدماغ المرتبط بالذاكرة العاملة](https://nootropikler.com/ar/news/exercise-working-memory-fmri-meta-analysis): وجد تحليل تلوي لاحتمالية التنشيط شمل 11 دراسة تصوير بالرنين المغناطيسي الوظيفي أن تغيرات النشاط بعد تدخلات التمرين تختلف جزئيًا عن الفروق لدى ممارسي الرياضة على المدى الطويل. وصغر قاعدة الأدلة يجعل الخرائط استكشافية. - [وجد التحليل البعدي أن النظام الكيتوني يؤدي إلى إشارات معرفية محدودة وزيادات في دهون الدم. ](https://nootropikler.com/ar/news/ketogenic-diet-cognitive-impairment-meta-analysis): وجدت مراجعة لـ12 دراسة مؤشرات معرفية مجمعة لصالح الحمية الكيتونية لدى كبار السن ذوي الاضطراب المعرفي، إلى جانب ارتفاع الكوليسترول الكلي وLDL-C. - [دراسة ما بعد كوفيد ترصد ارتباطات بين ميكروبات الأمعاء وتصوير الدماغ](https://nootropikler.com/ar/news/post-covid-gut-microbiome-brain-imaging-associations): ربطت دراسة مقطعية صغيرة أنماط ميكروبات الأمعاء بالأعراض وقياسات التصوير بالرنين المغناطيسي لدى أشخاص يعانون حالة ما بعد كوفيد. ولا تثبت أن الميكروبيوم سبب تغيرات الدماغ أو الأعراض. - [أظهر التحفيز قرب العصب وعدًا كمقياس لتخطيط الدماغ في دراسة صغيرة عن الوعي](https://nootropikler.com/ar/news/near-nerve-stimulation-consciousness-assessment): قارنت دراسة استطلاعية في مركز واحد تحفيز العصب بتحفيز الجلد لدى 19 شخصًا باضطرابات وعي مطولة؛ ويدعو المؤلفون إلى تحقق خارجي من المقياس القائم على EEG. - [ارتبطت الوحدة المستمرة بصحة أسوأ في مجموعة من كبار السن](https://nootropikler.com/ar/news/loneliness-isolation-trajectories-older-adult-health): ربط تحليل طولي شمل 4,090 بالغًا إنجليزيًا الوحدة المزمنة بصحة بدنية ونفسية أسوأ. وارتبط انتهاء العزلة بإدراك أفضل، لكن البيانات الرصدية لا تثبت السببية. - [درست دراسة جماعية طويلة الأمد مرضيات ألزهايمر والمرونة الإدراكية كبُعدين منفصلين للمخاطر.](https://nootropikler.com/ar/news/alzheimer-pathology-cognitive-resilience-longitudinal-risk): في 3,119 من البالغين المسنين الذين تم متابعتهم لمدة وسطية تبلغ 13,7 سنة، كانت قياسات علم الأمراض ومقياس المرونة الإدراكية المشتقة مرتبطة بشكل مستقل بخطر الخرف؛ التحليل الرصدي لا يثبت السببية. - [كان الـ tau الجبهي مرتبطًا باضطرابات موجات النوم وضعف الذاكرة. ](https://nootropikler.com/ar/news/frontal-tau-linked-to-disrupted-sleep-waves-and-memory): في مجموعات البالغين الأكبر سنًا التي استخدمت مؤشرات Tau PET و EEG وسوائل الدماغ والنخاع الشوكي، ارتبط Tau الجبهي العالي بموجات النوم البطيئة الأقل انتشارًا وضعف الذاكرة الليلية. - [ارتبط تداخل السمات بأخطاء القرار عندما كانت إشارات المهمة غير مؤكدة](https://nootropikler.com/ar/news/feature-interference-cost-of-task-uncertainty): ربط السلوك البشري وتسجيلات V1 لدى القرود والنمذجة بين عدم اليقين بشأن المهمة الإدراكية وترميز أقوى للسمات غير المهمة وتمثيلات عصبية أقل تمايزًا. - [في الطقس الحار، أثرت العطش أثناء ركوب الدراجة على نقاط الانتباه؛ لكنه لم يؤثر على اختبار الوظائف التنفيذية](https://nootropikler.com/ar/news/thirst-satiation-heat-exercise-executive-function): في 12 رجلاً، وفرت المياه والمصل الوريدي ترطيبًا مشابهًا؛ ومع ذلك، كان الأشخاص الذين تلقوا المصل أكثر شعورًا بالعطش وأكثر إحساسًا بحرارة الجسم. لم تكن درجات اختبار فلانكر والمزاج مختلفة. - [تعلّم الرائحة أعاد ترتيب التمثيلات العصبية في أسماك الزيبرا](https://nootropikler.com/ar/news/odor-learning-reorganizes-brain-representations-in-zebrafish): في أسماك الزرد اليافعة والبالغة، ميّز التدريب على تمييز الروائح الأنماط العصبية المرتبطة بالمهمة في منطقة pDp؛ وارتبطت هندسة هذه التمثيلات بأداء الأفراد. - [عصبونات قشرية مثبطة نادرة عززت النشاط المتزامن والنوم لدى الفئران](https://nootropikler.com/ar/news/cortical-sst-chodl-neurons-promote-sleep-mice): عزز التنشيط الانتقائي لعصبونات Sst-Chodl المثبطة التزامن القشري والنوم لدى الفئران. يوسع النشر في سبتمبر أبحاث الدوائر المتاحة سابقًا كمسودة أولية؛ ولا يثبت علاجًا للنوم لدى البشر. - [تصميم قطب تخطيط قشري دون ميكروني قائم بذاته يستهدف تسجيلًا مرنًا من سطح الدماغ](https://nootropikler.com/ar/news/submicron-ecog-electrode-array): أفاد مهندسون بمصفوفة رقيقة قائمة بذاتها لتخطيط كهربية القشرة مستوحاة من بنية جناح اليعسوب، لمعالجة مفاضلة هندسية مهمة لواجهات الدماغ والحاسوب المستقبلية. - [برنامج مجتمعي لإعادة التأهيل لدى باركنسون أعقبه تحسن في اختبارات إدراكية](https://nootropikler.com/ar/news/parkinsons-pd-core-cognitive-rehabilitation): في دراسة قبلية وبعدية شملت 45 شخصًا، أعقب برنامج جماعي من سبع جلسات تحسن في اختبارات الإدراك العام والحكم العملي. ومن دون مجموعة ضابطة، لا يمكن فصل أثر البرنامج عن أثر التدريب أو عوامل أخرى. - [كان الملف الصحي متعدد المجالات مرتبطًا بالشيخوخة الإدراكية في ثلاث مجموعات](https://nootropikler.com/ar/news/intrinsic-capacity-profile-cognitive-aging-three-cohorts): في 26,022 من البالغين في ثلاث مجموعات عمرية، كانت التدهورات في المجالات الصحية غير الإدراكية مرتبطة بدرجات إدراكية أقل وزيادة خطر التدهور الإدراكي المستقبلي. - [خفضت العملية الميتوكوندرية المرتبطة بـ Tau الاضطرابات في النماذج الحيوانية. ](https://nootropikler.com/ar/news/nih-tau-mitochondria-reverse-electron-transport): نقلت NIH تجارب ربطت بين تاو المتغير والتدفق الإلكتروني العكسي في الميتوكوندريا؛ أظهر منع المسار فائدة في النماذج، ولم تُجرى تجارب سريرية على المرضى. - [في الدراسة ارتبطت الاستراحة الطويلة بسرعة معالجة أبطأ لدى البالغين المسنين.](https://nootropikler.com/ar/news/pointer-zzz-napping-apnea-cognition): في تحليل أساسي شمل 686 مشاركا مسنا في برنامج U.S. Pointer، ارتبط النوم الطويل خلال النهار بانخفاض سرعة المعالجة؛ لم يتم إثبات السببية والتفاعل العام مع انقطاع التنفس. - [تحليل متعدد الأوميكس حدّد مؤشرات حيوية مرشحة مرتبطة بمراحل باركنسون](https://nootropikler.com/ar/news/parkinsons-proteo-metabolomic-stage-biomarkers): جمع تحليل ثانوي لبيانات مبادرة مؤشرات تطور باركنسون بين البروتينات والمستقلبات في السائل الدماغي الشوكي والبلازما للبحث عن مؤشرات مرشحة. نتائج التعلم الآلي استكشافية وتحتاج إلى تحقق سريري مستقل. - [ارتبطت مجموعة بيانات بنك المملكة المتحدة (UK Biobank) بتركيز النياسين الغذائي والإدراك وخطر الخرف](https://nootropikler.com/ar/news/niacin-diet-density-cognition-dementia-cohort): درست دراسة جماعية واسعة السكان معادلات النياسين الغذائية المتعلقة بالوظيفة المعرفية وتشخيصات الخرف الجديدة؛ لا يمكن للتصميم الرصدي أن يثبت أن زيادة النياسين تمنع التدهور. - [كانت الذكريات الأكثر وضوحًا مرتبطة بانتباه بصري أدق.](https://nootropikler.com/ar/news/distinct-memories-help-focus-on-visual-targets): في البشر، في مهمة البحث البصري باستخدام التصوير بالرنين المغناطيسي الوظيفي وتتبع العين، كانت أنماط الذاكرة في الحُصين الأكثر وضوحًا مرتبطة بتحركات العين الموجهة للذاكرة بشكل أكثر دقة وبنشاط منافس أقل. - [استدعت SUPPLX منتجين بسبب اليوهيمبين غير المصرح به ](https://nootropikler.com/ar/news/fda-recalls-products-undeclared-yohimbine): استدعت SUPPLX منتجي Business Pill وBranch Manager for Men طوعًا بعد العثور على يوهيمبين غير مُصرح به في الاختبارات؛ وأصدرت إدارة الغذاء والدواء FDA الإعلان في 4 سبتمبر. - [أفادت تجربة صغيرة مضبوطة بالتحفيز الوهمي بتحسن إدراكي بعد تحفيز المخيخ لدى مرضى ألزهايمر](https://nootropikler.com/ar/news/alzheimer-cerebellar-rtms-fnirs-rct): في تجربة عشوائية شملت 33 شخصًا، ارتبط التحفيز المغناطيسي المتكرر للمخيخ لمدة أسبوعين بتحسن الإدراك العام مقارنةً بالتحفيز الوهمي حتى الأسبوع 12. وتقيس تغيّرات fNIRS الاستجابات الدموية، لا النشاط العصبي مباشرةً. - [ارتبطت دراسة أوروبية بالنوم الطويل جدًا والقيلولات النهارية مع تدهور إدراكي.](https://nootropikler.com/ar/news/european-sleep-duration-cognition-share-analysis): ربط تحليل مقطعي لـ88,889 مقابلة من دراسة SHARE النوم لمدة 10 ساعات على الأقل والقيلولة النهارية بانخفاض الإدراك؛ ولا يثبت أن أنماط النوم تسبب ضعفًا إدراكيًا. - [التدريب المبكر المنظم شكل التعلم المرن لدى الفئران.](https://nootropikler.com/ar/news/structured-practice-shaped-flexible-learning-in-mice): في الفئران التي تعلمت مهمة توقيت، ارتبطت الأمثلة المبكرة المنظمة باستراتيجيات لاحقة أكثر مرونة وبنشاط القشرة الشمية الداخلية المرتبط بالمهمة؛ واختبرت الدراسة أيضًا تنبؤات نموذج الشبكة العصبية. - [مؤشرات ألزهايمر الحيوية ميّزت فئة من مرضى باركنسون شهدت تراجعًا أسرع](https://nootropikler.com/ar/news/parkinsons-alzheimer-biomarker-cognitive-profiles): في مجموعة مستقبلية، استوفى 42 من أصل 449 مشاركًا إيجابيًا لمؤشرات باركنسون الحيوية معايير مؤشرات ألزهايمر، وأظهروا لاحقًا تراجعًا إدراكيًا وحركيًا أكبر. النتيجة الرصدية لا تثبت السببية. - [غيّر تركيز الغلوتامات حالات إشارة مستقبلات AMPA في مشابك الفئران](https://nootropikler.com/ar/news/glutamate-levels-tune-ampa-receptor-conductance): وجدت تجارب على مشابك عصبونات بينية لدى الفئران أن انخفاض التعرض للغلوتامات غيّر خصائص مستقبلات AMPA عبر إشغال حالات توصيل مختلفة. - [أظهرت منطقتا الجانبية للفئران أدوارًا مختلفة في المهمات البصرية ومهمات الاختيار. ](https://nootropikler.com/ar/news/mouse-parietal-cortex-functional-architecture): تصوير آلاف الخلايا العصبية للفئران بميسوسكوب، أظهر أن المناطق الوسيطية الجدارية AM و A تمثل معلومات بصرية/اختيارية وتاريخ/موقف الاختيار بطرق مختلفة. الدراسة ترسم التنظيم الوظيفي؛ لكنها لا تثبت أنها تسبب السلوكيات بمفردها. - [أظهر السيماغلوتيد تحسناً في قياسات الذاكرة لدى الفئران المسنة؛ تأثيره على البشر غير معروف](https://nootropikler.com/ar/news/nih-semaglutide-late-life-mice-cognition): في الدراسة التي نقلتها NIH على الفئران، حسن السيماغلوتيد في سن متقدمة قياسات الذاكرة المكانية؛ ولم يتم إثبات أهميته السريرية لدى البشر. - [دراسة ترسم ممالك متعددة من ميكروبات الأمعاء والإدراك في الاكتئاب الشديد](https://nootropikler.com/ar/news/multi-kingdom-gut-microbiome-depression-cognition): وجدت دراسة شملت 121 شابًا بالغًا مصابين بنوبة اكتئاب أولى و117 مشاركًا ضابطًا اختلافات في مؤشرات البكتيريا والفيروسات والفطريات والعتائق. ولا يثبت التصميم المقطعي أن تغيرات الميكروبيوم تسبب الاكتئاب أو الفروق المعرفية. - [رسمت طريقة تصوير دماغي تغير تدفق الإشارات القشرية مع الحالة الذهنية](https://nootropikler.com/ar/news/human-cortical-signal-flow-hierarchy-changes-with-state): استنتج إطار اتصال فعال تم التحقق منه تسلسلاً هرميًا قشريًا بشريًا أصبح أكثر تسطحًا أثناء المعالجة الموجهة للخارج وأكثر حدة في الحالات الموجهة للداخل. - [نموذج ذكاء اصطناعي أعاد بناء إشارات الدماغ العميقة من تسجيلات القشرة لأبحاث التحفيز العميق](https://nootropikler.com/ar/news/deep-learning-subcortical-signal-reconstruction-dbs): اختبر تحليل متعدد المراكز لتسجيلات أشخاص باضطرابات حركية ما إذا كان نموذج توليدي يستطيع استنتاج النشاط تحت القشري من إشارات القشرة لسد فجوات بيانات التحفيز المغلق الحلقة. - [أفادت تجربة دعم الغذاء أثناء الحمل عن اختلافات في هياكل دماغ الجنين. ](https://nootropikler.com/ar/news/mikhuna-prenatal-diet-fetal-brain-growth): في دراسة عشوائية في الإكوادور شارك فيها 215 حمل، كان لبرنامج تنوع الغذاء علاقة ببعض الاختلافات في نمو التركيبات الدماغية الجنينية؛ وقد قاست الدراسة التشريح وليس الإدراك في وقت لاحق. - [في الاضطراب المعرفي المبكر، فحصت دراسة البروبيوتيك الإدراك وعوامل تاو.](https://nootropikler.com/ar/news/multistrain-probiotics-early-cognitive-impairment): في 87 شخصًا يعانون من اضطراب إدراكي مبكر، أظهرت دراسة عشوائية لمدة 24 أسبوعًا انخفاض pTau181 وإشارات بصرية-مكانية؛ لم يكن هناك فرق في درجات MMSE أو الذاكرة اللفظية أو التنفيذي. - [يمكن لإيقاعات الثيتا أن تشير إلى الذكريات التي ستتعزز أثناء النوم](https://nootropikler.com/ar/news/theta-rhythms-may-mark-memories-for-sleep-consolidation): ربط تخطيط الدماغ الكهربائي أثناء تعلم الكلمات-الكائنات لدى 31 شابًا النشاط الثيتا الأقوى بتوافق موجة النوم بعد القيلولة وثبات الذاكرة؛ العلاقة لا تظهر السببية. - [كيف يُستعاد ذكرى ما ترك أثرًا في النشاط الدماغي اللاحق](https://nootropikler.com/ar/news/recalling-a-memory-leaves-a-trace-in-brain-activity): في تجربة fMRI للذاكرة، أثرت تلميحات الاسترجاع على الأنماط العصبية اللاحقة للأزواج البصرية–الكلمات التي تم تعلمها؛ كان أداء المشاركين في اختبار الذاكرة متشابهاً. - [حذرت إدارة الغذاء والدواء من استخدام الجلوتاثيون من فئة المكملات في الخلطات القابلة للحقن](https://nootropikler.com/ar/news/fda-glutathione-injection-quality-alert): أبلغت إدارة الغذاء والدواء الأمريكية (FDA) عن آثار ضارة لدى 30 مريضًا على الأقل بعد استخدام الغلوتاثيون الوريدي المحضّر صيدلانيًا؛ وحذرت من استخدام مواد بدرجة المكملات الغذائية للحقن. - [كان تأثير التحفيز النخاعي المضاف إلى تدريب جهاز المشي على المشي في مرض باركنسون محدوداً](https://nootropikler.com/ar/news/parkinson-spinal-magnetic-stimulation-treadmill-trial): في دراسة عشوائية شملت 70 شخصًا مصابًا بمرض باركنسون، لوحظت زيادة مؤقتة في سرعة المشي ومن ثم إشارة التجميد مع التحفيز وتدريب السير على السير الكهربائي؛ ولم تكن الأفضلية العامة دائمة. - [لمغير الجلوتامين الحالة المزاجية أو الإدراك أثناء التعرض قصير المدى لارتفاعات شاهقة محاكاة. ](https://nootropikler.com/ar/news/glutamine-hypoxia-cognition-rct): أفادت دراسة عشوائية على الشباب الذكور أن القياسات النفسية الحيوية لفترة ست ساعات من نقص الأكسجة المحاكى وما يعادل 4500 متر لم تتغير، وأن الجلوتامين لم يوفر أي فائدة قابلة للكشف. - [أفاد المعهد الوطني للصحة (NIH) بالفروقات في طي الحمض النووي المرتبطة بالشيخوخة ومرض ألزهايمر.](https://nootropikler.com/ar/news/nih-dna-organization-alzheimers-aging): أفاد تقرير NIH لشهر أغسطس بالفروق في التفاعلات الجينية والنشاط الجيني في خلايا الفص الجبهي بعد الوفاة لدى المتبرعين المصابين بمرض الزهايمر؛ ولم يتم إظهار السببية. - [لم تجد دراسة الفول السوداني فائدة كبيرة في الوظائف الإدراكية أو نشاط الدماغ.](https://nootropikler.com/ar/news/peanut-consumption-memory-complaints-rct): في دراسة الفول السوداني لمدة 12 أسبوعًا على 27 بالغًا يعانون من شكاوى في الذاكرة، لم يتم العثور على فرق معنوي بين المجموعات في الإدراك أو النشاط الدماغي أو المؤشرات الحيوية المعدلة. - [نظم الخلايا العصبية المستجيبة لليقظة في الفئران ضغط النوم. ](https://nootropikler.com/ar/news/wake-history-neurons-regulate-sleep-drive-in-mice): تغيير التدخل في الخلايا العصبية المستجيبة لليقظة في الفئران غيّر نوم NREM وضغط النوم؛ توضح النتائج الدوائر المنظمة للنوم، ولا تظهر أن قلة النوم آمنة. - [الأورغانويدات الدماغية التي تعيش لفترة طويلة أظهرت خصائص مراحل متقدمة من التطور البشري](https://nootropikler.com/ar/news/nih-brain-organoids-long-term-maturation): أفاد المعهد الوطني للصحة (NIH) أن العضيات الدماغية المنتجة من الخلايا الجذعية نمت لمدة ست سنوات تقريبًا وأن العمر الجزيئي تقدم مع مرور الوقت؛ وهذه نماذج مخبرية. - [دماغ الفئران أعاد استخدام المكونات العصبية في العمليات الإدراكية. ](https://nootropikler.com/ar/news/reusable-modular-cognition-mouse-brain): في مهمة مطابقة مؤجلة، أعادت الفئران استخدام فضاءات فرعية عصبية في القشرة الجبهية والجدارية لمعالجة المنبهات والحفاظ على الذاكرة. دعمت نماذج الشبكات القائمة على البيانات تفسير التنظيم الوحداتي؛ لكن النتيجة تخص مهمة واحدة ولا تثبت وجود وحدات معرفية بشرية. - [في تحليل MCI الوسيط، غيّر حمية البحر الأبيض المتوسط المؤشرات الأيضية](https://nootropikler.com/ar/news/mediterranean-diet-metabolomics-mci-interim): تدخل حمية البحر الأبيض المتوسط لمدة 24 أسبوعًا على 47 بالغًا يعانون من ضعف إدراكي خفيف بعض المستقلبات في البلازما؛ بعض التغيرات كانت مرتبطة بنتائج الاختبارات المعرفية. العلاقة لا تثبت الفائدة الإدراكية. - [أضافت إدارة الغذاء والدواء الأمريكية سجل موردي أغسطس إلى التحذير الحالي بشأن استيراد الكراتوم.](https://nootropikler.com/ar/news/fda-adds-kratom-supplements-to-import-detention-alert): إصدار 17 أغسطس من تحذير استيراد FDA رقم 54-15 يحتوي على سجل مورد جديد؛ آلية حجز الكراتوم أقدم من عام 2026 وتشمل استيرادًا معينًا. - [أفادت دراسة حمية البحر الأبيض المتوسط الغنية بالبروتين عن فروق متواضعة في درجات الإدراك. ](https://nootropikler.com/ar/news/promed-protein-mediterranean-exercise-cognition): في دراسة مدتها ستة أشهر شملت 105 كبار سن معرضين لسوء التغذية وتراجع معرفي محتمل، تحسنت الحالة الغذائية ودرجات الوظائف المعرفية في مجموعات الاستشارة الغذائية مقارنة بالمجموعة الضابطة للمطويات. - [درس العمل على الخبز المحتوي على ألياف ما قبل البروبيوتيك القابلية للتطبيق والإدراك لدى كبار السن.](https://nootropikler.com/ar/news/prebiotic-fibre-bread-older-adults-feasibility): اختبار القابلية للتطبيق درس خبزًا يوفر 10 غرامات إضافية من الألياف البريبايوتيكية يوميًا لكبار السن الذين لديهم تناول منخفض من الألياف عادةً؛ وتم اعتبار النتائج المعرفية وغيرها كاستنتاجات أولية. - [تم الحفاظ على آثار الذاكرة خلال السبات الصناعي في الفئران.](https://nootropikler.com/ar/news/memory-traces-persist-after-artificial-hibernation-in-mice): حتى بعد السبات الاصطناعي لدى الفئران، على الرغم من اختفاء أكثر من نصف المشابك في الحُصين، تم الاحتفاظ بالذكريات المختارة؛ الروابط المترابطة المرتبطة بالذاكرة كانت أكثر حفاظًا. - [غيّر TIMP2 الحالات المرتبطة بالعمر لدى الميكروغليا في الفئران](https://nootropikler.com/ar/news/timp2-microglia-aging-mouse-brain): إن حذف TIMP2 في الفئران أدى إلى تفاقم بعض معايير الميكروغليا المرتبطة بالعمر، بينما غير التطبيق في الفئران المسنة نمط الالتهاب والبلعمة. هذه النتائج قبل السريرية لا تظهر فائدة معرفية أو تدخلاً آمناً للبشر. - [أعلن ويسكونسن عن معالجة المستقلب المعوي المرتبط بالتغيرات المرتبطة بمرض الزهايمر](https://nootropikler.com/ar/news/gut-imidazole-propionate-alzheimer-announcement): أعلنت جامعة ويسكونسن–ماديسون عن مستقلب بكتيري معوي ارتبط لدى البشر بمقاييس الإدراك، وفي النماذج التجريبية بتغيرات شبيهة بمرض ألزهايمر؛ ونُشرت الدراسة في 26 يونيو. - [ارتبطت البلازمانوجينات المستخرجة من المحار البحري بنتائج أعلى في الذاكرة اللفظية في دراسة صغيرة. ](https://nootropikler.com/ar/news/scallop-plasmalogens-verbal-memory-rct): أظهرت دراسة استمرت 12 أسبوعًا وشملت 68 بالغًا يابانيًا مختارًا إشارة مرتبطة بالذاكرة اللفظية مع بلازمالوجينات مشتقة من الإسكالوب؛ ولا تُعرف الآثار طويلة الأمد. - [أظهرت دراسة الكرياتين التي استمرت اثني عشر أسبوعًا مؤشرات معرفية استكشافية إلى جانب زيادة القوة. ](https://nootropikler.com/ar/news/creatine-cognition-middle-aged-older-adults-rct): في دراسة كرياتين لمدة 12 أسبوعًا، تم تحديد نتائج الإدراك لـ 64 مكملًا استكشافيًا؛ تم اختيار المشاركة في برنامج التمرين والنظام الغذائي وفقًا للتفضيل الشخصي. - [لدونة نظام الإندوكانابينويد دعمت التعلم بتجربة واحدة في الفئران. ](https://nootropikler.com/ar/news/striatal-endocannabinoids-one-shot-learning-mice): في الفئران، أدى تلامس قصير وفردي بالشريط اللاصق إلى تحفيز التجنب اللاحق واللدونة القشرية-المخططية؛ أدى اختلال مسار الإندوكانابينويد إلى إعاقة التعلم. المهمة الجديدة للتجنب هي نموذج حيواني، وليست دليلاً على تحسين الذاكرة البشرية. - [أدى التأمل والعمل على التنفس التجريبي إلى تقليل القلق لدى مرضى باركنسون](https://nootropikler.com/ar/news/parkinson-meditation-breathwork-anxiety-pilot-trial): في تجربة عشوائية صغيرة، قلل التأمل وتمارين التنفس عن بعد لمدة ستة أسابيع القلق المرتبط بمرض باركنسون مقارنة بقائمة الانتظار؛ ركزت الدراسة على القلق وليس على الإدراك. - [ارتباط دراسة نسيج الدماغ البشري بتخزين الجلوكوز المتغير تم ربطه بمرض ألزهايمر. ](https://nootropikler.com/ar/news/brain-glucose-glycogen-alzheimer-human-brains): أظهرت دراسة فحصت 230 دماغًا بعد الوفاة ارتباط الهياكل المرتبطة بالجليكوجين بمرض تاو في الزهايمر؛ كما لوحظت تغييرات في المراحل المرضية المبكرة. لا يمكن لفحص الأنسجة تحديد أي التغيير حدث أولاً أو الفائدة من تغيير النظام الغذائي. - [في دراسة صغيرة عن اضطراب سلوك حركة العين السريعة، أدى التدريب الرقمي على الإدراك إلى زيادة درجات الوظائف التنفيذية](https://nootropikler.com/ar/news/cogtrail-rbd-cognitive-training-executive-function): في 82 شخصًا يعانون من اضطراب سلوك نوم حركة العين السريعة المعزول، ارتبط تدريب معرفي رقمي لمدة خمسة أسابيع وإرشادات نمط الحياة بمكاسب معتدلة في الوظائف التنفيذية مقارنةً بقائمة الانتظار. - [اختبر المجهر الهولوغرافي الاتصال بين مناطق الدماغ](https://nootropikler.com/ar/news/two-photon-holographic-mesoscope-neural-circuits): سجّل نظام جديد ثنائي الفوتون لدى الفئران استجابات الدوائر العصبية اللاحقة أثناء تحفيز عصبونات مختارة على امتداد مليمترات. يتيح تجارب على دوائر تربط مناطق الدماغ؛ وهو أداة بحثية خاصة، وليس تطبيقًا بشريًا. - [تمت ملاحظة إشارة معرفية محتملة أثناء إعادة التأهيل بعد علاج باركنسون المتقدم](https://nootropikler.com/ar/news/parkinson-device-aided-therapy-rehabilitation-cognition): في دراسة مفتوحة وعشوائية شملت 54 شخصًا بدأوا علاج مرض باركنسون المدعوم بالجهاز، ارتبط التأهيل المخصص للشخص بأداء إدراكي أفضل خلال عام واحد؛ ويجب تأكيد النتيجة الثانوية. - [لم تجد الدراسة المطابقة للكافيين أي فائدة إضافية في الانتباه من صيغة مشروب الطاقة](https://nootropikler.com/ar/news/caffeine-matched-energy-drink-attention-trial): في 116 بالغًا، لم يكن مشروب الطاقة متفوقًا على مشروب التحكم المماثل المحتوي على 200 ملغ من الكافيين في جلسة اختبار حادة واحدة بالنسبة للانتباه أو الذاكرة. - [تم تحديد ترسّبات الميتوكوندريا في أدمغة نموذج آلزهايمر](https://nootropikler.com/ar/news/mitochondrial-plaques-alzheimers-neuronal-processes): في فئران نموذج آلزهايمر وفي الأنسجة البشرية بعد الوفاة، تم تحديد تراكم الميتوكوندريا مع الإخلال بالتنظيف الليزوزومي في امتدادات الخلايا العصبية. تصف النتائج المرض؛ لكنها لا تظهر تأثيرًا علاجيًا أو إدراكيًا. - [اختلفت مجموعات الذاكرة في المكاك وفقًا للمدة الزمنية منذ التعلم ](https://nootropikler.com/ar/news/macaque-experience-reorganizes-memory-traces): أظهرت تسجيلات المكاك أن التتابعات المكتسبة حديثًا والقريبة والأقدم أُعيد تنشيطها بطرق مختلفة أثناء النوم؛ وأن الذكريات القديمة شكلت مجتمعات أكثر استقرارًا وترابطًا. لا يمكن للدراسة العرضية تتبع تغير الخلايا الفردية بمرور الوقت. - [لم يجد دراسة نافذة الطعام 16:8 لمدة أربعة أسابيع تأثيرًا إضافيًا على الإدراك.](https://nootropikler.com/ar/news/time-restricted-eating-working-memory-women): تحسنت الذاكرة العاملة والانتباه مع مرور الوقت في كلا المجموعتين لدى 43 امرأة صحية؛ لم يوفر الصيام المحدود بالوقت 16:8 ميزة معرفية كبيرة مقارنة بالتغذية العادية. - [أفاد اختبار تجريبي صغير لـ GeNeurofil بتغيرات في الاختبارات والمؤشرات لدى الأشخاص المصابين بضعف إدراكي خفيف](https://nootropikler.com/ar/news/geneurofil-mci-pilot-trial): في تجربة تجريبية لمدة ستة أشهر على 54 شخصًا يعانون من ضعف إدراكي خفيف إلى متوسط، كانت GeNeurofil مرتبطة بنتائج اختبارات أفضل ومستويات منخفضة من علامات البلازما؛ يشير المؤلفون إلى الحاجة لدراسات تحقق أكبر. - [اختبر دراسة صغيرة حول الزهايمر الصيام والتنظيم الغذائي في نظام غذائي كيتوجيني نباتي](https://nootropikler.com/ar/news/plant-rich-ketogenic-fasting-alzheimer-trial): في دراسة عشوائية مع تعمية مقيمي النتائج استمرت ستة أشهر وشملت 60 شخصًا يتلقون الرعاية المعتادة لمرض ألزهايمر، ارتفع متوسط درجة MMSE في مجموعة التدخل المشترك، بينما انخفض في مجموعة الضبط. ولا يفصل التصميم أثر الحمية عن أثر الصيام. - [أفادت دراسة التغذية المدعومة بالذكاء الاصطناعي بتغيرات إدراكية لدى سكان دور الرعاية ذوي التغذية غير الكافية. ](https://nootropikler.com/ar/news/ai-guided-nutrition-long-term-care-cognition): في دراسة مرحلية شملت 108 شخص يتلقون رعاية طويلة الأمد، بعد تقديم الدعم الغذائي المصمم حسب الفرد، تحسنت قياسات التغذية والإدراك بشكل أكبر في المجموعة التي كانت تعاني من سوء التغذية الشديد. لا يمكن للتصميم أن يثبت أن التغيرات كانت ناجمة عن الذكاء الاصطناعي. - [استمر تفعيل ذكريات المهارة في الفئران بشكل مستقل عن الحصين](https://nootropikler.com/ar/news/procedural-memory-replay-independent-hippocampus): في الفئران المدربة، أعيد تفعيل تسلسلات نشاط الجسم المخطط الظهري المرتبطة بالتجربة الإجرائية أثناء النوم حتى بعد إصابات الحُصَين. توقّع هذا النشاط تطوّر المهام اللاحقة؛ التجارب المباشرة للتعطيل مطلوبة لدور سببي. - [استعراض المكملات أظهر نتائج متباينة في دراسات الزهايمر واضطرابات الإدراك الخفيفة](https://nootropikler.com/ar/news/supplements-mci-alzheimer-network-review-2026): وجدت مراجعة شبكية شملت 29 دراسة نتائج متباينة بحسب الاختبار في مرض ألزهايمر والضعف الإدراكي الطفيف؛ ولم يحسّن أي مكمل درجة ADAS-Cog بدرجة ذات دلالة. - [الخلايا المناعية في الحُصين البشري تتغير في منتصف العمر](https://nootropikler.com/ar/news/human-hippocampus-immune-cells-shift-in-midlife): في أنسجة الحصين بعد الوفاة لـ 40 بالغًا تتراوح أعمارهم بين 20 و95 عامًا، تغير توزيع خلايا المناعة في منتصف العمر: انخفاض خلايا الميكروغليا الثابتة بينما زادت الخلايا الشبيهة بخلايا الدم التي تحمل خصائص الالتهاب. - [تم ربط قيود السكر التاريخية بنتائج صحة الدماغ والعقل في سن متقدمة. ](https://nootropikler.com/ar/news/early-life-sugar-rationing-brain-aging): أجرت دراسة التجربة الطبيعية مقارنة البالغين الذين تعرضوا لتقييد السكر في حياتهم المبكرة مع الجيل المولود لاحقًا ووجدت علاقات مع صحة الدماغ في الشيخوخة؛ التصميم التاريخي لا يثبت سببية التغذية. - [ربطت الدراسة عبر الإنترنت بين مرضى كوفيد الطويل ودرجات أقل في ذاكرة العمل.](https://nootropikler.com/ar/news/long-covid-linked-to-lower-working-memory-scores): في دراسة مستعرضة على الإنترنت شارك فيها 1,064 شخصًا، كان COVID طويل المبلغ عنه مرتبطًا بدرجات أقل في اختبار الذاكرة البصرية العاملة القصيرة؛ لا يمكن لمهمة واحدة تشخيص اضطراب عام. - [أغلقت إدارة الغذاء والدواء التحقيق المرتبط بتفشي السالمونيلا المرتبط بكبسولات MOGO مورينغا](https://nootropikler.com/ar/news/fda-closes-moringa-salmonella-outbreak-investigation): تقرير الإغلاق الخاص بـ FDA في 17 يوليو أبلغ عن 34 مرضًا و11 إدخال إلى المستشفى مرتبطة ببعض دفعات كبسولات مورينغا MOGO؛ المنتجات القديمة قد توجد في المنازل. - [أدى التذكّر المحدود بالوقت مع التلميحات إلى زيادة استدعاء الذاكرة في الاختبارات المتكررة.](https://nootropikler.com/ar/news/cued-recall-format-increases-repeated-memory-retrieval): في التجارب الأربع، وفّرت الإشارات المحدودة بالحرف الأول مكاسب أكبر في الاسترجاع المتكرر مقارنة بالاسترجاع الحر؛ وعندما أجاب المشاركون بالترتيب الذي يرغبون فيه، اختفى التفوق. - [تتعامل زوائد الحصين الغصنية بشكل مستقل مع إشارات التعلم](https://nootropikler.com/ar/news/hippocampal-dendrites-process-learning-signals): أظهرت مراقبة الفئران في البيئة الافتراضية أن تتبّع الجهد يعرض بعض إشارات شجيرات CA3 في الحصين لتغير قبل جسم الخلية في البيئة الجديدة؛ هذا يدعم المعالجة المحلية لكنه لا يثبت فائدة الذاكرة. - [كانت مستويات p-tau217 في الدم مرتبطة بخطر التدهور المعرفي المستقبلي لدى كبار السن. ](https://nootropikler.com/ar/news/blood-ptau217-predicts-risk-of-cognitive-impairment): ارتبطت البيانات الرصدية في البداية لـ 2,684 بالغًا يتمتعون بصحة إدراكية جيدة بمستويات عالية من p-tau217 في الدم مع خطر أكبر للتدهور لاحقًا؛ وكانت التوقعات لعشر سنوات للمجموعة الأعلى أكثر غموضًا. - [اختبرت دراسة LatAm-FINGERS برنامجًا متعدد المكونات لخطر الانخفاض المعرفي ](https://nootropikler.com/ar/news/latam-fingers-lifestyle-cognition-trial): اختبرت دراسة عشوائية واسعة في أمريكا اللاتينية التمارين والتغذية والتدريب المعرفي وإدارة مخاطر الأوعية الدموية لدى كبار السن المعرضين للخطر؛ وقد حقق التدخل تفوقًا متواضعًا في المقياس الرئيسي للوظيفة الإدراكية. - [في دراسة آلزهايمر، لم يبطئ دواء ceperognastat التقدم السريري](https://nootropikler.com/ar/news/ceperognastat-alzheimers-phase2-trial-no-clinical-benefit): في دراسة المرحلة الثانية التي شملت 327 شخصًا، لم تُبطئ سيبيروجناستات بشكل ملحوظ تقدم مرض الزهايمر العرضي المبكر على مدى 100 أسبوع؛ وفي الجرعات العالية، كان التقدم بناءً على النموذج أسرع من الدواء الوهمي. - [بدأت المؤسسات الأمريكية عملية إدراج منتجات 7-OH المركزة في الجدول](https://nootropikler.com/ar/news/dea-begins-7-oh-scheduling-process): تحديث إدارة الغذاء والدواء الأمريكية في 13 يوليو شرح عملية الرقابة المؤقتة على 7-OH المكثف والمشتقات الاصطناعية؛ العرض والقرار النهائي هما مرحلتان منفصلتان. - [الأصوات العشوائية أثناء القيلولة أعاقت الموجات البطيئة والذاكرة. ](https://nootropikler.com/ar/news/random-sleep-audio-disrupted-slow-waves-and-recall): في دراسة على 20 رجلاً صحياً تتضمن جلستين لقيلولة، قلّت الأصوات العشوائية من النوم الموجي البطيء وأثرت سلبًا على تذكر مطابقة الأشكال البصرية؛ بينما لم تتأثر الذاكرة اللفظية والوظيفية. نُشرت المقالة في 25 يونيو، وتم الإعلان عنها في فرايبورغ في 9 يوليو. - [كان اثنان من مؤشرات الرنين المغناطيسي مرتبطين بالتقدم الإدراكي في مرحلة التصلب المتعدد المبكر. ](https://nootropikler.com/ar/news/multiple-sclerosis-mri-markers-cognitive-progression): كانت مؤشرات التصوير بالرنين المغناطيسي في التشخيص لدى 87 شخصًا مصابين بالتصلب المتعدد المتكرر-المنتكس المبكر مرتبطة بالتدهور الإدراكي اللاحق بغض النظر عن الانتكاسات أو نشاط التصوير بالرنين المغناطيسي. - [ارتبط نمط عمر الدماغ الإقليمي بعلامة تاو في الدم والمعرفة](https://nootropikler.com/ar/news/regional-brain-age-pattern-links-tau-marker-and-cognition): في تحليل مقطعي شمل 71 شخصًا من كبار السن، وُجد ارتباط غير مباشر بين p-tau217 والإدراك عبر نمط واحد لعمر الدماغ في التصوير بالرنين المغناطيسي؛ ولم تكن الارتباطات المباشرة والإجمالية ذات دلالة. - [الضوضاء أثناء النوم أضعفت إشارات الذاكرة في الحصين لدى الفئران. ](https://nootropikler.com/ar/news/sleep-noise-interrupts-hippocampal-memory-consolidation-in-rats): الأصوات القصيرة المزامنة مع موجات الحصين الحادة أثناء نوم الفئران قللت من نشاط الموجة وأضعفت الثبات في مهمة الذاكرة؛ وتأثر الأثر باختلاف المهمة. - [لم يزيد دقيق الذرة المحسن من درجات القدرة الإدراكية لدى المراهقات الإثيوبيات.](https://nootropikler.com/ar/news/vitamin-fortified-corn-flour-teen-cognition-ethiopia): لم تجد دراسة استمرت ستة أشهر وشملت 472 فتاة فائدة معرفية ذات دلالة لدقيق الذرة المدعّم بالفولات وB12؛ وظهر فرق ثانوي في اختبار اللغة بحسب حالة التقزّم. - [في مجموعة أسترالية، ارتبط استهلاك عالٍ من الأطعمة فائقة المعالجة بانخفاض درجات الانتباه.](https://nootropikler.com/ar/news/ultra-processed-foods-attention-apoe4): في تحليل عرضي لـ2,192 بالغًا أستراليًا، ارتبطت نسبة الأطعمة فائقة المعالجة بانخفاض درجات الانتباه؛ ولم يتم العثور على علاقة واضحة للذاكرة ولم يمكن إثبات السببية. - [FDA اعترضت على مزاعم بائع شاي أخضر حول الزهايمر والقلق](https://nootropikler.com/ar/news/fda-warns-green-tea-seller-over-disease-treatment-claims): رسالة FDA في 2 يوليو اعترضت على الادعاءات بشأن الشاي الأخضر لعلاج الزهايمر وباركنسون والقلق؛ المسألة ليست تجربة فعالية جديدة، بل التسويق والموافقة الدوائية. - [تم دراسة الكيتونات المستمدة من MCT كوقود بديل للدماغ أثناء نقص سكر الدم.](https://nootropikler.com/ar/news/mct-ketones-hypoglycemia-working-memory-t1d): في دراسة صغيرة على البشر، كان نظام الكيتو الثلاثي متوسط السلسلة لمدة أربعة أسابيع مرتبطًا بدقة أفضل للذاكرة العاملة أثناء نقص السكر التحفيزي في داء السكري من النوع الأول؛ لم تتحسن سرعة الاستجابة. - [سلسلات ثيتا في الحُصين تتبع الأهداف التي تم تذكرها عند الفئران](https://nootropikler.com/ar/news/goal-directed-hippocampal-theta-navigation): لدى الجرذان التي تنقلت في ساحة مفتوحة، تنبأت سلاسل ثيتا في الحُصين مرتبطة بالتعلّم بالمسارات المؤدية إلى أهداف متذكَّرة، وتناسقت مع نشاط قشرة الفص الجبهي. تشير النتائج إلى دائرة محتملة للتخطيط، لكنها لا تثبت أن السلاسل تسبب التوجيه. - [تم العثور على مؤشرات ألزهايمر البيولوجية لدى الأشخاص في منتصف العمر في الجماعة مرتبطة بنتائج الاختبارات الإدراكية](https://nootropikler.com/ar/news/nih-midlife-alzheimer-biomarkers-cognition): أخبار NIH في يوليو تناولت دراسة رصدية ربطت بين مؤشرات الأميلويد والتاو في الدم والاختلافات الإدراكية في منتصف العمر ضمن مجموعة CARDIA. ## Nootropik News — Italiano - [Cambiamenti di umore e pensieri intrusivi erano collegati al ricordo delle azioni previste](https://nootropikler.com/it/news/affective-changes-intrusive-thoughts-prospective-memory): In 120 adulti, 117 sono stati inclusi nelle analisi della memoria prospettica. Umore e controllo dei pensieri intrusivi erano associati alla prestazione; i risultati non dimostrano un nesso causale né un trattamento per i problemi di memoria. - [Nature Neuroscience apre un numero speciale su neurotecnologia e interfacce cervello-computer](https://nootropikler.com/it/news/neurotechnology-special-issue-editorial-october-2026): Un editoriale del 1° ottobre introduce un numero speciale su come la neurotecnologia colleghi la ricerca sul cervello, i dispositivi assistivi e le questioni sulla governance dei dati; è una panoramica editoriale, non un nuovo esperimento. - [I modelli di connettività cerebrale differivano tra la patologia di Alzheimer e l'invecchiamento](https://nootropikler.com/it/news/alzheimer-connectivity-gradients-aging-biofinder-adni): Le analisi MRI in BioFINDER-2 e ADNI hanno collegato la patologia di Alzheimer e l'età a diversi gradienti di connettività della corteccia intera. I risultati della coorte descrivono associazioni e non stabiliscono un test diagnostico o un meccanismo causale. - [Un piccolo studio sulla miscela di ribes nero rileva cambiamenti selettivi dell'attenzione negli anziani](https://nootropikler.com/it/news/blackcurrant-theanine-pine-bark-attention-crossover): Studio crossover su 26 anziani dopo periodi di quattro settimane con miscela di ribes nero, L-teanina ed estratto di corteccia di pino o placebo. I falsi allarmi sono diminuiti; memoria e fatica non erano significative dopo correzione per confronti multipli. La miscela non isola un ingrediente. - [Un modello di apprendimento automatico ha stimato il futuro deterioramento cognitivo nella malattia di Parkinson](https://nootropikler.com/it/news/parkinsons-tabpfn-cognitive-impairment-prediction): Uno studio retrospettivo ha riportato AUC di 0,822 internamente e di 0,742 in una coorte esterna per un modello TabPFN. Gli autori affermano che è necessaria una validazione prospettica multicentrica prima dell'uso clinico. - [Le popolazioni di neuroni dell'ippocampo umano trasportano informazioni sul significato delle parole](https://nootropikler.com/it/news/human-hippocampus-distributed-semantic-code): Le registrazioni durante l'ascolto di narrazioni hanno collegato schemi di attività distribuita dell'ippocampo alla semantica delle parole, anche dopo che le analisi hanno tenuto conto di fonetica e grammatica. - [Un breve studio sul cardamomo nero segnala miglioramenti nei test di attenzione, con finanziamento industriale](https://nootropikler.com/it/news/black-cardamom-extract-short-attention-trial): Uno studio di 14 giorni ha randomizzato 96 adulti all'estratto di cardamomo nero, alla caffeina, alla loro combinazione o al placebo; 85 sono entrati nell'analisi finale. I guadagni dei test riportati necessitano di una replica indipendente e non stabiliscono un beneficio cognitivo duraturo. - [Uno studio sui topi collega la via dell'indolo batterico intestinale al danno da ictus e alla risposta immunitaria](https://nootropikler.com/it/news/gut-microbiota-indole-stroke-severity-immune-response): Nei topi, la segnalazione batterica dell'indolo ha influenzato l'attività immunitaria e il danno cerebrale dopo un ictus. In una coorte umana, l'abbondanza del gene batterico tnaA era associata a esiti peggiori; il meccanismo non è stato dimostrato nelle persone. - [Le registrazioni cerebrali hanno mappato segnali condivisi e distinti per il linguaggio immaginato e parlato](https://nootropikler.com/it/news/imagined-speech-neural-architecture-ecog): Le registrazioni ad alta densità durante la chirurgia in stato di veglia hanno trovato segnali di pianificazione condivisi e modelli sensomotori distinti per sillabe immaginate rispetto a quelle pronunciate, un risultato che potrebbe informare le future interfacce del linguaggio. - [La corrispondenza delle condizioni della maschera ha aiutato il riconoscimento in uno dei due esperimenti sulla memoria facciale](https://nootropikler.com/it/news/masked-face-recognition-context-congruency): Due esperimenti che utilizzavano immagini reali a bassa risoluzione hanno rilevato un beneficio di congruenza quando i volti mascherati sono stati codificati nel primo esperimento, ma non nel secondo. L'accuratezza complessiva è stata modesta. - [L'anestesia condivideva una firma di dinamica neurale tra sei specie](https://nootropikler.com/it/news/cross-species-neural-dynamics-under-anesthesia): Un'analisi di registrazioni cerebrali in sei specie ha rilevato scale temporali neurali locali più brevi e una sincronizzazione interregionale più debole sotto anestesia; la stimolazione talamica ha invertito il quadro nei macachi. - [L'uso della televisione e del computer ha mostrato collegamenti opposti con la cognizione negli anziani](https://nootropikler.com/it/news/screen-time-types-and-cognition-older-adults): In quattro coorti di anziani, più tempo davanti alla TV era associato a punteggi cognitivi più bassi, mentre l'uso del computer era associato a punteggi più alti. Le analisi di randomizzazione mendeliana sostenevano queste associazioni, ma dipendono dalle relative assunzioni. - [Stimolatore radioalimentato senza batteria funzionante in topi in movimento libero](https://nootropikler.com/it/news/wireless-rf-neurostimulation-freely-moving-mice): Uno studio su animali e dispositivi ha testato uno stimolatore transcranico wireless alimentato da onde radio radiative; ha mantenuto la potenza attraverso una gabbia e ha indotto movimenti circolari quando mirato a una regione motoria. - [L'incertezza nell'ambiente ha ridotto lo sforzo di pianificazione in un compito umano ](https://nootropikler.com/it/news/environmental-stochasticity-reduces-human-planning-effort): Attraverso tre forme di incertezza ambientale, i partecipanti pianificavano meno, rispondevano più rapidamente e utilizzavano politiche decisionali più semplici, meno sensibili ai valori delle opzioni. - [Lo studio non ha trovato differenze rilevabili di APOE ε4 nella cognizione tra giovani adulti sani](https://nootropikler.com/it/news/apoe4-young-adult-cognition-navigation-null): Tra 1.000 adulti sani di età compresa tra 18 e 35 anni, i portatori di ε3ε4 non differivano in modo rilevabile dai portatori di ε3ε3 nelle capacità di orientamento o in diversi compiti cognitivi. Il risultato si applica a questo campione e a questa fascia di età. - [Gli strati corticali sono cambiati in modo diverso mentre i topi imparavano un compito dei baffi](https://nootropikler.com/it/news/cortex-wide-laminar-dynamics-learning-mice): L'imaging a campo ampio in 25 aree corticali ha rilevato cambiamenti distinti, talvolta opposti, nell'attività degli strati 2/3 e 5 mentre i topi maschi imparavano un compito basato sui baffi. Lo studio mappa le dinamiche legate all'apprendimento ma non isola tutti i contributi causali. - [Microbiota intestinale e acido indolo-3-lattico collegati al recupero cognitivo nello studio su deficit vascolare](https://nootropikler.com/it/news/gut-ila-axis-vascular-cognitive-impairment): Una coorte clinica e esperimenti su topi hanno collegato il metabolismo microbico del triptofano alla cognizione e alla funzione glinfatica. Le osservazioni cliniche erano esplorative; le prove di intervento provenivano dai topi. - [La via dall’amigdala allo striato modula il comportamento ripetitivo nei topi](https://nootropikler.com/it/news/amygdala-striatum-circuit-repetitive-behavior-mice): Uno studio sui topi ha mappato una proiezione diretta dall'amigdala allo striato dorsolaterale, che modulava la toelettatura evocata da uno stimolo ed era rafforzata in un modello di toelettatura compulsiva. È un risultato sui circuiti cerebrali animali, non una prova di cause o trattamenti nell'uomo. - [Piccole biopsie del cervello vivente offrivano una vista diretta della patologia dell’Alzheimer](https://nootropikler.com/it/news/alzheimer-pathology-living-brain-biopsy-proteomics): In 18 persone sottoposte a chirurgia di derivazione per sospetto idrocefalo a pressione normale, i ricercatori hanno trovato placche amiloidi in nove biopsie e hanno mappato la chimica delle placche e il ricambio della tau. Il campione chirurgico selezionato limita la generalizzazione. - [L’atlante sostenuto dal NIH mappa gli stati cellulari nei disturbi cerebrali](https://nootropikler.com/it/news/nih-single-cell-atlas-brain-disorders): NIH ha annunciato mappe molecolari costruite da oltre 6,3 milioni di nuclei cellulari e 1.494 donatori, fornendo una risorsa di ricerca per l'Alzheimer e i disordini cerebrali correlati. - [I macachi rhesus hanno regolato la velocità decisionale in modi legati all'accuratezza](https://nootropikler.com/it/news/macaques-metacognitive-control-decision-accuracy): In un compito a due scelte, le scimmie rhesus erano più accurate nelle risposte veloci anche dopo aver tenuto conto della difficoltà. Un modello di monitoraggio potrebbe spiegare il modello, anche se non prova direttamente la fiducia soggettiva. - [L'analisi dei biomarcatori COSMOS non rileva effetti a due anni da multivitaminici o estratto di cacao](https://nootropikler.com/it/news/cosmos-multivitamin-cocoa-neurodegeneration-biomarkers): In uno studio sussidiario randomizzato su adulti anziani, né un multivitaminico né l'estratto di cacao hanno modificato tre biomarcatori del sangue nell'arco di due anni rispetto al placebo. Questi risultati sui biomarcatori non stabiliscono se gli integratori influenzino la cognizione attraverso altri percorsi. - [La stimolazione a interferenza temporale ha modificato le scelte sullo sforzo mentale in uno studio umano](https://nootropikler.com/it/news/temporal-interference-stimulation-mental-effort): In un piccolo esperimento con adulti sani, la stimolazione a interferenza temporale ha modificato il modo in cui i partecipanti valutavano ricompense e sforzo cognitivo, insieme a cambiamenti nei segnali dello striato e del cingolo. - [Le stime dell'attenzione visiva non erano chiaramente intercambiabili tra due compiti](https://nootropikler.com/it/news/visual-attention-estimates-depend-on-task): Trenta partecipanti hanno completato due compiti di attenzione visiva. Le stime hanno avuto in media 58 Hz in uno e 49 Hz nell'altro, ma le analisi non hanno stabilito una differenza chiara o uguaglianza. - [In un piccolo studio su MCI, la dieta in stile MIND è stata associata a punteggi cognitivi migliori](https://nootropikler.com/it/news/mind-based-diet-mci-cluster-rct-korea): In uno studio coreano a etichetta aperta di 12 settimane su 80 adulti con MCI, entrambi i gruppi della dieta MIND con pasti forniti hanno migliorato i punteggi K-MMSE2 rispetto al controllo; l'abstract non indica alcuna dimensione dell'effetto. - [Una piccola coorte umana associa inquinanti, microbi intestinali e misure dell’attenzione](https://nootropikler.com/it/news/pah-gut-microbiome-attention-impulsivity-cohort): Tra 34 adulti, l’esposizione misurata agli idrocarburi policiclici aromatici, i profili del microbioma e i gruppi neurocomportamentali variavano insieme. Nessun genere microbico è rimasto associato al gruppo comportamentale dopo la correzione statistica; i possibili collegamenti restano esplorativi. - [Segnali reciproci della corteccia visiva hanno aiutato le aree cerebrali del topo a concordare](https://nootropikler.com/it/news/reciprocal-visual-cortex-connections-consensus): Registrazioni nei topi, perturbazioni optogenetiche e modelli di circuiti hanno indicato che le connessioni reciproche V1–LM prolungano l'attività visiva congruente risolvendo segnali incoerenti. La scoperta riguarda un compito visivo semplice e un'interpretazione basata su modelli. - [Un programma combinato di prisma e gioco ha migliorato alcuni punteggi cognitivi post-ictus](https://nootropikler.com/it/news/mindlenses-poststroke-cognitive-rehabilitation-trial): In uno studio randomizzato su 60 persone con ictus, un dispositivo di adattamento al prisma e gioco su tablet ha migliorato la memoria a partire da tre mesi e il linguaggio nelle verifiche post-trattamento rispetto alla riabilitazione standard. - [Fatica e velocità di elaborazione hanno predetto l’influenza della fatica sulle prestazioni](https://nootropikler.com/it/news/fatigue-processing-speed-override-daily-life): Un’analisi di sei studi nella vita quotidiana ha rilevato che, nelle ore successive, una fatica superiore al solito e una maggiore velocità di elaborazione erano associate a un legame più forte tra fatica e prestazione, interpretato dagli autori come minore capacità di compensare la fatica. - [La FDA estende l'allarme sull'oleandro giallo tossico ai prodotti Niwali e Easy Forte](https://nootropikler.com/it/news/fda-yellow-oleander-niwali-easy-forte-alert): La FDA ha aggiunto Niwali Tejocote Pieces, Niwali Tejocote Capsules ed Easy Forte Natural Fiber a un avviso di sicurezza dopo che i test hanno rilevato oleandro giallo tossico. Raccomanda di interrompere l’uso e contattare un professionista sanitario. - [Gli astrociti hanno formato sequenze di attività temporizzata durante il richiamo della memoria nei topi](https://nootropikler.com/it/news/hippocampal-astrocyte-sequences-memory-mice): L’imaging nei topi ha rilevato sequenze di calcio negli astrociti CA1 compresse durante il condizionamento della paura e la loro ricomparsa nel contesto condizionato. Le registrazioni sono correlazionali e non mostrano che gli astrociti creino o siano necessari per la memoria. - [Profilo dei metaboliti nel sangue collegato all'adesione alla dieta mediterranea con alcune misure cognitive selezionate](https://nootropikler.com/it/news/mediterranean-diet-metabolite-signature-cognition-cohorts): Uno studio a due coorti ha derivato una firma ematica di 23 metaboliti associata all’aderenza alla dieta mediterranea e ad alcune misure cognitive. Il trasferimento alla seconda coorte è stato debole fino a quando il modello non è stato ricalibrato, e lo studio era osservazionale. - [I cambiamenti della memoria di riconoscimento hanno seguito la progressione in una coorte di Alzheimer precoce](https://nootropikler.com/it/news/alzheimer-recognition-memory-progression-cohort): Uno studio di 24 mesi su 278 anziani con lieve deterioramento cognitivo amnestico ha rilevato che una minore discriminabilità nel riconoscimento e un declino precoce prevedevano la conversione alla demenza di Alzheimer dopo aggiustamento per altre misure. - [Le cellule cerebellari hanno tracciato le ricompense da stimolazioni neuronali ritardate nei topi](https://nootropikler.com/it/news/cerebellar-dopamine-reward-prediction-mice): Nei topi, le cellule granulari del cervelletto prevedevano ricompense ritardate dopo la stimolazione dei neuroni dopaminergici o del fascio prosencefalico mediale; le fibre rampicanti rispondevano più tardi. Le perturbazioni sostengono un ruolo in questo compito, senza dimostrare effetti sulla cognizione umana. - [Lo svantaggio sociale è stato associato a valutazioni persistentemente più basse della memoria autopercepita in una grande coorte](https://nootropikler.com/it/news/social-disadvantage-subjective-memory-longitudinal-cohort): Tra 14.938 adulti cinesi di almeno 45 anni, distribuiti su sei rilevazioni, lo svantaggio sociale cumulativo era associato a una memoria autovalutata persistentemente più bassa, debolmente correlata alla cognizione oggettiva. - [Gli algoritmi adattativi di interfaccia cervello-computer hanno rimodellato l'apprendimento neuronale nelle scimmie](https://nootropikler.com/it/news/assistive-algorithms-shape-bci-learning): Registrazioni longitudinali e un modello di rete neurale suggeriscono che i decoder BCI adattivi concentravano le informazioni del compito in un numero minore di segnali neurali durante la pratica, a differenza dei decoder fissi. - [Efficienza del sonno, piuttosto che durata, ha monitorato i punteggi esecutivi per due anni](https://nootropikler.com/it/news/sleep-efficiency-executive-function-repeated-cohort): Tra 233 adulti di età pari o superiore a 55 anni, una maggiore efficienza del sonno misurata con dispositivi indossabili era associata a una migliore funzione esecutiva, mentre la durata del sonno e la qualità auto-valutata non mostravano alcun legame significativo con i domini cognitivi. - [Un impianto cerebrale ha decodificato insieme discorsi e gesti in uno studio sulla paralisi](https://nootropikler.com/it/news/speech-gesture-paralysis-brain-computer-interface): Uno studio con tre partecipanti ha utilizzato un impianto corticale per decodificare discorsi e gesti tentati, mostrando una prova di concetto per una comunicazione più naturale tramite un'interfaccia cervello-computer. - [Codici ippocampali ventrali sovrapposti hanno seguito il recupero rapido dei ricordi di paura nei topi](https://nootropikler.com/it/news/ventral-hippocampus-overlapping-fear-memory-codes): L'imaging del calcio nei topi ha rilevato che l'apprendimento della paura rendeva le rappresentazioni dei contesti minacciosi e neutrali più simili nel CA1 ventrale, dove l'attività correlata alla minaccia ritornava rapidamente durante il recupero. - [L'apprendimento della paura ha modificato le sinapsi inibitorie in parti distinte dei neuroni CA1 del topo](https://nootropikler.com/it/news/ca1-inhibitory-synapses-remodel-with-fear-learning): L'imaging longitudinale ha rilevato che il condizionamento della paura minima ha riorganizzato le sinapsi inibitorie dendritiche ma ha stabilizzato quelle al segmento iniziale dell'assone dei neuroni piramidali dell'ippocampo. - [La revisione valuta le evidenze osservazionali sulla colina alimentare e la cognizione](https://nootropikler.com/it/news/dietary-choline-cognition-observational-evidence-review): Una revisione sistematica e una meta-analisi dose-risposta hanno valutato studi osservazionali sul colina nella dieta e sugli esiti cognitivi. Le prove riguardano le associazioni negli studi esistenti, non se gli integratori di colina prevengano il declino. - [L'insicurezza alimentare e lo stress erano associati a differenze nelle attività cognitive negli studenti universitari](https://nootropikler.com/it/news/food-insecurity-stress-college-student-cognition): Uno studio trasversale su 230 studenti universitari ha collegato l'insicurezza alimentare e lo stress con differenze nei compiti di attenzione, presa di decisione e abbinamento della memoria. Queste associazioni non possono stabilire che l'accesso al cibo abbia causato i punteggi. - [La meta-analisi trova modesti segnali cognitivi dalle diete chetogeniche, con compromessi lipidici](https://nootropikler.com/it/news/ketogenic-diet-cognitive-impairment-meta-analysis): Una revisione di 12 studi ha trovato segnali cognitivi complessivi negli anziani con compromissione insieme a livelli più alti di colesterolo totale e LDL-C. - [Gli studi sull'esercizio fisico evidenziano modelli di attivazione cerebrale distinti per la memoria di lavoro](https://nootropikler.com/it/news/exercise-working-memory-fmri-meta-analysis): Una meta-analisi basata sulla probabilità di attivazione di 11 studi fMRI ha rilevato cambiamenti di attivazione parzialmente diversi dopo interventi di esercizio e in soggetti che praticano esercizio a lungo termine. La limitata base di evidenze rende le mappe esplorative. - [La stimolazione vicino al nervo ha mostrato promettenti risultati come misura EEG in uno studio sulla coscienza di piccole dimensioni](https://nootropikler.com/it/news/near-nerve-stimulation-consciousness-assessment): Un pilota monocentrico ha confrontato la stimolazione nervosa con la stimolazione cutanea in 19 persone con disturbi di coscienza prolungati; gli autori chiedono una validazione esterna della misura basata sull'EEG. - [Uno studio post-COVID riporta collegamenti tra microbi intestinali e misure di imaging cerebrale](https://nootropikler.com/it/news/post-covid-gut-microbiome-brain-imaging-associations): Uno studio trasversale di piccole dimensioni ha associato i modelli di microbiota intestinale con sintomi e misure di risonanza magnetica nella condizione post-COVID. Non dimostra che il microbioma abbia causato cambiamenti cerebrali o sintomi. - [Tau frontale è stato associato a onde del sonno disturbate e memoria peggiore.](https://nootropikler.com/it/news/frontal-tau-linked-to-disrupted-sleep-waves-and-memory): Attraverso coorti di adulti anziani utilizzando PET tau, EEG e marker del liquido cerebrospinale, un tau frontale più elevato era associato a onde lente del sonno meno diffuse e a una memoria notturna peggiore. - [La solitudine persistente è stata associata a una peggiore salute in una coorte di adulti anziani](https://nootropikler.com/it/news/loneliness-isolation-trajectories-older-adult-health): Un'analisi longitudinale su 4.090 adulti inglesi ha collegato la solitudine cronica a una peggiore salute fisica e mentale. Porre fine all'isolamento è stato associato a una migliore cognizione, ma i dati osservazionali non possono stabilire causa ed effetto. - [Una coorte a lungo termine separa la patologia di Alzheimer dalla resilienza cognitiva](https://nootropikler.com/it/news/alzheimer-pathology-cognitive-resilience-longitudinal-risk): In 3.119 anziani seguiti per una mediana di 13,7 anni, la patologia e una misura derivata di resilienza cognitiva tracciavano indipendentemente il rischio di demenza; l'analisi osservazionale non dimostra causalità. - [La sete durante il ciclismo in clima caldo ha influenzato i punteggi di concentrazione, non quelli dei test esecutivi](https://nootropikler.com/it/news/thirst-satiation-heat-exercise-executive-function): In 12 uomini, acqua e soluzione salina endovenosa hanno prodotto un'idratazione simile, ma la soluzione salina ha lasciato i partecipanti più assetati e più sotto stress termico; i punteggi del test flanker e dell'umore non differivano. - [L'apprendimento degli odori ha riorganizzato le rappresentazioni neurali nei pesci zebra](https://nootropikler.com/it/news/odor-learning-reorganizes-brain-representations-in-zebrafish): Nei pesci zebra giovani e adulti, l'addestramento a discriminare gli odori ha aumentato la separazione degli schemi neurali rilevanti per il compito nell'area pDp. Questa geometria rappresentazionale era associata alle prestazioni individuali. - [L'interferenza delle caratteristiche era collegata agli errori decisionali quando i segnali del compito erano incerti](https://nootropikler.com/it/news/feature-interference-cost-of-task-uncertainty): Il comportamento umano, le registrazioni di V1 delle scimmie e la modellizzazione hanno collegato l'incertezza su quale compito percettivo eseguire con una codifica più forte di caratteristiche irrilevanti e rappresentazioni neurali meno distinte. - [Rari neuroni inibitori corticali hanno promosso l’attività sincronizzata e il sonno nei topi](https://nootropikler.com/it/news/cortical-sst-chodl-neurons-promote-sleep-mice): L'attivazione selettiva dei neuroni inibitori di Sst-Chodl ha promosso la sincronia corticale e il sonno nei topi. La pubblicazione sulla rivista di settembre estende la ricerca sui circuiti precedentemente disponibile come prestampa; non stabilisce un trattamento del sonno umano. - [Il design di elettrodi submicron indipendenti mira a registrazioni flessibili sulla superficie del cervello](https://nootropikler.com/it/news/submicron-ecog-electrode-array): Gli ingegneri hanno riportato un sottile array di elettrocorticografia autonomo ispirato alla struttura delle ali delle libellule, affrontando un compromesso di materiali rilevante per le future interfacce cervello-computer. - [Il processo mitocondriale legato alla tau ha ridotto i deficit nei modelli animali. ](https://nootropikler.com/it/news/nih-tau-mitochondria-reverse-electron-transport): NIH ha evidenziato esperimenti che collegano la tau alterata al trasporto elettronico inverso mitocondriale; bloccare quel percorso ha aiutato i modelli, non i pazienti in una sperimentazione clinica. - [Il programma di riabilitazione per il Parkinson della comunità è stato seguito da punteggi migliori nei test cognitivi](https://nootropikler.com/it/news/parkinsons-pd-core-cognitive-rehabilitation): In uno studio pre–post su 45 persone, un programma di gruppo di sette sessioni è stato seguito da miglioramenti nei test di cognizione globale e giudizio pratico. Senza un gruppo di controllo, lo studio non può separare gli effetti del trattamento dagli effetti della pratica o da altri cambiamenti. - [Un profilo di salute multidominio ha monitorato l'invecchiamento cognitivo in tre coorti. ](https://nootropikler.com/it/news/intrinsic-capacity-profile-cognitive-aging-three-cohorts): In 26.022 adulti in tre coorti di invecchiamento, le compromissioni in domini di salute non cognitivi erano associate a punteggi cognitivi più bassi e a un maggiore rischio di compromissione cognitiva successiva. - [Lo studio collega pisolini più lunghi con una velocità di elaborazione più lenta negli adulti anziani](https://nootropikler.com/it/news/pointer-zzz-napping-apnea-cognition): Un'analisi di base su 686 partecipanti anziani statunitensi di POINTER ha associato sonnellini diurni più lunghi a una velocità di elaborazione più lenta; non sono stati stabiliti causalità né un'interazione con l'apnea. - [La coorte del Regno Unito Biobank collega la densità di niacina nella dieta con la cognizione e il rischio di demenza](https://nootropikler.com/it/news/niacin-diet-density-cognition-dementia-cohort): Un grande studio di coorte della popolazione ha esaminato gli equivalenti di niacina nella dieta in relazione alla funzione cognitiva e all’insorgenza della demenza; il suo disegno osservazionale non può dimostrare che un aumento della niacina prevenga il declino. - [L'analisi multi-omica propone candidati biomarcatori del Parkinson collegati alle fasi](https://nootropikler.com/it/news/parkinsons-proteo-metabolomic-stage-biomarkers): Un'analisi secondaria dei dati dell'Iniziativa sui Marker di Progressione del Parkinson ha combinato proteine e metaboliti del CSF e del plasma per identificare marker candidati. I risultati ottenuti con l'apprendimento automatico sono esplorativi e necessitano di una convalida clinica indipendente. - [SUPPLX richiama due prodotti dopo la scoperta di yohimbina non dichiarata](https://nootropikler.com/it/news/fda-recalls-products-undeclared-yohimbine): SUPPLX ha richiamato volontariamente Business Pill e Branch Manager for Men dopo che i test hanno identificato yohimbina non dichiarata; la FDA ha pubblicato l'avviso il 4 settembre. - [Memorie distinte erano collegate a un'attenzione visiva più precisa](https://nootropikler.com/it/news/distinct-memories-help-focus-on-visual-targets): In un compito umano di ricerca visiva con fMRI e eye-tracking, schemi di memoria ippocampale più distinti erano associati a movimenti oculari guidati dalla memoria più accurati e a una minore attivazione dei concorrenti. - [La pratica strutturata precoce ha plasmato l'apprendimento flessibile nei topi.](https://nootropikler.com/it/news/structured-practice-shaped-flexible-learning-in-mice): Nei topi che imparavano un compito di temporizzazione, esempi iniziali strutturati hanno supportato strategie successive più flessibili e l'attività entorinale correlata al compito; lo studio ha anche testato le previsioni di un modello di rete neurale. - [Un piccolo studio controllato con placebo in persone con Alzheimer rileva miglioramenti cognitivi dopo la stimolazione cerebellare](https://nootropikler.com/it/news/alzheimer-cerebellar-rtms-fnirs-rct): In uno studio randomizzato su 33 persone, due settimane di rTMS cerebellare sono state seguite da una migliore cognizione globale rispetto allo sham fino alla settimana 12. I cambiamenti fNIRS erano misure emodinamiche, non registrazioni dirette dell'attività neurale. - [Un'indagine europea collega il sonno molto lungo e i pisolini diurni con il deterioramento cognitivo](https://nootropikler.com/it/news/european-sleep-duration-cognition-share-analysis): Un'analisi trasversale di 88.889 interviste SHARE ha associato il sonno di almeno 10 ore e i pisolini diurni a una minore cognizione; non può stabilire se i modelli di sonno causino il deterioramento. - [Due aree parietali del topo hanno mostrato ruoli distinti nei compiti visivi e di scelta](https://nootropikler.com/it/news/mouse-parietal-cortex-functional-architecture): L'imaging mesoscopico di migliaia di neuroni di topo ha rilevato che le aree parietali mediali AM e A rappresentavano in modo diverso informazioni visive/di scelta e storia della scelta/postura. Lo studio mappa l'organizzazione funzionale; non stabilisce che queste aree da sole causino i comportamenti. - [Il semaglutide nella tarda età ha migliorato le misure della memoria nei topi; gli effetti sull'uomo rimangono sconosciuti](https://nootropikler.com/it/news/nih-semaglutide-late-life-mice-cognition): Uno studio su topi riportato dall'NIH ha rilevato che la semaglutide tardiva migliorava le misure della memoria spaziale; la rilevanza clinica per le persone non è stata stabilita. - [I biomarcatori dell’Alzheimer hanno identificato un sottogruppo di Parkinson con un declino più rapido](https://nootropikler.com/it/news/parkinsons-alzheimer-biomarker-cognitive-profiles): In una coorte prospettica, 42 dei 449 partecipanti con biomarcatori positivi per il Parkinson hanno soddisfatto i criteri per i biomarcatori dell’Alzheimer e successivamente hanno mostrato un maggiore declino cognitivo e motorio. Il risultato osservazionale è prognostico, non causale. - [La concentrazione di glutammato ha modificato gli stati di segnalazione dei recettori AMPA alle sinapsi dei topi](https://nootropikler.com/it/news/glutamate-levels-tune-ampa-receptor-conductance): Esperimenti sulle sinapsi degli interneuroni nei topi hanno rilevato che una minore esposizione al glutammato cambiava le proprietà dei recettori AMPA attraverso l'occupazione di diversi stati di conduttanza. - [Lo studio mappa più regni di microbi intestinali nella depressione maggiore e nella cognizione](https://nootropikler.com/it/news/multi-kingdom-gut-microbiome-depression-cognition): Uno studio su 121 giovani adulti con depressione al primo episodio e 117 controlli ha riscontrato differenze tra segnali batterici, virali, fungini e archeali. Il suo design trasversale non può stabilire se i cambiamenti del microbioma causino depressione o differenze cognitive. - [Un metodo di brain imaging ha mappato come il flusso del segnale corticale cambia con lo stato mentale.](https://nootropikler.com/it/news/human-cortical-signal-flow-hierarchy-changes-with-state): Un quadro di connettività efficace validato ha inferito una gerarchia corticale umana che si appiattiva durante la elaborazione focalizzata esternamente e si accentua durante stati focalizzati internamente. - [Modello AI ha ricostruito segnali cerebrali profondi da registrazioni corticali per ricerche sul DBS](https://nootropikler.com/it/news/deep-learning-subcortical-signal-reconstruction-dbs): Un'analisi multicentrica delle registrazioni di persone con disturbi del movimento ha testato se un modello generativo potesse inferire l'attività subcorticale dai segnali corticali per aiutare a colmare le lacune nei dati di stimolazione a circuito chiuso. - [Studi sul supporto alimentare in gravidanza riportano differenze nelle strutture cerebrali fetali](https://nootropikler.com/it/news/mikhuna-prenatal-diet-fetal-brain-growth): In uno studio randomizzato in Ecuador su 215 gravidanze, un programma di diversità alimentare è stato associato a differenze di crescita in diverse strutture cerebrali fetali; lo studio ha misurato l'anatomia, non la cognizione successiva. - [Studio sui probiotici nel deficit cognitivo iniziale che esamina la cognizione e i marker tau](https://nootropikler.com/it/news/multistrain-probiotics-early-cognitive-impairment): Uno studio randomizzato di 24 settimane su 87 persone con lieve compromissione cognitiva ha rilevato livelli più bassi di pTau181 e segnali visuo-spaziali selettivi, ma nessuna differenza nei punteggi MMSE, di memoria verbale o esecutiva. - [Come il richiamo di un ricordo ha lasciato una traccia nell'attività cerebrale successiva](https://nootropikler.com/it/news/recalling-a-memory-leaves-a-trace-in-brain-activity): In un esperimento di fMRI, i richiami di memoria hanno modellato successivamente i modelli neurali per le coppie immagine-parola apprese, anche se i partecipanti hanno ottenuto risultati simili nel test di memoria. - [I ritmi theta possono contrassegnare ricordi per la consolidazione durante il sonno ](https://nootropikler.com/it/news/theta-rhythms-may-mark-memories-for-sleep-consolidation): In 31 giovani adulti, l'EEG durante l'apprendimento parola-oggetto ha collegato una maggiore attività theta con un successivo accoppiamento delle onde del sonno e la conservazione della memoria dopo un pisolino; l'associazione non stabilisce causalità. - [La FDA avverte contro il glutatione di grado supplementare nei composti iniettabili. ](https://nootropikler.com/it/news/fda-glutathione-injection-quality-alert): La FDA ha segnalato eventi avversi in almeno 30 pazienti dopo la somministrazione endovenosa di glutatione preparato in farmacia e ha avvertito di non usare materiale di qualità da integratore per le iniezioni. - [Il rapporto NIH descrive differenze nel ripiegamento del DNA durante l'invecchiamento e l'Alzheimer](https://nootropikler.com/it/news/nih-dna-organization-alzheimers-aging): Un rapporto dell'NIH ad agosto ha evidenziato modifiche nei contatti del DNA e nell'attività genica nelle cellule prefrontali post-mortem di donatori con Alzheimer; lo studio non stabilisce la causalità. - [La stimolazione spinale aggiunta all’allenamento sul tapis roulant ha avuto effetti limitati sulla deambulazione nel Parkinson. ](https://nootropikler.com/it/news/parkinson-spinal-magnetic-stimulation-treadmill-trial): Uno studio randomizzato su 70 persone con Parkinson ha trovato segnali a breve termine nella velocità di camminata e, più tardi, negli episodi di freezing della marcia dalla combinazione di stimolazione e allenamento su tapis roulant, ma nessun vantaggio complessivo sostenuto. - [La glutammina non ha modificato l'umore o la cognizione durante una breve esposizione simulata ad alta quota.](https://nootropikler.com/it/news/glutamine-hypoxia-cognition-rct): In uno studio randomizzato su giovani uomini, sei ore di ipossia simulata a 4.500 m non hanno alterato le misure psicobiologiche e l'integrazione di glutammina non ha prodotto un beneficio rilevabile. - [Lo studio sulle arachidi non rileva benefici significativi sulla cognizione o sull'attivazione cerebrale](https://nootropikler.com/it/news/peanut-consumption-memory-complaints-rct): Una sperimentazione di 12 settimane sulle arachidi in 27 anziani con disturbi della memoria non ha evidenziato differenze significative di gruppo nella cognizione, nell'attivazione cerebrale o nei biomarcatori corretti. - [I neuroni responsivi alla veglia hanno aiutato a regolare la spinta al sonno nei topi](https://nootropikler.com/it/news/wake-history-neurons-regulate-sleep-drive-in-mice): Manipolare i neuroni responsivi al risveglio nei topi ha alterato il sonno NREM e la pressione del sonno, identificando circuiti candidati per la regolazione del sonno senza dimostrare che la riduzione del sonno sia sicura. - [Gli organoidi cerebrali a lunga vita mostrano caratteristiche di uno sviluppo umano avanzato](https://nootropikler.com/it/news/nih-brain-organoids-long-term-maturation): Il NIH ha riportato che gli organoidi cerebrali derivati da cellule staminali sono maturati per quasi sei anni, con l'età molecolare che tracciava il tempo trascorso; questi sono modelli di laboratorio. - [Il cervello del topo ha riutilizzato componenti neurali nelle operazioni cognitive](https://nootropikler.com/it/news/reusable-modular-cognition-mouse-brain): Nel compito di corrispondenza ritardata, i topi hanno riutilizzato sottospazi neurali prefrontali e parietali per elaborare stimoli e mantenere informazioni in memoria. I modelli sostengono un’organizzazione modulare, ma il risultato riguarda un solo compito e non dimostra moduli cognitivi umani. - [La FDA aggiorna un avviso di importazione esistente sul kratom con un ingresso del fornitore di agosto](https://nootropikler.com/it/news/fda-adds-kratom-supplements-to-import-detention-alert): La versione del 17 agosto dell'FDA Import Alert 54-15 include un nuovo fornitore elencato; il suo meccanismo di detenzione del kratom precede il 2026 e si applica a importazioni specifiche. - [La dieta mediterranea modifica i marcatori metabolici in un'analisi provvisoria della MCI](https://nootropikler.com/it/news/mediterranean-diet-metabolomics-mci-interim): In 47 anziani con lieve compromissione cognitiva, un intervento di 24 settimane con dieta mediterranea ha modificato diversi metaboliti plasmatici; alcune modifiche dei metaboliti erano correlate con i punteggi cognitivi. La correlazione non stabilisce un beneficio cognitivo. - [Lo studio sulla dieta mediterranea ricca di proteine riporta differenze modeste nei punteggi cognitivi](https://nootropikler.com/it/news/promed-protein-mediterranean-exercise-cognition): Uno studio di sei mesi su 105 anziani a rischio di malnutrizione e declino cognitivo ha riscontrato un miglioramento dello stato nutrizionale e piccole differenze nei punteggi neurocognitivi nei gruppi con consulenza dietetica rispetto al controllo con opuscolo. - [Lo studio sul pane a base di fibre prebiotiche si concentra sulla fattibilità e sulla cognizione negli adulti anziani ](https://nootropikler.com/it/news/prebiotic-fibre-bread-older-adults-feasibility): Uno studio di fattibilità ha testato un pane che fornisce 10 g/giorno in più di fibra prebiotica in adulti anziani con un’assunzione abituale di fibra bassa; è stato progettato per valutare la fattibilità e i risultati preliminari. - [Tracce mnemoniche persistono attraverso l'ibernazione artificiale nei topi](https://nootropikler.com/it/news/memory-traces-persist-after-artificial-hibernation-in-mice): Dopo l'ibernazione indotta nei topi, alcuni ricordi sono rimasti nonostante la perdita di più della metà delle sinapsi ippocampali; le connessioni legate ai ricordi e raggruppate sono state preferenzialmente conservate. - [Un piccolo studio associa i plasmalogeni derivati dalle capesante a punteggi migliori nella memoria verbale](https://nootropikler.com/it/news/scallop-plasmalogens-verbal-memory-rct): Uno studio di 12 settimane su 68 adulti giapponesi selezionati ha riportato un piccolo segnale di memoria verbale per i plasmalogeni derivati dalle capesante; gli effetti a lungo termine rimangono sconosciuti. - [TIMP2 ha alterato gli stati microgliali legati all'età nei topi](https://nootropikler.com/it/news/timp2-microglia-aging-mouse-brain): La delezione di TIMP2 ha peggiorato diverse misure microgliali associate all'età nei topi, mentre il trattamento nei topi anziani ha modificato i profili infiammatori e la fagocitosi. Questi risultati preclinici non mostrano benefici cognitivi né stabiliscono un intervento sicuro per l'uomo. - [L'annuncio dell'UW evidenzia un metabolita intestinale legato a cambiamenti correlati all'Alzheimer.](https://nootropikler.com/it/news/gut-imidazole-propionate-alzheimer-announcement): Un annuncio dell'Università del Wisconsin ha descritto un metabolita batterico intestinale associato alla cognizione nelle persone e a cambiamenti simili all'Alzheimer in modelli sperimentali; l'articolo stesso è stato pubblicato il 26 giugno. - [Uno studio di dodici settimane sulla creatina riporta indicatori cognitivi esplorativi insieme ai cambiamenti di forza](https://nootropikler.com/it/news/creatine-cognition-middle-aged-older-adults-rct): Uno studio della durata di 12 settimane sulla creatina, condotto su 64 partecipanti completanti, ha descritto i risultati cognitivi come esplorativi, mentre la partecipazione a esercizio fisico e dieta era auto-selezionata. - [La plasticità endocannabinoide ha supportato l'apprendimento rapido nei topi](https://nootropikler.com/it/news/striatal-endocannabinoids-one-shot-learning-mice): Un breve contatto con del nastro adesivo ha indotto in seguito l'evitamento nei topi e una plasticità cortico-striatale; interrompere la via endocannabinoide ha compromesso l'apprendimento. Il nuovo compito di avversione è un modello animale, non una prova di miglioramento della memoria umana. - [Uno studio pilota associa meditazione ed esercizi di respirazione a una riduzione dell'ansia nel Parkinson](https://nootropikler.com/it/news/parkinson-meditation-breathwork-anxiety-pilot-trial): In un piccolo studio pilota randomizzato, sei settimane di meditazione e esercizi di respirazione a distanza hanno ridotto l'ansia correlata al Parkinson rispetto a un gruppo in lista d'attesa; lo studio si è concentrato sull'ansia, non sulla cognizione. - [Lo studio sui tessuti cerebrali umani collega l'alterata immagazzinazione del glucosio con la patologia di Alzheimer. ](https://nootropikler.com/it/news/brain-glucose-glycogen-alzheimer-human-brains): Uno studio su 230 cervelli post-mortem ha collegato strutture correlate al glicogeno con la patologia tau dell'Alzheimer, inclusi cambiamenti osservati nelle prime fasi patologiche. L'analisi dei tessuti non può stabilire quali cambiamenti siano avvenuti per primi o se modificare la dieta sarebbe utile. - [L'allenamento cognitivo digitale ha migliorato i punteggi esecutivi in un piccolo studio RBD](https://nootropikler.com/it/news/cogtrail-rbd-cognitive-training-executive-function): In 82 persone con disturbo comportamentale del sonno REM isolato, un programma di cinque settimane di allenamento cognitivo digitale e guida sullo stile di vita è stato collegato a modesti miglioramenti delle funzioni esecutive rispetto a un gruppo in lista di attesa. - [Un microscopio olografico ha permesso ai ricercatori di sondare la comunicazione tra le aree cerebrali.](https://nootropikler.com/it/news/two-photon-holographic-mesoscope-neural-circuits): Un nuovo sistema a due fotoni ha stimolato neuroni selezionati di topo in un campo su scala millimetrica mentre osservava le risposte a valle. Supporta esperimenti sui circuiti tra diverse aree; rimane uno strumento di ricerca specializzato, non un'applicazione per l'uomo. - [La riabilitazione dopo una terapia avanzata per il Parkinson ha mostrato un possibile segnale cognitivo](https://nootropikler.com/it/news/parkinson-device-aided-therapy-rehabilitation-cognition): In uno studio randomizzato aperto su 54 persone che hanno iniziato la terapia per il Parkinson assistita da dispositivi, la riabilitazione personalizzata è stata collegata a una migliore performance cognitiva a un anno, un risultato secondario che necessita conferma. - [Uno studio con caffeina in dose equivalente non rileva benefici aggiuntivi sull'attenzione da una bevanda energetica](https://nootropikler.com/it/news/caffeine-matched-energy-drink-attention-trial): In 116 adulti, una bevanda energetica non ha superato una bevanda contenente la stessa quantità di caffeina (200 mg) in termini di attenzione o memoria dopo una singola sessione di prova acuta. - [I ricercatori descrivono placche mitocondriali nei cervelli modello dell’Alzheimer. ](https://nootropikler.com/it/news/mitochondrial-plaques-alzheimers-neuronal-processes): Nei topi modello di Alzheimer e nei tessuti umani post-mortem, i ricercatori hanno identificato accumuli mitocondriali nei processi neuronali insieme a un'alterata eliminazione lisosomiale. Il risultato descrive la patologia; non stabilisce un trattamento o un effetto cognitivo. - [Le assemblee di memoria della scimmia Macaca differivano a seconda del tempo trascorso dall'apprendimento](https://nootropikler.com/it/news/macaque-experience-reorganizes-memory-traces): Le registrazioni nei macachi hanno rilevato che la riattivazione durante il sonno differiva per sequenze apprese nuove, recenti e più vecchie; i ricordi più vecchi formavano assemblaggi più stabili e interconnessi. Lo studio cross-section sui primati non può tracciare le singole cellule che cambiano nel tempo. - [Una sperimentazione con finestra alimentare 16:8 di quattro settimane non ha mostrato effetti cognitivi aggiuntivi](https://nootropikler.com/it/news/time-restricted-eating-working-memory-women): In 43 donne sane, la memoria di lavoro e l'attenzione sono migliorate nel tempo in entrambi i gruppi, senza vantaggi cognitivi significativi per il digiuno a tempo limitato 16:8 rispetto alla dieta abituale. - [Piccolo pilot GeNeurofil riporta cambiamenti cognitivi e nei biomarcatori nella MCI](https://nootropikler.com/it/news/geneurofil-mci-pilot-trial): In uno studio pilota di sei mesi su 54 persone con compromissione cognitiva da lieve a moderata, GeNeurofil era associato a punteggi migliori nei test e a livelli plasmatici più bassi di alcuni marcatori. Gli autori chiedono studi di conferma più ampi. - [Piccola sperimentazione sull'Alzheimer testa una dieta chetogenica ricca di piante combinata con il digiuno](https://nootropikler.com/it/news/plant-rich-ketogenic-fasting-alzheimer-trial): In uno studio di sei mesi, con valutatori ciechi, su 60 persone che ricevevano cure standard per l'Alzheimer, il gruppo con intervento combinato ha mostrato un aumento medio del MMSE mentre i punteggi del gruppo di controllo sono diminuiti. Il disegno non può separare la dieta dal digiuno. - [Studio nutrizionale guidato da AI riporta cambiamenti cognitivi in residenti sottonutriti di strutture assistenziali](https://nootropikler.com/it/news/ai-guided-nutrition-long-term-care-cognition): Uno studio a fasi su 108 residenti di strutture di lunga degenza ha trovato che le misure nutrizionali e cognitive sono migliorate principalmente nel gruppo più malnutrito dopo un supporto alimentare su misura. Il disegno dello studio non può dimostrare che l'IA stessa abbia causato i cambiamenti. - [La revisione degli integratori rileva risultati contrastanti nei test cognitivi sull'Alzheimer e sul deterioramento cognitivo lieve](https://nootropikler.com/it/news/supplements-mci-alzheimer-network-review-2026): Una revisione di rete su 29 studi ha rilevato risultati contrastanti nei test cognitivi nella malattia di Alzheimer e nel deterioramento cognitivo lieve; nessun integratore ha migliorato in modo significativo l'ADAS-Cog. - [La riproduzione delle abilità nei topi persiste senza l'ippocampo](https://nootropikler.com/it/news/procedural-memory-replay-independent-hippocampus): Durante il sonno, i topi addestrati hanno riprodotto sequenze di attività dorsostriatale legate all'esperienza procedurale anche dopo lesioni ippocampali. La riproduzione prevedeva successivi miglioramenti nel compito, ma è ancora necessario interromperla selettivamente per stabilire il suo ruolo causale. - [Le cellule immunitarie dell'ippocampo umano cambiano durante la mezza età](https://nootropikler.com/it/news/human-hippocampus-immune-cells-shift-in-midlife): Il tessuto ippocampale post-mortem di 40 adulti di età compresa tra 20 e 95 anni ha mostrato uno spostamento a metà vita nelle popolazioni di cellule immunitarie, comprese meno microglia residenti e più cellule infiammatorie simili a cellule del sangue. - [Uno studio online associa il long COVID a punteggi più bassi nella memoria di lavoro](https://nootropikler.com/it/news/long-covid-linked-to-lower-working-memory-scores): In uno studio trasversale online su 1.064 persone, il long COVID riportato era associato a punteggi più bassi in un breve test di memoria di lavoro visiva; un compito non può diagnosticare un deficit ampio. - [La razionamento storico dello zucchero legato a esiti cerebrali e di salute mentale in età avanzata](https://nootropikler.com/it/news/early-life-sugar-rationing-brain-aging): Uno studio basato su un esperimento naturale ha confrontato adulti esposti al razionamento dello zucchero nella prima infanzia con coorti nate più tardi. Sono emerse associazioni con il successivo invecchiamento cerebrale e con esiti di salute, ma il disegno storico non dimostra che la dieta ne sia stata la causa. - [La FDA chiude l'indagine sull'epidemia di Salmonella legata alle capsule di moringa MOGO](https://nootropikler.com/it/news/fda-closes-moringa-salmonella-outbreak-investigation): La chiusura della FDA del 17 luglio ha riportato 34 malattie e 11 ospedalizzazioni collegate a lotti specifici di capsule MOGO moringa; lo stock richiamato potrebbe rimanere nelle case. - [I dendriti ippocampali elaborano segnali di apprendimento da soli](https://nootropikler.com/it/news/hippocampal-dendrites-process-learning-signals): L'imaging di voltaggio nei topi in navigazione ha trovato che alcuni segnali dendritici dell'ippocampo CA3 cambiavano prima del corpo cellulare in un ambiente nuovo, supportando l'elaborazione dendritica locale senza provare un beneficio per la memoria. - [Il richiamo con indizio cronometrato ha aumentato i guadagni di memoria nei test ripetuti.](https://nootropikler.com/it/news/cued-recall-format-increases-repeated-memory-retrieval): Attraverso quattro esperimenti, indizi iniziali vincolati alla lettera hanno prodotto guadagni maggiori rispetto al richiamo ripetuto rispetto al richiamo libero, ma il vantaggio è scomparso quando i partecipanti potevano rispondere in qualsiasi ordine. - [I livelli di p-tau217 nel sangue hanno monitorato il rischio di deterioramento cognitivo successivo negli adulti anziani](https://nootropikler.com/it/news/blood-ptau217-predicts-risk-of-cognitive-impairment): Un'analisi osservazionale aggregata di 2.684 adulti inizialmente non compromessi ha collegato livelli più elevati di p-tau217 nel sangue a un maggiore rischio futuro di compromissione cognitiva; le stime a 10 anni per il gruppo più alto erano meno certe. - [Lo studio LatAm-FINGERS testa un programma multidimensionale per il rischio di declino cognitivo](https://nootropikler.com/it/news/latam-fingers-lifestyle-cognition-trial): Un ampio studio randomizzato latinoamericano ha valutato esercizio fisico, dieta, training cognitivo e gestione dei fattori di rischio vascolare in adulti anziani a rischio; l’intervento ha mostrato un vantaggio modesto sul suo esito cognitivo principale. - [Ceperognastat non ha rallentato la progressione clinica in una sperimentazione sull'Alzheimer](https://nootropikler.com/it/news/ceperognastat-alzheimers-phase2-trial-no-clinical-benefit): In uno studio di fase 2 su 327 persone, il ceperognastat non ha rallentato in modo significativo la malattia di Alzheimer sintomatica precoce in 100 settimane; la dose più alta ha mostrato una progressione modellata più rapida rispetto al placebo. - [Le agenzie statunitensi aprono il processo per classificare i prodotti concentrati di 7-OH.](https://nootropikler.com/it/news/dea-begins-7-oh-scheduling-process): L'aggiornamento della FDA del 13 luglio ha descritto una proposta di classificazione temporanea per 7-OH concentrato e derivati sintetici, distinguendo il processo da un ordine finale. - [Suoni casuali durante un pisolino hanno interrotto le onde lente e il richiamo](https://nootropikler.com/it/news/random-sleep-audio-disrupted-slow-waves-and-recall): In uno studio di due sessioni di sonno pomeridiano su 20 uomini sani, suoni casuali hanno ridotto il sonno a onde lente e compromesso il richiamo associativo figurale, ma non la memoria verbale o procedurale; l'articolo è apparso il 25 giugno e Friburgo ne ha dato l'annuncio il 9 luglio. - [Un modello regionale dell'età cerebrale ha collegato un marcatore del tau nel sangue con la cognizione](https://nootropikler.com/it/news/regional-brain-age-pattern-links-tau-marker-and-cognition): Un'analisi trasversale di 71 adulti anziani ha trovato un'associazione indiretta tra p-tau217 e cognizione tramite un modello di età cerebrale MRI; le associazioni dirette e totali non erano significative. - [Il rumore durante il sonno ha disturbato i segnali di memoria dell'ippocampo nei ratti](https://nootropikler.com/it/news/sleep-noise-interrupts-hippocampal-memory-consolidation-in-rats): Nei ratti addormentati, suoni brevi sincronizzati con i ripples a onda acuta ippocampali riducevano l'attività dei ripple e compromettevano la ritenzione in un compito di memoria, mentre gli effetti variavano a seconda del compito. - [Due marcatori MRI sono stati associati alla progressione cognitiva nella sclerosi multipla precoce](https://nootropikler.com/it/news/multiple-sclerosis-mri-markers-cognitive-progression): In 87 persone con sclerosi multipla recidivante-remittente precoce, i marcatori MRI alla diagnosi erano associati a un successivo declino cognitivo indipendentemente dalle recidive o dall'attività MRI. - [La farina di mais fortificata non ha migliorato i punteggi cognitivi in uno studio su adolescenti etiopi femmine. ](https://nootropikler.com/it/news/vitamin-fortified-corn-flour-teen-cognition-ethiopia): In uno studio di sei mesi su 472 ragazze, la farina di mais arricchita con folato e vitamina B12 non ha prodotto benefici cognitivi significativi. Un'analisi secondaria ha rilevato una differenza in un test linguistico in base alla condizione di ritardo della crescita. - [Un maggior consumo di alimenti ultra-processati è collegato a una minore attenzione in una coorte australiana](https://nootropikler.com/it/news/ultra-processed-foods-attention-apoe4): Un'analisi trasversale di 2.192 adulti australiani ha associato una maggiore quota di cibi ultraprocessati a un punteggio di attenzione leggermente più basso, ma non ha trovato alcun legame chiaro con la memoria e non può stabilire causalità. - [La FDA cita le affermazioni sull’Alzheimer e sull’ansia sul sito di un venditore di tè verde](https://nootropikler.com/it/news/fda-warns-green-tea-seller-over-disease-treatment-claims): Una lettera della FDA del 2 luglio ha contestato le affermazioni di un venditore relative ad Alzheimer, Parkinson e ansia per il tè verde; l'azione riguarda la commercializzazione e l'approvazione dei farmaci, non un nuovo studio di efficacia. - [Marker ematici dell'Alzheimer a mezza età legati ai punteggi cognitivi in coorte](https://nootropikler.com/it/news/nih-midlife-alzheimer-biomarkers-cognition): Un rapporto NIH di luglio ha evidenziato uno studio della coorte CARDIA che collega i marcatori di amiloide e tau nel sangue con differenze cognitive nella mezza età; i risultati sono osservazionali. - [Gli spazzamenti theta ippocampali tracciavano obiettivi ricordati nei ratti](https://nootropikler.com/it/news/goal-directed-hippocampal-theta-navigation): Nei ratti che navigano in un'arena aperta, le sequenze theta ippocampali dipendenti dall'apprendimento prevedevano i percorsi verso obiettivi ricordati e si coordinavano con l'attività prefrontale. Questo identifica un circuito candidato alla pianificazione, non la prova che le sequenze causino la navigazione. - [I chetoni derivati da MCT sono stati studiati come fonte di energia alternativa per il cervello durante l'ipoglicemia.](https://nootropikler.com/it/news/mct-ketones-hypoglycemia-working-memory-t1d): Uno piccolo studio umano ha riscontrato che quattro settimane di una dieta MCT erano associate a una migliore precisione della memoria di lavoro durante l'ipoglicemia indotta nel diabete di tipo 1; il tempo di reazione non è migliorato. ## Nootropik News — Deutsch - [Stimmungsveränderungen und aufdringliche Gedanken waren mit der Erinnerung an beabsichtigte Handlungen verbunden](https://nootropikler.com/de/news/affective-changes-intrusive-thoughts-prospective-memory): In einer Studie mit 120 jüngeren und älteren Erwachsenen wurden 117 in die Analysen zum prospektiven Gedächtnis einbezogen. Stimmung und Kontrolle aufdringlicher Gedanken waren mit der Leistung verbunden; das belegt weder Kausalität noch eine Behandlung. - [Nature Neuroscience eröffnet eine Sonderausgabe zu Neurotechnologie und Gehirn-Computer-Schnittstellen](https://nootropikler.com/de/news/neurotechnology-special-issue-editorial-october-2026): Ein Leitartikel vom 1. Oktober führt in eine Sonderausgabe darüber ein, wie Neurotechnologie Gehirnforschung, Assistenzgeräte und Fragen der Datenverwaltung verknüpft; es handelt sich um einen redaktionellen Überblick, nicht um ein neues Experiment. - [Konnektivitätsmuster im Gehirn unterschieden sich zwischen Alzheimer-Pathologie und Alterung.](https://nootropikler.com/de/news/alzheimer-connectivity-gradients-aging-biofinder-adni): MRT-Analysen in BioFINDER-2 und ADNI brachten Alzheimer-Pathologie und Alter mit unterschiedlichen Konnektivitätsgradienten über den gesamten Kortex in Verbindung. Die Kohortenbefunde zeigen Assoziationen, keinen Diagnosetest oder Kausalmechanismus. - [Eine kleine Studie mit einer Mischung aus schwarzen Johannisbeeren ergab selektive Aufmerksamkeitsveränderungen bei älteren Erwachsenen](https://nootropikler.com/de/news/blackcurrant-theanine-pine-bark-attention-crossover): Crossover-Studie mit 26 älteren Erwachsenen nach je vier Wochen mit einer Mischung aus Schwarzer Johannisbeere, L-Theanin und Pinienrinde oder Placebo. Fehlalarme nahmen ab; Gedächtnis- und Ermüdungsbefunde waren nach Mehrfachtestkorrektur nicht signifikant. Einzelwirkungen lassen sich nicht trennen. - [Ein maschinelles Lernmodell schätzte eine zukünftige kognitive Beeinträchtigung bei der Parkinson-Krankheit.](https://nootropikler.com/de/news/parkinsons-tabpfn-cognitive-impairment-prediction): Eine retrospektive Studie berichtete für ein TabPFN-Modell AUC-Werte von 0,822 in der internen und 0,742 in einer externen Kohorte. Vor einer klinischen Anwendung ist laut Autoren eine prospektive multizentrische Validierung nötig. - [Verteilte menschliche Neuronenpopulationen im Hippocampus trugen Informationen zur Wortbedeutung.](https://nootropikler.com/de/news/human-hippocampus-distributed-semantic-code): Aufzeichnungen während des Hörens einer Erzählung brachten verteilte Aktivitätsmuster im Hippocampus mit der Bedeutung von Wörtern in Verbindung. Das galt auch in Analysen, die Phonetik und Grammatik berücksichtigten. - [Kurze Studie zu schwarzem Kardamom berichtet bessere Aufmerksamkeitstests bei Industriefinanzierung](https://nootropikler.com/de/news/black-cardamom-extract-short-attention-trial): In einer 14-tägigen Studie wurden 96 Erwachsene randomisiert mit schwarzem Kardamomextrakt, Koffein, deren Kombination oder Placebo behandelt. 85 gingen in die Endauswertung ein. Gemeldete Testgewinne erfordern eine unabhängige Replikation und belegen keinen dauerhaften kognitiven Nutzen. - [Eine Mausstudie verbindet den bakteriellen Indolweg des Darms mit Schlaganfallverletzungen und der Immunantwort.](https://nootropikler.com/de/news/gut-microbiota-indole-stroke-severity-immune-response): Mausexperimente zeigten, dass bakterielle Indol-Signalgebung die Immunaktivität nach Schlaganfall und Hirnverletzung beeinflusst. In einer menschlichen Schlaganfallkohorte war die Häufigkeit des bakteriellen Gens tnaA mit schlechteren Ergebnissen verbunden; der Mechanismus ist beim Menschen nicht belegt. - [Gehirnaufzeichnungen kartierten gemeinsame und unterschiedliche Signale für vorgestellte und gesprochene Sprache](https://nootropikler.com/de/news/imagined-speech-neural-architecture-ecog): Hochdichte Aufzeichnungen während wacher Operationen zeigten gemeinsame Planungssignale und unterschiedliche sensomotorische Muster für vorgestellte versus gesprochene Silben, ein Ergebnis, das zukünftige Sprachschnittstellen informieren könnte. - [Übereinstimmende Maskierungsbedingungen erleichterten die Wiedererkennung in einem von zwei Gesichtsgedächtnis-Experimenten.](https://nootropikler.com/de/news/masked-face-recognition-context-congruency): Zwei Experimente mit niedrig auflösenden realen Bildern ergaben einen Kongruenzvorteil, wenn maskierte Gesichter im ersten Experiment enkodiert wurden, jedoch nicht im zweiten. Die Genauigkeit war insgesamt bescheiden. - [Unter Anästhesie zeigte sich bei sechs Spezies eine gemeinsame Signatur neuronaler Dynamik.](https://nootropikler.com/de/news/cross-species-neural-dynamics-under-anesthesia): Eine artübergreifende Analyse von Gehirnaufzeichnungen zeigte kürzere lokale neuronale Zeitskalen und schwächere interregionale Synchronizität unter Anästhesie; thalamische Stimulation kehrte das Muster bei Makaken um. - [Ein per Funk aktivierter, batteriefreier Stimulator funktionierte bei frei beweglichen Mäusen.](https://nootropikler.com/de/news/wireless-rf-neurostimulation-freely-moving-mice): Eine Tier-Geräte-Studie prüfte einen kabellosen transkraniellen Stimulator, der durch abgestrahlte Funkwellen betrieben wird. Er hielt seine Ausgangsleistung über einen Käfig hinweg aufrecht und löste Kreisen aus, wenn er auf ein motorisches Hirnareal gerichtet war. - [Fernseh- und Computernutzung zeigten gegensätzliche Zusammenhänge mit der Kognition bei älteren Erwachsenen](https://nootropikler.com/de/news/screen-time-types-and-cognition-older-adults): In vier Kohorten zum Altern ging mehr Fernsehkonsum mit niedrigeren Kognitionswerten einher, während Computernutzung mit höheren Werten verbunden war. Mendelsche-Randomisierungsanalysen lieferten unterstützende, aber annahmeabhängige Hinweise. - [Unsicherheit in der Umgebung verringerte den Planungsaufwand bei einer menschlichen Aufgabe ](https://nootropikler.com/de/news/environmental-stochasticity-reduces-human-planning-effort): In drei Formen von Umweltunsicherheit planten die Teilnehmer weniger, reagierten schneller und verwendeten einfachere Entscheidungsstrategien, die weniger empfindlich gegenüber den Optionswerten waren. - [Die Studie fand keine nachweisbaren Unterschiede des APOE ε4 in der Kognition bei gesunden jungen Erwachsenen.](https://nootropikler.com/de/news/apoe4-young-adult-cognition-navigation-null): Bei 1.000 gesunden Erwachsenen im Alter von 18 bis 35 Jahren unterschieden sich ε3ε4-Träger bei Navigation und mehreren kognitiven Aufgaben nicht erkennbar von ε3ε3-Trägern. Das Ergebnis gilt für diese Stichprobe und Altersgruppe. - [Kortikale Schichten veränderten sich unterschiedlich, während Mäuse eine Aufgabe mit Schnurrhaarreizen erlernten.](https://nootropikler.com/de/news/cortex-wide-laminar-dynamics-learning-mice): Weitfeld-Bildgebung über 25 kortikale Areale zeigte unterschiedliche, manchmal gegensätzliche Aktivitätsänderungen in den Schichten 2/3 und 5, während männliche Mäuse eine auf Schnurrhaaren basierende Aufgabe erlernten. Die Studie kartiert lernbezogene Dynamiken, isoliert jedoch nicht alle kausalen Beiträge. - [Darmmikrobiota und Indol-3-Milchsäure standen in einer Studie zu vaskulären Beeinträchtigungen mit kognitiver Erholung in Verbindung.](https://nootropikler.com/de/news/gut-ila-axis-vascular-cognitive-impairment): Eine klinische Kohorte und Mausversuche brachten den mikrobiellen Tryptophanstoffwechsel mit Kognition und glymphatischer Funktion in Verbindung. Die klinischen Beobachtungen waren explorativ; Interventionsbelege stammten von Mäusen. - [Die Amygdala-Striatum-Bahn modulierte repetitives Verhalten bei Mäusen](https://nootropikler.com/de/news/amygdala-striatum-circuit-repetitive-behavior-mice): Eine Mausstudie kartierte eine direkte Projektion von der Amygdala zum dorsolateralen Striatum. Sie modulierte reizinduziertes Putzen und war in einem Modell für zwanghaftes Putzen verstärkt. Das ist ein Befund zu neuronalen Schaltkreisen bei Tieren, kein Beleg für eine Ursache oder Behandlung beim Menschen. - [Kleine Biopsien lebenden Hirngewebes boten direkten Einblick in die Alzheimer-Pathologie.](https://nootropikler.com/de/news/alzheimer-pathology-living-brain-biopsy-proteomics): Bei 18 Personen, die wegen eines vermuteten Normaldruckhydrozephalus eine Shunt-Operation erhielten, fanden Forschende Amyloidplaques in neun Biopsien und kartierten Plaquechemie sowie Tau-Umsatz. Die selektive chirurgische Stichprobe schränkt die Verallgemeinerbarkeit ein. - [Ein NIH-unterstützter Atlas kartiert Zellaktivitätsmuster bei verschiedenen Hirnerkrankungen](https://nootropikler.com/de/news/nih-single-cell-atlas-brain-disorders): NIH gab bekannt, dass molekulare Karten aus über 6,3 Millionen Zellkernen und 1.494 Spendern erstellt wurden, die eine Forschungsressource für Alzheimer und verwandte Gehirnerkrankungen bieten. - [Rhesusaffen passten ihre Entscheidungsgeschwindigkeit auf eine Weise an, die mit der Genauigkeit zusammenhing.](https://nootropikler.com/de/news/macaques-metacognitive-control-decision-accuracy): In einer Zwei-Wahl-Aufgabe waren Rhesusmakaken bei schnelleren Antworten genauer, auch nach Berücksichtigung des Schwierigkeitsgrads. Ein Überwachungsmodell könnte das Muster erklären, belegt aber kein subjektives Vertrauen. - [COSMOS-Biomarkeranalyse findet keinen zweijährigen Effekt von Multivitaminen oder Kakaextrakt](https://nootropikler.com/de/news/cosmos-multivitamin-cocoa-neurodegeneration-biomarkers): In einer randomisierten Substudie bei älteren Erwachsenen veränderten weder ein Multivitaminpräparat noch Kakaextrakt über zwei Jahre hinweg drei Blut-Biomarker im Vergleich zu Placebo. Diese Biomarker-Ergebnisse klären nicht, ob Nahrungsergänzungsmittel die Kognition über andere Wege beeinflussen. - [Striatumgerichtete Stimulation veränderte in einer Humanstudie Entscheidungen über geistige Anstrengung.](https://nootropikler.com/de/news/temporal-interference-stimulation-mental-effort): In einem kleinen Experiment mit gesunden Erwachsenen veränderte die zeitliche Interferenzstimulation, wie die Teilnehmer Belohnungen und kognitive Anstrengung bewerteten, zusammen mit Veränderungen in striatalen und cingulären Signalen. - [Schätzungen der visuellen Aufmerksamkeit waren über zwei Aufgaben hinweg nicht eindeutig austauschbar](https://nootropikler.com/de/news/visual-attention-estimates-depend-on-task): Dreißig Teilnehmende absolvierten zwei Aufgaben zur visuellen Aufmerksamkeit. Die mittleren Schätzungen lagen bei 58 Hz und 49 Hz; die Analysen belegten weder einen klaren Unterschied noch Gleichheit. - [Eine MIND-Ernährung mit bereitgestellten Mahlzeiten verbesserte in einer kleinen MCI-Studie die kognitiven Werte.](https://nootropikler.com/de/news/mind-based-diet-mci-cluster-rct-korea): In einer offen durchgeführten 12-wöchigen koreanischen Studie mit 80 Erwachsenen mit MCI verbesserten beide Gruppen, die die MIND-Diät über Mahlzeiten erhielten, die K-MMSE2-Werte im Vergleich zur Kontrollgruppe; die Zusammenfassung gibt keine Effektgröße an. - [Kleine Kohorte verbindet Schadstoffbelastung, Darmmikroben und Aufmerksamkeitsmessungen](https://nootropikler.com/de/news/pah-gut-microbiome-attention-impulsivity-cohort): Bei 34 Erwachsenen kovariierten die gemessene Belastung durch polyzyklische aromatische Kohlenwasserstoffe, Mikrobiomprofile und neurobehaviorale Gruppierungen. Keine einzelne mikrobielle Gattung blieb nach der Korrektur mit der Verhaltensgruppierung assoziiert; mögliche Zusammenhänge sind daher explorativ. - [Reziproke Signale des visuellen Kortex förderten übereinstimmende Antworten in Maus-Hirnarealen.](https://nootropikler.com/de/news/reciprocal-visual-cortex-connections-consensus): Mausaufzeichnungen, optogenetische Eingriffe und Schaltkreismodelle deuteten darauf hin, dass reziproke Verbindungen zwischen V1 und LM kongruente visuelle Aktivität verlängerten und widersprüchliche Signale auflösten. Der Befund betrifft eine einfache Sehaufgabe und eine modellgestützte Interpretation. - [Ein kombiniertes Prismen- und Spielprogramm verbesserte einige kognitive Werte nach einem Schlaganfall.](https://nootropikler.com/de/news/mindlenses-poststroke-cognitive-rehabilitation-trial): In einer randomisierten Schlaganfallstudie mit 60 Personen verbesserten ein Prismenanpassungs- und Tablet-Spielgerät das Gedächtnis ab drei Monaten und die Sprache bei den Nachuntersuchungen im Vergleich zur Standardrehabilitation. - [Tägliche Müdigkeit und schneller als übliche Leistung gingen einer geringeren Überwindung der Müdigkeit voraus](https://nootropikler.com/de/news/fatigue-processing-speed-override-daily-life): Eine gemeinsame Analyse von sechs Alltagsstudien ergab, dass sowohl stärkere Müdigkeit als üblich als auch eine höhere Verarbeitungsgeschwindigkeit jeweils Stunden später eine engere Kopplung von Müdigkeit und Leistung vorhersagten. Dies gilt als Hinweis darauf, dass Müdigkeit seltener übergangen wird. - [Die FDA weitet die Warnung vor giftigem gelbem Oleander auf die Produkte Niwali und Easy Forte aus](https://nootropikler.com/de/news/fda-yellow-oleander-niwali-easy-forte-alert): Die FDA ergänzte eine Sicherheitswarnung um Niwali Tejocote Pieces, Niwali Tejocote Capsules und Easy Forte Natural Fiber, nachdem Tests giftigen gelben Oleander nachgewiesen hatten. Sie rät, die Einnahme zu beenden und medizinischen Rat einzuholen. - [Astrozyten bildeten zeitlich abgestimmte Aktivitätssequenzen während der Gedächtnisabrufung bei Mäusen ](https://nootropikler.com/de/news/hippocampal-astrocyte-sequences-memory-mice): Bildgebung bei Mäusen zeigte komprimierte Calciumsequenzen in CA1-Astrozyten während der Furchtkonditionierung und deren Wiederauftreten im konditionierten Kontext. Die korrelativen Aufzeichnungen zeigen nicht, dass Astrozyten Erinnerungen erzeugen oder für sie notwendig sind. - [Blutstoffwechselprofil verband die Einhaltung der Mittelmeerdiät mit ausgewählten kognitiven Messungen](https://nootropikler.com/de/news/mediterranean-diet-metabolite-signature-cognition-cohorts): Eine Studie mit zwei Kohorten leitete eine Blut-Signatur aus 23 Metaboliten ab, die mit der Einhaltung der Mittelmeerdiät und einigen kognitiven Messwerten zusammenhing. Die Übertragbarkeit auf die zweite Kohorte war zunächst gering; das Studiendesign war beobachtend. - [Kleinhirnzellen sagten bei Mäusen verzögerte Belohnungen nach neuronaler Stimulation voraus.](https://nootropikler.com/de/news/cerebellar-dopamine-reward-prediction-mice): Bei Mäusen sagten Kleinhirn-Granulazellen verzögerte Belohnungen nach Stimulation dopaminerger Neuronen oder des medialen Vorderhirnbündels voraus; Kletterfasern reagierten erst danach. Eingriffe in diese Aktivität stützten eine Rolle in der Aufgabe, belegen aber keine Wirkung auf menschliche Kognition. - [Veränderungen im Wiedererkennungsgedächtnis spiegelten den Verlauf einer frühen Alzheimer-Kohorte wider.](https://nootropikler.com/de/news/alzheimer-recognition-memory-progression-cohort): Eine 24-monatige Studie mit 278 älteren Erwachsenen mit amnestischer leichter kognitiver Beeinträchtigung ergab: Eine geringere Trennschärfe beim Wiedererkennen und ein früher Rückgang sagten nach Anpassung an weitere Messgrößen den Übergang zu Alzheimer-Demenz voraus. - [Soziale Benachteiligung ging in einer großen Kohorte mit dauerhaft niedrigerer selbst eingeschätzter Gedächtnisleistung einher.](https://nootropikler.com/de/news/social-disadvantage-subjective-memory-longitudinal-cohort): Über sechs Erhebungswellen mit 14.938 Chinesinnen und Chinesen ab 45 Jahren war kumulierte soziale Benachteiligung mit dauerhaft niedrigerer selbst eingeschätzter Gedächtnisleistung verbunden. Diese korrelierte nur schwach mit objektiver Kognition. - [Adaptive Gehirn-Computer-Schnittstellen-Algorithmen haben das neuronale Lernen bei Affen neu geformt](https://nootropikler.com/de/news/assistive-algorithms-shape-bci-learning): Längsschnittaufzeichnungen und ein neuronales Netzwerkmodell deuten darauf hin, dass adaptive BCI-Decodierer während der Übung Aufgabeninformationen auf weniger neuronale Signale konzentrierten, im Gegensatz zu festen Decodierern. - [Überlappende Repräsentationen im ventralen Hippocampus begleiteten bei Mäusen den schnellen Abruf von Furchterinnerungen.](https://nootropikler.com/de/news/ventral-hippocampus-overlapping-fear-memory-codes): Calcium-Bildgebung bei Mäusen zeigte, dass Furchtlernen bedrohliche und neutrale Kontextrepräsentationen im ventralen CA1 ähnlicher machte, wo bedrohungsbezogene Aktivität während der Abrufphase schnell zurückkehrte. - [Schlafeffizienz, nicht Schlafdauer, war über zwei Jahre mit exekutiven Funktionen verbunden.](https://nootropikler.com/de/news/sleep-efficiency-executive-function-repeated-cohort): Bei 233 Erwachsenen ab 55 Jahren war eine höhere, mit Wearables gemessene Schlafeffizienz mit besseren exekutiven Funktionen verbunden. Schlafdauer und selbst eingeschätzte Schlafqualität hingen nicht signifikant mit kognitiven Bereichen zusammen. - [Ein Gehirnimplantat entschlüsselte bei einer Person mit Lähmung versuchte Sprache und Gesten gleichzeitig.](https://nootropikler.com/de/news/speech-gesture-paralysis-brain-computer-interface): Eine Studie mit drei Teilnehmenden nutzte ein kortikales Implantat, um versuchte Sprache und Gesten zu entschlüsseln. Das ist ein Machbarkeitsnachweis für natürlichere Kommunikation über eine Gehirn-Computer-Schnittstelle. - [Furchtlernen veränderte inhibitorische Synapsen in verschiedenen Teilen der CA1-Neuronen von Mäusen. ](https://nootropikler.com/de/news/ca1-inhibitory-synapses-remodel-with-fear-learning): Langzeitbildgebung zeigte, dass Spurenangst-Konditionierung dendritische inhibitorische Synapsen umorganisierte, aber jene am Axonhügel von hippocampalen Pyramidennneuronen stabilisierte. - [Übersicht fasst Beobachtungsdaten zu Nahrungscholin und Kognition zusammen.](https://nootropikler.com/de/news/dietary-choline-cognition-observational-evidence-review): Eine systematische Übersichtsarbeit und Dosis-Wirkungs-Metaanalyse bewerteten Beobachtungsstudien zur Cholinaufnahme über die Nahrung und zu kognitiven Ergebnissen. Die Evidenz betrifft Zusammenhänge in bestehenden Studien, nicht die Frage, ob Cholinpräparate einem Abbau vorbeugen. - [Nahrungsmittelunsicherheit und Stress waren mit Unterschieden bei kognitiven Aufgaben bei College-Studenten verbunden](https://nootropikler.com/de/news/food-insecurity-stress-college-student-cognition): Eine Querschnittsstudie mit 230 Studierenden brachte Ernährungsunsicherheit und Stress mit Unterschieden bei Aufmerksamkeits-, Entscheidungs- und Gedächtnisabgleichaufgaben in Verbindung. Diese Zusammenhänge belegen nicht, dass der Zugang zu Nahrungsmitteln die Testergebnisse verursacht hat. - [Meta-Analyse findet bescheidene kognitive Signale von ketogenen Diäten, mit Lipid-Abwägungen](https://nootropikler.com/de/news/ketogenic-diet-cognitive-impairment-meta-analysis): Eine Übersicht über 12 Studien ergab zusammengefasste kognitive Signale bei älteren Erwachsenen mit Beeinträchtigungen zusammen mit höheren Gesamtcholesterin- und LDL-C-Werten. - [Bewegungsstudien weisen auf unterschiedliche Gehirnaktivierungsmuster für das Arbeitsgedächtnis hin](https://nootropikler.com/de/news/exercise-working-memory-fmri-meta-analysis): Eine Aktivierungs-Likelihood-Metaanalyse von 11 fMRT-Studien fand teilweise unterschiedliche Aktivierungsänderungen nach Trainingsinterventionen und bei Menschen, die langfristig trainierten. Wegen der kleinen Evidenzbasis sind die Karten explorativ. - [Post-COVID-Studie berichtet über Zusammenhänge zwischen Darmmikroben und bildgebenden Gehirnmaßen](https://nootropikler.com/de/news/post-covid-gut-microbiome-brain-imaging-associations): Eine kleine Querschnittsstudie brachte Darmmikrobenmuster mit Symptomen und MRT-Messwerten bei Post-COVID-Erkrankung in Verbindung. Sie zeigt nicht, dass das Mikrobiom Hirnveränderungen oder Symptome verursacht hat. - [Persistierende Einsamkeit steht in Zusammenhang mit schlechterer Gesundheit in einer älteren Erwachsenen-Kohorte](https://nootropikler.com/de/news/loneliness-isolation-trajectories-older-adult-health): Eine Längsschnittanalyse von 4.090 Erwachsenen aus England brachte chronische Einsamkeit mit schlechterer körperlicher und psychischer Gesundheit in Verbindung. Das Ende sozialer Isolation ging mit besserer Kognition einher; die Beobachtungsdaten belegen keine Ursache. - [Nervennahes Stimulationsverfahren erwies sich in einer kleinen Bewusstseinsstudie als mögliche EEG-Messgröße.](https://nootropikler.com/de/news/near-nerve-stimulation-consciousness-assessment): Eine Pilotstudie an einem Zentrum verglich Stimulation in Nervennähe mit Hautstimulation bei 19 Personen mit anhaltenden Bewusstseinsstörungen. Die Autoren fordern eine externe Validierung des EEG-basierten Messverfahrens. - [Frontales Tau wurde mit gestörten Schlafwellen und schlechterem Gedächtnis in Verbindung gebracht](https://nootropikler.com/de/news/frontal-tau-linked-to-disrupted-sleep-waves-and-memory): In Kohorten älterer Erwachsener, untersucht mit Tau-PET, EEG und Liquormarkern, war höheres frontales Tau mit weniger weit wandernden langsamen Schlafwellen und schlechterem Behalten über Nacht verbunden. - [Langfristige Kohorten trennen die Alzheimer-Pathologie von der kognitiven Resilienz](https://nootropikler.com/de/news/alzheimer-pathology-cognitive-resilience-longitudinal-risk): Bei 3.119 älteren Erwachsenen, die median 13,7 Jahre beobachtet wurden, waren Pathologie und ein abgeleiteter Maßstab kognitiver Resilienz jeweils unabhängig mit dem Demenzrisiko verbunden. Die Beobachtungsanalyse belegt keine Kausalität. - [Durst und Flüssigkeitszufuhr beim Training in Hitze beeinflussten die Konzentrationsbewertung, nicht die Exekutivtests.](https://nootropikler.com/de/news/thirst-satiation-heat-exercise-executive-function): Bei 12 Männern führte Wasser zu einem ähnlichen Flüssigkeitshaushalt wie intravenöse Kochsalzlösung, doch nach Kochsalzlösung waren sie durstiger und thermisch stärker belastet. Ergebnisse in Flanker-Aufgaben und Stimmungswerte unterschieden sich nicht. - [Geruchslernen reorganisierte neuronale Darstellungen bei Zebrafischen](https://nootropikler.com/de/news/odor-learning-reorganizes-brain-representations-in-zebrafish): Ein Geruchsunterscheidungstraining erhöhte bei jungen und erwachsenen Zebrafischen die Trennung aufgabenrelevanter neuronaler Muster im pDp. Die Geometrie der Repräsentationen sagte die individuelle Leistung voraus. - [Merkmalsinterferenz war mit Entscheidungsfehlern verbunden, wenn Aufgabenhinweise unsicher waren. ](https://nootropikler.com/de/news/feature-interference-cost-of-task-uncertainty): Das menschliche Verhalten, Affen-V1-Aufzeichnungen und Modellierungen verbanden Unsicherheit darüber, welche Wahrnehmungsaufgabe durchzuführen ist, mit stärkerer Codierung irrelevanter Merkmale und weniger klaren neuronalen Darstellungen. - [Seltene kortikale inhibitorische Neuronen förderten synchronisierte Aktivität und Schlaf bei Mäusen](https://nootropikler.com/de/news/cortical-sst-chodl-neurons-promote-sleep-mice): Die gezielte Aktivierung hemmender Sst-Chodl-Neuronen förderte die Synchronität der Hirnrinde und den Schlaf bei Mäusen. Die September-Publikation führt zuvor als Preprint verfügbare Forschung zu neuronalen Schaltkreisen fort; sie belegt keine Schlaftherapie für Menschen. - [Ein Tau-assoziierter mitochondrialer Prozess verringerte Defizite in Tiermodellen](https://nootropikler.com/de/news/nih-tau-mitochondria-reverse-electron-transport): Das NIH hob Experimente hervor, die verändertes Tau mit dem mitochondrialen Rückwärtstransport von Elektronen verknüpfen. Die Blockade dieses Signalwegs half in Krankheitsmodellen, nicht aber in einer klinischen Studie mit Patienten. - [Ein gemeindenahes Parkinson-Rehabilitationsprogramm ging mit besseren kognitiven Testergebnissen einher.](https://nootropikler.com/de/news/parkinsons-pd-core-cognitive-rehabilitation): In einer Vorher-nachher-Studie mit 45 Personen folgten auf ein Gruppenprogramm mit sieben Sitzungen Verbesserungen bei Tests zu globaler Kognition und praktischem Urteilsvermögen. Ohne Kontrollgruppe lassen sich Behandlungseffekte nicht von Übung oder anderen Veränderungen trennen. - [Freistehendes submikron-ECoG-Array zielt auf flexible Aufzeichnungen an der Gehirnoberfläche.](https://nootropikler.com/de/news/submicron-ecog-electrode-array): Ingenieure berichteten über ein dünnes, freistehendes Elektrodenkortikographie-Array, inspiriert von der Struktur von Libellenflügeln, das einen Materialkompromiss löst, der für zukünftige Brain-Computer-Interfaces relevant ist. - [Ein multidimensionales Gesundheitsprofil verfolgte die kognitive Alterung über drei Kohorten hinweg.](https://nootropikler.com/de/news/intrinsic-capacity-profile-cognitive-aging-three-cohorts): Bei 26.022 Erwachsenen in drei Alterskohorten waren Beeinträchtigungen in nicht-kognitiven Gesundheitsbereichen mit niedrigeren kognitiven Werten und einem höheren Risiko für spätere kognitive Beeinträchtigungen verbunden. - [Die Studie verbindet längere Nickerchen mit einer langsameren Verarbeitungsgeschwindigkeit bei älteren Erwachsenen.](https://nootropikler.com/de/news/pointer-zzz-napping-apnea-cognition): Eine Ausgangsanalyse von 686 älteren US-amerikanischen POINTER-Teilnehmenden brachte längere Tagesschläfchen mit geringerer Verarbeitungsgeschwindigkeit in Verbindung. Kausalität und eine Wechselwirkung mit Apnoe wurden nicht belegt. - [Multi-Omics-Analysen schlagen stadiumsbezogene Parkinson-Biomarker-Kandidaten vor ](https://nootropikler.com/de/news/parkinsons-proteo-metabolomic-stage-biomarkers): Eine Sekundäranalyse der Parkinson’s Progression Markers Initiative kombinierte Liquor- und Plasmaproteine sowie Metaboliten, um mögliche Marker zu finden. Die Machine-Learning-Befunde sind explorativ und müssen unabhängig klinisch validiert werden. - [Die UK Biobank-Kohorte zeigt Zusammenhänge zwischen der Dichte von Niacin in der Ernährung und Kognition sowie Demenzrisiko](https://nootropikler.com/de/news/niacin-diet-density-cognition-dementia-cohort): Eine große bevölkerungsbasierte Kohortenstudie untersuchte Niacinäquivalente aus der Nahrung im Zusammenhang mit kognitiver Funktion und neu auftretender Demenz. Das Beobachtungsdesign zeigt nicht, dass mehr Niacin dem Abbau vorbeugt. - [Unterschiedliche Erinnerungen waren mit einer präziseren visuellen Aufmerksamkeit verbunden](https://nootropikler.com/de/news/distinct-memories-help-focus-on-visual-targets): In einer visuellen Suchaufgabe mit fMRT und Eye-Tracking bei Menschen waren klarer getrennte hippocampale Gedächtnismuster mit genaueren gedächtnisgesteuerten Augenbewegungen und geringerer Aktivierung konkurrierender Ziele verbunden. - [SUPPLX ruft zwei Produkte zurück, nachdem Tests nicht deklariertes Yohimbin nachgewiesen hatten.](https://nootropikler.com/de/news/fda-recalls-products-undeclared-yohimbine): SUPPLX rief Business Pill und Branch Manager for Men freiwillig zurück, nachdem Tests nicht deklariertes Yohimbin nachgewiesen hatten. Die FDA veröffentlichte die Mitteilung am 4. September. - [Strukturiertes frühes Üben formte flexibles Lernen bei Mäusen. ](https://nootropikler.com/de/news/structured-practice-shaped-flexible-learning-in-mice): Bei Mäusen, die eine Timing-Aufgabe erlernten, unterstützten strukturierte frühe Beispiele flexiblere spätere Strategien und aufgabenbezogene Entorhinalaktivität; die Studie testete auch Vorhersagen eines neuronalen Netzwerkmodells. - [Europäische Umfrage verbindet sehr langen Schlaf und Tagesschläfchen mit kognitiven Beeinträchtigungen ](https://nootropikler.com/de/news/european-sleep-duration-cognition-share-analysis): Eine Querschnittsanalyse von 88.889 SHARE-Interviews brachte Schlaf von mindestens 10 Stunden und Tagesschläfchen mit niedrigeren Kognitionswerten in Verbindung. Sie kann nicht klären, ob Schlafmuster eine Beeinträchtigung verursachen. - [Eine kleine, scheinkontrollierte Alzheimer-Studie berichtet über kognitive Verbesserungen nach zerebellärer Stimulation.](https://nootropikler.com/de/news/alzheimer-cerebellar-rtms-fnirs-rct): In einer randomisierten Studie mit 33 Personen war die globale Kognition nach zwei Wochen zerebellärer rTMS bis Woche 12 besser als nach Sham-Stimulation. fNIRS-Veränderungen waren hämodynamische Messwerte, keine direkten Aufzeichnungen neuronaler Aktivität. - [Semaglutid im hohen Alter verbesserte Gedächtnisleistungen bei Mäusen; die Effekte beim Menschen sind noch unbekannt](https://nootropikler.com/de/news/nih-semaglutide-late-life-mice-cognition): Eine vom NIH berichtete Mausstudie fand, dass Semaglutid im späten Lebensalter Messwerte des räumlichen Gedächtnisses verbesserte. Die klinische Bedeutung für Menschen ist nicht belegt. - [Alzheimer-Biomarker zeichneten eine Parkinson-Subgruppe mit schnellerem Abbau aus](https://nootropikler.com/de/news/parkinsons-alzheimer-biomarker-cognitive-profiles): In einer prospektiven Kohorte erfüllten 42 von 449 Parkinson-Teilnehmenden mit positiven Biomarkern die Alzheimer-Biomarker-Kriterien und zeigten später stärkeren kognitiven und motorischen Abbau. Der Beobachtungsbefund ist prognostisch, nicht kausal. - [Zwei parietale Bereiche der Maus zeigten unterschiedliche Rollen bei visuellen und Entscheidungsaufgaben](https://nootropikler.com/de/news/mouse-parietal-cortex-functional-architecture): Bildgebung tausender Mäuseneuronen zeigte, dass die medialen Parietalareale AM und A visuelle Reiz- und Wahlinformationen sowie Entscheidungsvorgeschichte und Haltung unterschiedlich kodierten. Die Studie beschreibt funktionelle Organisation, belegt aber nicht, dass diese Areale allein das Verhalten verursachen. - [Die Glutamatkonzentration verschob die AMPA-Rezeptor-Signalzustände an Maussynapsen](https://nootropikler.com/de/news/glutamate-levels-tune-ampa-receptor-conductance): Experimente an Synapsen von Mäuse-Interneuronen zeigten, dass eine geringere Glutamatexposition Eigenschaften von AMPA-Rezeptoren durch die Besetzung unterschiedlicher Leitfähigkeitszustände veränderte. - [Eine bildgebende Methode des Gehirns kartierte, wie sich der kortikale Signalfluss mit dem mentalen Zustand verändert.](https://nootropikler.com/de/news/human-cortical-signal-flow-hierarchy-changes-with-state): Ein validierter Rahmen zur Analyse effektiver Konnektivität ergab eine kortikale Hierarchie beim Menschen, die bei extern fokussierter Verarbeitung flacher und bei intern fokussierten Zuständen steiler war. - [Studie kartiert mehrere mikrobielle Reiche im Darm bei Depression und Kognition.](https://nootropikler.com/de/news/multi-kingdom-gut-microbiome-depression-cognition): Eine Studie mit 121 jungen Erwachsenen mit erster depressiver Episode und 117 Kontrollpersonen fand Unterschiede bei bakteriellen, viralen, pilzlichen und archaealen Signalen. Das Querschnittsdesign belegt nicht, dass Mikrobiomveränderungen Depression oder kognitive Unterschiede verursachen. - [Das KI-Modell rekonstruierte Tiefen-Gehirn-Signale aus kortikalen Aufnahmen für DBS-Forschung](https://nootropikler.com/de/news/deep-learning-subcortical-signal-reconstruction-dbs): Eine multizentrische Analyse von Aufzeichnungen bei Menschen mit Bewegungsstörungen prüfte, ob ein generatives Modell subkortikale Aktivität aus kortikalen Signalen ableiten kann, um Datenlücken bei der Closed-Loop-Stimulation zu schließen. - [Studie zu Ernährungsunterstützung in der Schwangerschaft berichtet Unterschiede in der fetalen Gehirnstruktur.](https://nootropikler.com/de/news/mikhuna-prenatal-diet-fetal-brain-growth): In einer randomisierten Studie in Ecuador mit 215 Schwangerschaften war ein Ernährungsvielfaltsprogramm mit Wachstumsunterschieden in mehreren fetalen Gehirnstrukturen verbunden; die Studie maß Anatomie, nicht das spätere kognitive Leistungsvermögen. - [Probiotische Studie bei frühen kognitiven Beeinträchtigungen untersucht Kognition und Tau-Marker](https://nootropikler.com/de/news/multistrain-probiotics-early-cognitive-impairment): Eine 24-wöchige randomisierte Studie mit 87 Personen mit früher kognitiver Beeinträchtigung fand niedrigere pTau181-Werte und selektive visuell-räumliche Befunde, aber keine Unterschiede bei MMSE, verbalem Gedächtnis oder Exekutivfunktionen. - [Theta-Rhythmen können Erinnerungen für die Schlafkonsolidierung markieren](https://nootropikler.com/de/news/theta-rhythms-may-mark-memories-for-sleep-consolidation): Bei 31 jungen Erwachsenen verband das EEG während des Wort-Objekt-Lernens eine stärkere Theta-Aktivität mit späterer Schlafwellenkopplung und Gedächtnisspeicherung nach einem Nickerchen; die Assoziation stellt keine Kausalität dar. - [Wie das Abrufen einer Erinnerung eine Spur in der späteren Gehirnaktivität hinterlässt](https://nootropikler.com/de/news/recalling-a-memory-leaves-a-trace-in-brain-activity): In einem fMRT-Experiment beeinflussten Abrufhinweise spätere neuronale Muster für gelernte Bild-Wort-Paare, obwohl die Teilnehmenden im Gedächtnistest ähnlich abschnitten. - [Die FDA warnt vor Glutathion in Nahrungsergänzungsmittelqualität für Injektionen.](https://nootropikler.com/de/news/fda-glutathione-injection-quality-alert): Die FDA meldete Nebenwirkungen bei mindestens 30 Patienten nach intravenöser Gabe individuell hergestellter Glutathion-Präparate. Sie warnte davor, Glutathion in Nahrungsergänzungsmittelqualität für Injektionen zu verwenden. - [Rückenmarkstimulation mit Laufbandtraining zeigte begrenzte Gangwirkungen bei Parkinson.](https://nootropikler.com/de/news/parkinson-spinal-magnetic-stimulation-treadmill-trial): Eine randomisierte Parkinson-Studie mit 70 Personen fand kurzfristige Hinweise auf eine höhere Gehgeschwindigkeit und später auf weniger Gangblockaden nach Stimulation plus Laufbandtraining, jedoch keinen anhaltenden Gesamtnutzen. - [NIH-Bericht beschreibt Unterschiede in der DNA-Faltung beim Altern und bei Alzheimer ](https://nootropikler.com/de/news/nih-dna-organization-alzheimers-aging): Ein NIH-Bericht vom August hob veränderte DNA-Kontakte und Genaktivität in postmortalen präfrontalen Zellen von Alzheimer-Spendern hervor; die Studie belegt keine Kausalität. - [Glutamin veränderte während einer kurzen simulierten Hochgebirgsexposition weder Stimmung noch Kognition.](https://nootropikler.com/de/news/glutamine-hypoxia-cognition-rct): In einer randomisierten Studie mit jungen Männern veränderten sechs Stunden simulierte Hypoxie auf 4.500 m die psychobiologischen Maße nicht, und Glutamin-Supplementierung brachte keinen nachweisbaren Nutzen. - [Erdnussstudie fand keine signifikanten Vorteile für Kognition oder Gehirnaktivität.](https://nootropikler.com/de/news/peanut-consumption-memory-complaints-rct): Eine 12-wöchige Erdnussstudie mit 27 älteren Erwachsenen mit Gedächtnisbeschwerden fand keine signifikanten Gruppenunterschiede bei Kognition, Gehirnaktivität oder bereinigten Biomarkerwerten. - [Neuronen, die den vorherigen Wachzustand erfassen, regulieren den Schlafdruck bei Mäusen.](https://nootropikler.com/de/news/wake-history-neurons-regulate-sleep-drive-in-mice): Die Manipulation von weckreaktiven Neuronen bei Mäusen veränderte den NREM-Schlaf und den Schlafdruck und identifizierte Kandidatenschaltkreise für die Schlafregulation, ohne zu zeigen, dass reduzierter Schlaf sicher ist. - [Langlebige Gehirnorganoide zeigen Merkmale späterer menschlicher Entwicklung](https://nootropikler.com/de/news/nih-brain-organoids-long-term-maturation): Das NIH berichtete, dass aus Stammzellen gezüchtete Gehirnorganoide über fast sechs Jahre heranreiften und deren molekulares Alter mit der verstrichenen Zeit zunahm. Es handelt sich um Labormodelle. - [Die Gehirne von Mäusen nutzten wiederverwendete neuronale Komponenten über kognitive Operationen hinweg](https://nootropikler.com/de/news/reusable-modular-cognition-mouse-brain): Bei einer verzögerten Zuordnungsaufgabe nutzten Mäuse präfrontale und parietale neuronale Teilräume erneut für Reizverarbeitung und Gedächtniserhalt. Netzwerkmodelle stützen eine modulare Deutung; der Befund betrifft eine Aufgabe und belegt keine menschlichen Kognitionsmodule. - [Die Mittelmeerdiät verändert Stoffwechselmarker in einer Zwischenauswertung von MCI](https://nootropikler.com/de/news/mediterranean-diet-metabolomics-mci-interim): Bei 47 älteren Erwachsenen mit leichter kognitiver Beeinträchtigung veränderte eine 24-wöchige Mittelmeerdiät mehrere Plasmametaboliten. Einige Änderungen korrelierten mit kognitiven Werten; daraus folgt kein kognitiver Nutzen. - [Die FDA aktualisiert eine bestehende Einfuhrwarnung für Kratom mit einem Lieferanteneintrag im August.](https://nootropikler.com/de/news/fda-adds-kratom-supplements-to-import-detention-alert): Die Fassung des FDA Import Alert 54-15 vom 17. August führt einen neuen Lieferanten auf. Der Mechanismus zur Zurückhaltung bestimmter Kratom-Importe besteht bereits seit vor 2026. - [Studie zu proteinangereicherter mediterraner Ernährung berichtet bescheidene Unterschiede bei kognitiven Werten.](https://nootropikler.com/de/news/promed-protein-mediterranean-exercise-cognition): Eine sechsmonatige Studie mit 105 älteren Erwachsenen mit Risiko für Mangelernährung und kognitiven Abbau fand besseren Ernährungszustand und kleine Unterschiede bei neurokognitiven Werten in Ernährungsberatungsgruppen gegenüber einer Kontrollgruppe mit Informationsblatt. - [Studie zu präbiotisch ballaststoffangereichertem Brot untersucht Durchführbarkeit und Kognition bei älteren Erwachsenen.](https://nootropikler.com/de/news/prebiotic-fibre-bread-older-adults-feasibility): Eine Machbarkeitsstudie prüfte Brot mit zusätzlich 10 g präbiotischen Ballaststoffen pro Tag bei älteren Menschen mit üblicherweise geringer Ballaststoffzufuhr. Sie sollte die Durchführbarkeit und vorläufige Ergebnisse bewerten. - [Gedächtnisspuren blieben bei Mäusen während künstlich induziertem Winterschlaf erhalten](https://nootropikler.com/de/news/memory-traces-persist-after-artificial-hibernation-in-mice): Nach induzierter Winterschlaf in Mäusen blieben ausgewählte Erinnerungen trotz Verlust von mehr als der Hälfte der synaptischen Verbindungen im Hippocampus erhalten; gruppierte, erinnerungsbezogene Verbindungen wurden bevorzugt beibehalten. - [TIMP2 veränderte altersbedingte mikrogliäre Zustände bei Mäusen](https://nootropikler.com/de/news/timp2-microglia-aging-mouse-brain): TIMP2-Deletion verschlechterte bei Mäusen mehrere altersassoziierte Messgrößen zu Mikroglia; eine Behandlung alter Mäuse veränderte Entzündungsprofile und Phagozytose. Diese präklinischen Befunde zeigen keinen kognitiven Nutzen und belegen keine sichere Intervention beim Menschen. - [Eine kleine Studie verbindet Plasmalogene aus Jakobsmuscheln mit höheren verbalen Gedächtniswerten.](https://nootropikler.com/de/news/scallop-plasmalogens-verbal-memory-rct): Eine 12-wöchige Studie mit 68 ausgewählten japanischen Erwachsenen berichtete ein schwaches Signal für verbales Gedächtnis nach Einnahme von Plasmalogenen aus Jakobsmuscheln; längerfristige Effekte sind unbekannt. - [Mitteilung der University of Wisconsin beschreibt einen Darmmetaboliten im Zusammenhang mit Alzheimer-ähnlichen Veränderungen.](https://nootropikler.com/de/news/gut-imidazole-propionate-alzheimer-announcement): Eine Ankündigung der University of Wisconsin beschrieb ein von Darmbakterien erzeugtes Stoffwechselprodukt, das mit der Kognition bei Menschen und Alzheimer-ähnlichen Veränderungen in experimentellen Modellen in Verbindung steht; die Studie selbst wurde am 26. Juni veröffentlicht. - [Zwölfwöchige Kreatin-Studie berichtet über explorative kognitive Marker neben Veränderungen der Kraft](https://nootropikler.com/de/news/creatine-cognition-middle-aged-older-adults-rct): In einer 12-wöchigen Kreatin-Studie mit 64 Teilnehmenden, die sie abschlossen, waren kognitive Befunde explorativ; Sport- und Ernährungsteilnahme waren selbst gewählt. - [Endocannabinoid-Plastizität unterstützte Einmal-Lernen bei Mäusen](https://nootropikler.com/de/news/striatal-endocannabinoids-one-shot-learning-mice): Einmaliger kurzer Kontakt mit Klebeband führte bei Mäusen später zu Vermeidungsverhalten und kortikostriataler Plastizität; eine Störung des Endocannabinoidwegs beeinträchtigte das Lernen. Die aversive Lernaufgabe ist ein Tiermodell, kein Beleg für bessere menschliche Gedächtnisleistung. - [Pilotstudie findet nach Meditation und Atemübungen weniger Angst bei Parkinson.](https://nootropikler.com/de/news/parkinson-meditation-breathwork-anxiety-pilot-trial): In einer kleinen randomisierten Pilotstudie ging eine sechswöchiges Online-Programm mit Meditation und Atemübungen mit weniger Parkinson-bedingter Angst einher als eine Wartelistenkontrolle. Untersucht wurde Angst, nicht Kognition. - [Studie an menschlichem Gehirngewebe verbindet veränderte Glukosespeicherung mit Alzheimer-Pathologie](https://nootropikler.com/de/news/brain-glucose-glycogen-alzheimer-human-brains): Eine Untersuchung von 230 postmortalen Gehirnen brachte glykogenbezogene Strukturen mit Alzheimer-Tau-Pathologie in Verbindung, darunter Veränderungen in frühen pathologischen Stadien. Die Gewebeanalyse kann weder die zeitliche Reihenfolge bestimmen noch zeigen, ob eine Ernährungsänderung helfen würde. - [Digitales kognitives Training verbesserte die exekutiven Werte in einer kleinen RBD-Studie](https://nootropikler.com/de/news/cogtrail-rbd-cognitive-training-executive-function): Bei 82 Menschen mit isolierter REM-Schlaf-Verhaltensstörung war ein fünf Wochen dauerndes digitales Programm für kognitives Training und Lebensstilberatung mit bescheidenen Verbesserungen der exekutiven Funktionen im Vergleich zu einer Wartelistenkontrollgruppe verbunden. - [Ein holografisches Mikroskop erlaubte es Forschern, die Kommunikation zwischen Gehirnbereichen zu untersuchen.](https://nootropikler.com/de/news/two-photon-holographic-mesoscope-neural-circuits): Ein neues Zwei-Photonen-System stimulierte gezielt ausgewählte Mäuseneuronen über ein millimetergroßes Feld und bildete nachgeschaltete Reaktionen ab. Es ermöglicht Schaltkreisexperimente über größere Bereiche, bleibt aber ein spezialisiertes Forschungsinstrument ohne Anwendung am Menschen. - [Rehabilitation nach gerätegestützter Parkinsontherapie zeigte ein mögliches kognitives Signal.](https://nootropikler.com/de/news/parkinson-device-aided-therapy-rehabilitation-cognition): In einer offenen randomisierten Studie mit 54 Personen, die eine gerätegestützte Parkinsontherapie begannen, ging maßgeschneiderte Rehabilitation nach einem Jahr mit besserer Kognition einher. Dies war ein sekundärer Befund und muss bestätigt werden. - [Eine auf Koffein abgestimmte Studie zeigt keinen zusätzlichen Aufmerksamkeitsvorteil durch eine Energy-Drink-Formel](https://nootropikler.com/de/news/caffeine-matched-energy-drink-attention-trial): Bei 116 Erwachsenen verbesserte ein Energy-Drink Aufmerksamkeit oder Gedächtnis nach einer einzelnen Testsitzung nicht stärker als ein Getränk mit derselben Koffeinmenge (200 mg). - [Gedächtnisensembles bei Makaken unterschieden sich je nach Zeitabstand zum Lernen.](https://nootropikler.com/de/news/macaque-experience-reorganizes-memory-traces): Aufzeichnungen bei Makaken zeigten unterschiedliche Reaktivierung im Schlaf für neue, kürzlich und länger zurückliegend gelernte Sequenzen. Ältere Erinnerungen bildeten stabilere, stärker vernetzte neuronale Ensembles. Die querschnittliche Primatenstudie verfolgte keine Veränderungen einzelner Zellen über die Zeit. - [Forschende beschreiben mitochondriale Plaques in Alzheimer-Modellhirnen.](https://nootropikler.com/de/news/mitochondrial-plaques-alzheimers-neuronal-processes): Bei Alzheimer-Modellmäusen und postmortem menschlichem Gewebe identifizierten Forscher mitochondriale Ansammlungen in neuronalen Prozessen zusammen mit beeinträchtigter lysosomaler Clearance. Der Befund beschreibt Pathologie; er stellt keine Behandlung oder kognitive Wirkung dar. - [Eine vierwöchige 16:8-Essensfenster-Studie zeigte keinen zusätzlichen kognitiven Effekt. ](https://nootropikler.com/de/news/time-restricted-eating-working-memory-women): Bei 43 gesunden Frauen verbesserten sich Arbeitsgedächtnis und Aufmerksamkeit im Laufe der Zeit in beiden Gruppen, ohne signifikanten kognitiven Vorteil bei einer 16:8-zeitbeschränkten Ernährung gegenüber der üblichen Ernährung. - [Kleine GeNeurofil-Pilotstudie berichtet über kognitive und Biomarker-Veränderungen bei MCI](https://nootropikler.com/de/news/geneurofil-mci-pilot-trial): In einer sechsmonatigen Pilotstudie mit 54 Personen mit leichter bis mittelschwerer kognitiver Beeinträchtigung war GeNeurofil mit verbesserten Testergebnissen und niedrigeren Plasmaspiegeln assoziiert; die Autoren fordern größere bestätigende Studien. - [Kleine Alzheimer-Studie testet eine pflanzenreiche ketogene Ernährung in Kombination mit Fasten](https://nootropikler.com/de/news/plant-rich-ketogenic-fasting-alzheimer-trial): In einer sechsmonatigen Studie mit 60 Personen unter Standardversorgung bei Alzheimer stieg der mittlere MMSE-Wert in der kombinierten Interventionsgruppe, während er in der Kontrollgruppe sank. Die Studie kann die Effekte von Ernährung und Fasten nicht voneinander trennen. - [KI-gestützte Ernährungsstudie berichtet über kognitive Veränderungen bei unterernährten Bewohnern](https://nootropikler.com/de/news/ai-guided-nutrition-long-term-care-cognition): In einer gestuften Studie mit 108 Langzeitpflege-Bewohnern verbesserten sich Ernährungs- und Kognitionswerte nach individueller Lebensmittelunterstützung vor allem in der am stärksten unterernährten Gruppe. Das Studiendesign belegt nicht, dass die KI selbst die Veränderungen verursachte. - [Das Replay von Fertigkeitsmustern blieb bei Mäusen auch ohne Hippocampus bestehen.](https://nootropikler.com/de/news/procedural-memory-replay-independent-hippocampus): Im Schlaf spielten trainierte Mäuse Aktivitätssequenzen des dorsalen Striatums, die mit prozeduralem Lernen verbunden sind, auch nach Hippocampusläsionen erneut ab. Das Replay sagte spätere Lernzuwächse voraus; für eine kausale Rolle muss es gezielt unterbrochen werden. - [Ergänzungsbewertung zeigt gemischte kognitive Signale in Alzheimer- und MCI-Studien ](https://nootropikler.com/de/news/supplements-mci-alzheimer-network-review-2026): Eine Netzwerkübersicht über 29 Studien fand uneinheitliche Befunde in kognitiven Tests bei Alzheimer und leichter kognitiver Beeinträchtigung. Kein Supplement verbesserte ADAS-Cog signifikant. - [Menschliche Immunzellen im Hippocampus verändern sich in der Lebensmitte](https://nootropikler.com/de/news/human-hippocampus-immune-cells-shift-in-midlife): Postmortales Hippocampusgewebe von 40 Erwachsenen im Alter von 20–95 Jahren zeigte eine Veränderung der Immunzellpopulationen im mittleren Lebensalter, einschließlich weniger residenter Mikroglia und mehr entzündlicher, blutzellähnlicher Zellen. - [Online-Studien verknüpfen Long COVID mit niedrigeren Arbeitsgedächtniswerten](https://nootropikler.com/de/news/long-covid-linked-to-lower-working-memory-scores): In einer querschnittlichen Online-Studie mit 1.064 Personen war selbstberichtetes Long COVID mit niedrigeren Werten in einem kurzen visuellen Arbeitsgedächtnistest verbunden. Ein einzelner Test kann keine umfassende Beeinträchtigung diagnostizieren. - [Historische Zuckerrationierung stand mit Gehirnalterung und Gesundheit im späteren Leben in Zusammenhang.](https://nootropikler.com/de/news/early-life-sugar-rationing-brain-aging): Eine Studie als natürliches Experiment verglich Erwachsene, die in der frühen Kindheit eine Zuckerrationierung erlebt hatten, mit später geborenen Kohorten. Sie fand Zusammenhänge mit späterer Gehirnalterung und Gesundheit; das historische Studiendesign belegt keine Ursache durch die Ernährung. - [Die FDA schließt die Untersuchung des Salmonellenausbruchs im Zusammenhang mit MOGO-Moringa-Kapseln ab.](https://nootropikler.com/de/news/fda-closes-moringa-salmonella-outbreak-investigation): Der Abschlussbericht der FDA vom 17. Juli berichtete über 34 Erkrankungen und 11 Krankenhausaufenthalte, die mit bestimmten MOGO-Moringa-Kapselchargen in Verbindung stehen; zurückgerufene Bestände können noch in Haushalten vorhanden sein. - [Hippocampale Dendriten verarbeiten Lernsignale eigenständig.](https://nootropikler.com/de/news/hippocampal-dendrites-process-learning-signals): Spannungsbilder bei sich bewegenden Mäusen zeigten, dass einige dendritische Signale im Hippocampus CA3 sich vor dem Zellkörper in einer neuen Umgebung veränderten, was die lokale dendritische Verarbeitung unterstützt, ohne einen Gedächtnisvorteil zu beweisen. - [Hinweisgestützter Abruf steigerte den Gedächtnisgewinn bei wiederholten Tests.](https://nootropikler.com/de/news/cued-recall-format-increases-repeated-memory-retrieval): In vier Experimenten führten eingeschränkte Anfangsbuchstabenhinweise beim wiederholten Abruf zu größeren Verbesserungen als freier Abruf. Der Vorteil verschwand, als die Teilnehmenden in beliebiger Reihenfolge antworten konnten. - [Blut-p-tau217 war mit dem späteren Risiko kognitiver Beeinträchtigungen bei älteren Erwachsenen verbunden](https://nootropikler.com/de/news/blood-ptau217-predicts-risk-of-cognitive-impairment): Eine zusammengefasste Beobachtungsanalyse von 2.684 zunächst unauffälligen Erwachsenen zeigte, dass höheres Blut-p-tau217 mit einem späteren größeren Risiko für kognitive Beeinträchtigungen verbunden ist; die 10-Jahres-Schätzungen für die höchste Gruppe waren weniger sicher. - [Die LatAm-FINGERS-Studie testet ein multidimensionales Programm für das Risiko eines kognitiven Abbaus](https://nootropikler.com/de/news/latam-fingers-lifestyle-cognition-trial): Eine große randomisierte Studie in Lateinamerika prüfte Bewegung, Ernährung, kognitives Training und Gefäßrisikomanagement bei gefährdeten älteren Erwachsenen. Die Intervention brachte einen moderaten Vorteil beim primären kognitiven Ergebnis. - [Ceperognastat verlangsamte das klinische Fortschreiten in einer Alzheimer-Studie nicht](https://nootropikler.com/de/news/ceperognastat-alzheimers-phase2-trial-no-clinical-benefit): In einer Phase-2-Studie mit 327 Personen verlangsamte Ceperognastat die frühe symptomatische Alzheimer-Erkrankung über 100 Wochen nicht in klinisch relevantem Maß; bei der höheren Dosis verlief die modellierte Verschlechterung schneller als unter Placebo. - [Die DEA leitet das Verfahren zur Einstufung konzentrierter 7-OH-Produkte ein.](https://nootropikler.com/de/news/dea-begins-7-oh-scheduling-process): Das Update der FDA vom 13. Juli beschrieb einen Vorschlag zur vorübergehenden Einstufung von konzentrierten 7-OH- und synthetischen Derivaten und unterschied den Prozess von einem endgültigen Erlass. - [Zufällige Geräusche während eines Nickerchens störten langsame Wellen und das Erinnerungsvermögen.](https://nootropikler.com/de/news/random-sleep-audio-disrupted-slow-waves-and-recall): In einer Nickerchenstudie mit zwei Sitzungen und 20 gesunden Männern verringerten zufällig gesetzte Geräusche den Tiefschlaf und beeinträchtigten das figural-assoziative Erinnern, nicht aber das verbale oder prozedurale Gedächtnis. Die Arbeit erschien am 25. Juni; Freiburg kündigte sie am 9. Juli an. - [Ein regionales Gehirnalter-Muster verband einen Blut-Tau-Marker mit der Kognition](https://nootropikler.com/de/news/regional-brain-age-pattern-links-tau-marker-and-cognition): Eine Querschnittsanalyse von 71 älteren Erwachsenen fand einen indirekten Zusammenhang zwischen p-tau217 und Kognition über ein MRT-Muster des Gehirnalters. Direkte und Gesamtzusammenhänge waren nicht signifikant. - [Geräusche während des Schlafs störten bei Ratten die hippocampale Gedächtniskonsolidierung.](https://nootropikler.com/de/news/sleep-noise-interrupts-hippocampal-memory-consolidation-in-rats): Bei schlafenden Ratten verringerten kurze, auf hippocampale Sharp-Wave-Ripples abgestimmte Töne die Ripple-Aktivität und störten das Behalten in einer Gedächtnisaufgabe. Die Effekte unterschieden sich je nach Aufgabe. - [Zwei MRT-Marker standen in Zusammenhang mit dem kognitiven Fortschreiten bei früher MS](https://nootropikler.com/de/news/multiple-sclerosis-mri-markers-cognitive-progression): Bei 87 Personen mit früher schubförmig-remittierender Multipler Sklerose waren MRT-Marker bei der Diagnose auch nach Berücksichtigung von Schüben und MRT-Aktivität mit späterem kognitivem Abbau verbunden. - [Angereichertes Maismehl verbesserte die kognitiven Werte jugendlicher Mädchen in einer äthiopischen Studie nicht.](https://nootropikler.com/de/news/vitamin-fortified-corn-flour-teen-cognition-ethiopia): Eine sechsmonatige Studie mit 472 Mädchen fand keinen signifikanten kognitiven Nutzen von Folsäure- und B12-angereichertem Maismehl. In einer Sekundäranalyse nach Ausmaß der Wachstumsverzögerung zeigte sich ein Unterschied im Sprachtest. - [Höherer Konsum stark verarbeiteter Lebensmittel war in einer australischen Kohorte mit geringerer Aufmerksamkeit verbunden.](https://nootropikler.com/de/news/ultra-processed-foods-attention-apoe4): Eine Querschnittsanalyse von 2.192 australischen Erwachsenen brachte einen höheren Anteil stark verarbeiteter Lebensmittel mit einem leicht niedrigeren Aufmerksamkeitswert in Verbindung. Ein klarer Zusammenhang mit dem Gedächtnis zeigte sich nicht; Kausalität lässt sich nicht belegen. - [Die FDA beanstandet Behandlungsversprechen eines Grüntee-Anbieters zu Alzheimer, Parkinson und Angstzuständen.](https://nootropikler.com/de/news/fda-warns-green-tea-seller-over-disease-treatment-claims): In einem Schreiben vom 2. Juli beanstandete die FDA Alzheimer-, Parkinson- und Angstbehandlungs-Behauptungen eines Verkäufers zu Grüntee. Es geht um Vermarktung und Arzneimittelzulassung, nicht um eine neue Wirksamkeitsstudie. - [Blutmarker bei Alzheimer in der Lebensmitte im Zusammenhang mit kognitiven Werten in der Kohorte ](https://nootropikler.com/de/news/nih-midlife-alzheimer-biomarkers-cognition): Ein NIH-Bericht vom Juli hob eine CARDIA-Kohortenstudie hervor, die Blutmarker für Amyloid und Tau mit kognitiven Unterschieden im mittleren Lebensalter in Verbindung brachte. Die Ergebnisse sind beobachtend. - [Aus MCT abgeleitete Ketone wurden als alternative Gehirntreibstoffquelle während Hypoglykämie untersucht ](https://nootropikler.com/de/news/mct-ketones-hypoglycemia-working-memory-t1d): Eine kleine Humanstudie brachte vier Wochen MCT-Ernährung mit höherer Arbeitsgedächtnisgenauigkeit während induzierter Hypoglykämie bei Typ-1-Diabetes in Verbindung; die Reaktionszeit verbesserte sich nicht. - [Hippocampale Theta-Wellen sagten bei Ratten Routen zu erinnerten Zielen voraus.](https://nootropikler.com/de/news/goal-directed-hippocampal-theta-navigation): Bei Ratten sagten lernabhängige hippocampale Theta-Sequenzen in einer offenen Arena Routen zu erinnerten Zielen voraus und koordinierten sich mit präfrontaler Aktivität. Das weist auf einen möglichen Planungskreislauf hin, belegt aber nicht, dass die Sequenzen die Navigation verursachen. ## Nootropik News — Français - [Les changements d'humeur et les pensées intrusives étaient liés à la mémorisation des actions prévues](https://nootropikler.com/fr/news/affective-changes-intrusive-thoughts-prospective-memory): Chez 120 adultes, 117 ont participé aux analyses de mémoire prospective. Humeur et contrôle des pensées intrusives étaient associés à la performance ; les résultats ne prouvent ni causalité ni traitement des troubles de mémoire. - [Nature Neuroscience ouvre un numéro spécial sur la neurotechnologie et les interfaces cerveau-ordinateur](https://nootropikler.com/fr/news/neurotechnology-special-issue-editorial-october-2026): Un éditorial du 1er octobre introduit un numéro spécial sur la manière dont la neurotechnologie relie la recherche sur le cerveau, les dispositifs d’assistance et les questions de gouvernance des données ; il s’agit d’un aperçu éditorial, pas d’une nouvelle expérience. - [Les schémas de connectivité cérébrale différaient entre la pathologie d'Alzheimer et le vieillissement](https://nootropikler.com/fr/news/alzheimer-connectivity-gradients-aging-biofinder-adni): Les analyses IRM dans BioFINDER-2 et ADNI ont lié la pathologie d'Alzheimer et l'âge à différents gradients de connectivité du cortex entier. Les résultats de la cohorte décrivent des associations et n'établissent pas un test diagnostique ni un mécanisme causal. - [Un petit essai sur un mélange de cassis révèle des changements d’attention sélectifs chez les personnes âgées](https://nootropikler.com/fr/news/blackcurrant-theanine-pine-bark-attention-crossover): Essai croisé avec 26 adultes âgés : quatre semaines de mélange de cassis, L-théanine, extrait de pin ou placebo. Les fausses alertes ont baissé. Mémoire et fatigue n’étaient pas significatives après correction des comparaisons multiples ; le mélange ne permet pas d’isoler un ingrédient. - [Un modèle d’apprentissage automatique a estimé l’altération cognitive future dans la maladie de Parkinson](https://nootropikler.com/fr/news/parkinsons-tabpfn-cognitive-impairment-prediction): Une étude rétrospective a rapporté des AUC de 0,822 en interne et de 0,742 dans une cohorte externe pour un modèle TabPFN. Les auteurs indiquent qu'une validation prospective multicentrique est nécessaire avant toute utilisation clinique. - [Les populations de neurones de l’hippocampe humain transportaient des informations sur le sens des mots](https://nootropikler.com/fr/news/human-hippocampus-distributed-semantic-code): Les enregistrements effectués lors de l'écoute narrative ont lié des motifs d'activité hippocampique distribués à la sémantique des mots, y compris après que les analyses ont tenu compte de la phonétique et de la grammaire. - [Un essai court sur la cardamome noire rapporte de meilleurs tests d’attention, avec un financement industriel](https://nootropikler.com/fr/news/black-cardamom-extract-short-attention-trial): Un essai de 14 jours a randomisé 96 adultes pour recevoir de l'extrait de cardamome noire, de la caféine, leur association ou un placebo ; 85 sont entrés dans l’analyse finale. Les gains de tests rapportés nécessitent une réplication indépendante et n’établissent pas de bénéfice cognitif durable. - [La correspondance des conditions de masque a aidé la reconnaissance dans l'une des deux expériences de mémoire faciale](https://nootropikler.com/fr/news/masked-face-recognition-context-congruency): Deux expériences utilisant des images réelles à basse résolution ont montré un avantage de congruence lorsque des visages masqués étaient encodés dans la première expérience, mais pas dans la seconde. La précision était globalement modeste. - [Une étude sur la souris lie la voie indole des bactéries intestinales aux lésions cérébrales par AVC et à la réponse immunitaire](https://nootropikler.com/fr/news/gut-microbiota-indole-stroke-severity-immune-response): Chez la souris, la signalisation bactérienne par l’indole influençait l’activité immunitaire après un AVC et les lésions cérébrales. Une cohorte de patients a associé l’abondance de tnaA bactérienne à de moins bons résultats ; ce mécanisme n’est pas démontré chez l’humain. - [Les enregistrements cérébraux ont cartographié les signaux partagés et distincts pour la parole imaginée et la parole prononcée](https://nootropikler.com/fr/news/imagined-speech-neural-architecture-ecog): Des enregistrements à haute densité pendant une chirurgie éveillée ont révélé des signaux de planification communs et des profils sensorimoteurs distincts pour les syllabes imaginées et prononcées. Ce résultat pourrait éclairer de futures interfaces vocales. - [L’anesthésie présentait une signature de dynamique neuronale commune à six espèces](https://nootropikler.com/fr/news/cross-species-neural-dynamics-under-anesthesia): Une analyse inter-espèces des enregistrements cérébraux a révélé des échelles de temps neuronales locales plus courtes et une synchronie interrégionale plus faible sous anesthésie ; la stimulation thalamique a inversé le schéma chez les macaques. - [L'utilisation de la télévision et de l'ordinateur a montré des liens opposés avec la cognition chez les personnes âgées](https://nootropikler.com/fr/news/screen-time-types-and-cognition-older-adults): Dans quatre cohortes de personnes âgées, un temps de télévision plus élevé était associé à des scores cognitifs plus faibles, tandis que l’usage de l’ordinateur était associé à des scores plus élevés. La randomisation mendélienne apporte des éléments favorables, dépendants de ses hypothèses. - [Un stimulateur sans batterie alimenté par radio fonctionne chez des souris en mouvement libre](https://nootropikler.com/fr/news/wireless-rf-neurostimulation-freely-moving-mice): Une étude sur un dispositif animal a testé un stimulateur transcrânien sans fil alimenté par des ondes radio rayonnées ; il a maintenu sa puissance à travers une cage et provoqué des mouvements circulaires lorsqu’il était dirigé vers une région motrice. - [L’incertitude de l’environnement a réduit l’effort de planification dans une tâche humaine](https://nootropikler.com/fr/news/environmental-stochasticity-reduces-human-planning-effort): À travers trois formes d’incertitude environnementale, les participants planifiaient moins, réagissaient plus rapidement et utilisaient des politiques de décision plus simples, moins sensibles aux valeurs des options. - [Aucune différence cognitive liée à APOE ε4 n’a été détectée chez de jeunes adultes en bonne santé](https://nootropikler.com/fr/news/apoe4-young-adult-cognition-navigation-null): Parmi 1 000 adultes en bonne santé âgés de 18 à 35 ans, les porteurs de ε3ε4 ne différaient pas de manière détectable des porteurs de ε3ε3 en matière de navigation ou de plusieurs tâches cognitives. Le résultat s'applique à cet échantillon et à cette tranche d'âge. - [Les couches corticales évoluaient différemment à mesure que les souris apprenaient une tâche utilisant les vibrisses](https://nootropikler.com/fr/news/cortex-wide-laminar-dynamics-learning-mice): L’imagerie grand champ de 25 aires corticales a révélé, chez des souris mâles apprenant une tâche utilisant les vibrisses, des changements d’activité distincts et parfois opposés dans les couches 2/3 et 5. L’étude décrit ces dynamiques sans isoler toutes les contributions causales. - [Microbiote intestinal et acide indole-3-lactique liés à la récupération cognitive dans une étude sur les lésions vasculaires](https://nootropikler.com/fr/news/gut-ila-axis-vascular-cognitive-impairment): Une cohorte clinique et des expériences sur des souris ont lié le métabolisme microbien du tryptophane à la cognition et à la fonction glymphatique. Les observations cliniques étaient exploratoires ; les preuves issues de l'intervention provenaient des souris. - [La voie amygdale-striatum modulait le comportement répétitif chez la souris](https://nootropikler.com/fr/news/amygdala-striatum-circuit-repetitive-behavior-mice): Une étude chez la souris a cartographié une projection directe amygdale–striatum dorsolatéral qui modulait le toilettage déclenché par un stimulus et était renforcée dans un modèle de toilettage compulsif. Il s'agit d'une découverte de circuit chez l'animal, et non d'une preuve de cause ou de traitement chez l'homme. - [De petites biopsies cérébrales chez des patients vivants offrent un aperçu direct de la pathologie d’Alzheimer](https://nootropikler.com/fr/news/alzheimer-pathology-living-brain-biopsy-proteomics): Chez 18 personnes subissant une chirurgie de dérivation pour une suspicion d'hydrocéphalie à pression normale, les chercheurs ont trouvé des plaques amyloïdes dans neuf biopsies et ont cartographié la chimie des plaques et le turnover de la protéine tau. L'échantillon chirurgical sélectionné limite la généralisation. - [Les macaques rhésus ajustaient la vitesse de décision de manière liée à la précision](https://nootropikler.com/fr/news/macaques-metacognitive-control-decision-accuracy): Dans une tâche à deux choix, les macaques rhésus étaient plus précis lors de réponses plus rapides, même après avoir pris en compte la difficulté. Un modèle de surveillance pourrait expliquer ce schéma, bien qu'il ne prouve pas directement la confiance subjective. - [L'atlas soutenu par le NIH cartographie l'activité cellulaire dans les troubles cérébraux](https://nootropikler.com/fr/news/nih-single-cell-atlas-brain-disorders): Les NIH ont annoncé des cartes moléculaires construites à partir de plus de 6,3 millions de noyaux cellulaires et 1 494 donneurs, fournissant une ressource de recherche pour la maladie d'Alzheimer et les troubles cérébraux connexes. - [L'analyse des biomarqueurs COSMOS ne trouve aucun effet sur deux ans des multivitamines ou de l'extrait de cacao](https://nootropikler.com/fr/news/cosmos-multivitamin-cocoa-neurodegeneration-biomarkers): Dans une sous-étude d’essai randomisé chez des personnes âgées, ni une multivitamine ni l’extrait de cacao n’ont modifié trois biomarqueurs sanguins en deux ans par rapport au placebo. Ces résultats ne permettent pas de conclure sur d’éventuels effets cognitifs par d’autres voies. - [La stimulation ciblée sur le striatum a modifié les choix concernant l'effort mental dans une étude humaine](https://nootropikler.com/fr/news/temporal-interference-stimulation-mental-effort): Dans une petite expérience avec des adultes en bonne santé, la stimulation par interférence temporelle a modifié la manière dont les participants évaluaient les récompenses et l'effort cognitif, parallèlement à des changements dans les signaux striataux et cingulaires. - [Les estimations de l’attention visuelle n’étaient pas clairement interchangeables entre deux tâches](https://nootropikler.com/fr/news/visual-attention-estimates-depend-on-task): Trente participants ont effectué deux tâches d'attention visuelle. Les estimations ont en moyenne été de 58 Hz pour l'une et de 49 Hz pour l'autre, mais les analyses n'ont pas établi de différence claire ni d'égalité. - [Un régime MIND composé de repas a amélioré les scores cognitifs dans un petit essai sur le trouble cognitif léger](https://nootropikler.com/fr/news/mind-based-diet-mci-cluster-rct-korea): Dans un essai ouvert de 12 semaines mené en Corée auprès de 80 adultes présentant un trouble cognitif léger, les deux groupes ayant reçu des repas selon le régime MIND ont amélioré leurs scores K-MMSE2 par rapport au groupe témoin ; le résumé ne donne pas la taille de l’effet. - [Petite cohorte humaine liant l’exposition aux polluants, les microbes intestinaux et les mesures de l’attention](https://nootropikler.com/fr/news/pah-gut-microbiome-attention-impulsivity-cohort): Chez 34 adultes, l'exposition mesurée aux hydrocarbures aromatiques polycycliques, les profils microbiens et les groupements neurocomportementaux covariaient. Aucun genre microbien individuel n'a survécu à la correction en tant qu'associé au groupement comportemental, donc les liens candidats restent exploratoires. - [Les signaux réciproques du cortex visuel ont aidé les zones cérébrales de la souris à s'accorder](https://nootropikler.com/fr/news/reciprocal-visual-cortex-connections-consensus): Les enregistrements chez la souris, les perturbations optogénétiques et les modèles de circuit suggèrent que les connexions V1–LM prolongent l’activité visuelle cohérente et aident à résoudre les signaux contradictoires. Le résultat porte sur une tâche visuelle simple et une interprétation fondée sur un modèle. - [Un programme associant adaptation prismatique et jeu a amélioré certains scores cognitifs après un AVC](https://nootropikler.com/fr/news/mindlenses-poststroke-cognitive-rehabilitation-trial): Dans un essai randomisé sur l'AVC incluant 60 personnes, un dispositif d'adaptation prismatique et de jeu sur tablette a amélioré la mémoire à partir de trois mois et le langage lors des contrôles post-traitement par rapport à la rééducation standard. - [La fatigue quotidienne et une performance plus rapide qu’à l’habitude précédaient une moindre résistance à la fatigue](https://nootropikler.com/fr/news/fatigue-processing-speed-override-daily-life): Une analyse coordonnée de six études en conditions réelles a observé qu’une fatigue et une vitesse de traitement supérieures aux niveaux habituels prédisaient, quelques heures plus tard, un couplage plus fort entre fatigue et performance, marqueur d’une moindre capacité à surmonter la fatigue. - [La FDA étend son alerte au laurier-rose jaune toxique aux produits Niwali et Easy Forte](https://nootropikler.com/fr/news/fda-yellow-oleander-niwali-easy-forte-alert): La FDA a ajouté Niwali Tejocote Pieces, Niwali Tejocote Capsules et Easy Forte Natural Fiber à une alerte de sécurité après la détection de laurier jaune toxique. Elle recommande d’arrêter leur utilisation et de contacter un professionnel de santé. - [Un profil de métabolites sanguins associe l’adhésion au régime méditerranéen à certaines mesures cognitives](https://nootropikler.com/fr/news/mediterranean-diet-metabolite-signature-cognition-cohorts): Une étude à deux cohortes a établi une signature sanguine de 23 métabolites associée à l'adhésion au régime méditerranéen et à certaines mesures cognitives. Le transfert vers la deuxième cohorte était faible jusqu'à ce que le modèle soit recalibré, et l'étude était observationnelle. - [Les astrocytes ont formé des séquences d'activité temporisées lors du rappel de mémoire chez la souris](https://nootropikler.com/fr/news/hippocampal-astrocyte-sequences-memory-mice): L'imagerie chez la souris a montré des séquences de calcium des astrocytes de l'hippocampe CA1 comprimées pendant le conditionnement à la peur et leur réapparition dans le contexte conditionné. Les enregistrements sont corrélationnels et ne montrent pas que les astrocytes créent ou sont nécessaires à la mémoire. - [Les changements de mémoire de reconnaissance ont suivi la progression dans une cohorte précoce d’Alzheimer](https://nootropikler.com/fr/news/alzheimer-recognition-memory-progression-cohort): Une étude de 24 mois portant sur 278 personnes âgées présentant un trouble cognitif léger amnésique a révélé qu'une moindre capacité de discrimination de la reconnaissance et un déclin précoce prédisaient la conversion vers la démence Alzheimer après ajustement pour d'autres mesures. - [Chez la souris, des cellules cérébelleuses prédisaient les récompenses après une stimulation neuronale différée](https://nootropikler.com/fr/news/cerebellar-dopamine-reward-prediction-mice): Chez la souris, les cellules granulaires du cervelet prédisaient les récompenses différées après stimulation des neurones dopaminergiques ou du faisceau prosencéphalique médian ; les fibres grimpantes répondaient ensuite. Les perturbations étayent un rôle dans cette tâche, sans établir d’effet sur la cognition humaine. - [Le désavantage social était associé à une mémoire autoévaluée durablement plus faible dans une vaste cohorte](https://nootropikler.com/fr/news/social-disadvantage-subjective-memory-longitudinal-cohort): À travers six vagues de données provenant de 14 938 adultes chinois âgés de 45 ans et plus, un désavantage social accumulé était associé à une mémoire auto-évaluée persistante plus faible, qui corrélait faiblement avec la cognition objective. - [Les algorithmes d'interface cerveau-ordinateur adaptatifs ont remodelé l'apprentissage neuronal chez les singes](https://nootropikler.com/fr/news/assistive-algorithms-shape-bci-learning): Les enregistrements longitudinaux et un modèle de réseau neuronal suggèrent que les décodeurs BCI adaptatifs concentraient l'information de la tâche dans moins de signaux neuronaux pendant la pratique, contrairement aux décodeurs fixes. - [L'efficacité du sommeil, plutôt que sa durée, a suivi les scores exécutifs sur deux ans](https://nootropikler.com/fr/news/sleep-efficiency-executive-function-repeated-cohort): Parmi 233 adultes âgés de 55 ans et plus, une efficacité du sommeil mesurée par des dispositifs portables plus élevée était associée à une meilleure fonction exécutive, tandis que la durée du sommeil et la qualité auto-évaluée n'avaient pas de lien significatif avec les domaines cognitifs. - [Un implant cérébral a décodé la parole et les gestes ensemble dans une étude sur la paralysie](https://nootropikler.com/fr/news/speech-gesture-paralysis-brain-computer-interface): Une étude avec trois participants a utilisé un implant cortical pour décoder la parole et les gestes tentés, montrant une preuve de concept pour une communication plus naturelle via une interface cerveau-ordinateur. - [Chez la souris, des codes hippocampiques ventraux qui se chevauchent suivaient la récupération rapide de souvenirs de peur](https://nootropikler.com/fr/news/ventral-hippocampus-overlapping-fear-memory-codes): L’imagerie du calcium chez la souris a montré que l’apprentissage de la peur rendait les représentations de contexte menaçant et neutre plus similaires dans le CA1 ventral, où l’activité liée à la menace revenait rapidement lors de la récupération. - [Examine les preuves observationnelles sur la choline alimentaire et la cognition](https://nootropikler.com/fr/news/dietary-choline-cognition-observational-evidence-review): Une revue systématique et une méta-analyse dose-réponse ont évalué des études observationnelles sur la choline alimentaire et les résultats cognitifs. Les preuves concernent des associations dans les études existantes, et non si les suppléments de choline préviennent le déclin. - [L'apprentissage de la peur a modifié les synapses inhibitrices dans différentes parties des neurones CA1 de la souris](https://nootropikler.com/fr/news/ca1-inhibitory-synapses-remodel-with-fear-learning): L'imagerie longitudinale a révélé que le conditionnement de peur par trace réorganisait les synapses inhibitrices dendritiques mais stabilisait celles au niveau du segment initial de l'axone des neurones pyramidaux de l'hippocampe. - [L'insécurité alimentaire et le stress étaient associés à des différences dans les tâches cognitives chez les étudiants universitaires](https://nootropikler.com/fr/news/food-insecurity-stress-college-student-cognition): Une étude transversale menée auprès de 230 étudiants a associé l’insécurité alimentaire et le stress à des résultats différents à des tâches d’attention, de prise de décision et d’appariement mnésique. Ces associations ne prouvent pas que l’accès à la nourriture explique les résultats aux tests. - [Les études sur l'exercice indiquent des schémas d'activation cérébrale distincts pour la mémoire de travail](https://nootropikler.com/fr/news/exercise-working-memory-fmri-meta-analysis): Une méta-analyse de la probabilité d'activation de 11 études IRMf a trouvé des changements d'activation partiellement différents après des interventions d'exercice et chez les personnes pratiquant un exercice à long terme. La base de preuves limitée rend les cartes exploratoires. - [La méta-analyse trouve des signaux cognitifs modestes des régimes cétogènes, avec des compromis lipidiques](https://nootropikler.com/fr/news/ketogenic-diet-cognitive-impairment-meta-analysis): Une revue de 12 essais a trouvé des signaux cognitifs combinés chez des adultes âgés présentant des troubles cognitifs, ainsi qu’un cholestérol total et un LDL-C plus élevés. - [Une étude post-COVID rapporte des liens entre les microbes intestinaux et les mesures d'imagerie cérébrale](https://nootropikler.com/fr/news/post-covid-gut-microbiome-brain-imaging-associations): Une petite étude transversale a associé les profils du microbiote intestinal aux symptômes et aux mesures IRM après une infection par le COVID. Elle ne montre pas que le microbiote a causé des changements cérébraux ou des symptômes. - [Une étude pilote sur les troubles prolongés de la conscience évalue la stimulation au voisinage d’un nerf comme mesure EEG](https://nootropikler.com/fr/news/near-nerve-stimulation-consciousness-assessment): Un essai pilote monocentrique a comparé la stimulation nerveuse à la stimulation cutanée chez 19 personnes présentant des troubles prolongés de la conscience ; les auteurs appellent à une validation externe de la mesure basée sur l'EEG. - [Une charge tau frontale plus élevée était associée à des ondes lentes de sommeil moins étendues et à une mémoire nocturne moins bonne](https://nootropikler.com/fr/news/frontal-tau-linked-to-disrupted-sleep-waves-and-memory): Dans des cohortes d’adultes âgés étudiées par TEP tau, EEG et marqueurs du liquide céphalorachidien, une charge tau frontale plus élevée était associée à des ondes lentes de sommeil se propageant moins loin et à une mémoire nocturne moins bonne. - [La solitude persistante est associée à une santé plus mauvaise dans une cohorte de personnes âgées](https://nootropikler.com/fr/news/loneliness-isolation-trajectories-older-adult-health): Une analyse longitudinale de 4 090 adultes anglais a lié la solitude chronique à une santé physique et mentale plus médiocre. Mettre fin à l’isolement était associé à une meilleure cognition, mais les données observationnelles ne permettent pas d’établir un lien de cause à effet. - [Une cohorte à long terme sépare la pathologie de la maladie d'Alzheimer de la résilience cognitive](https://nootropikler.com/fr/news/alzheimer-pathology-cognitive-resilience-longitudinal-risk): Chez 3 119 adultes âgés suivis pendant une médiane de 13,7 ans, la pathologie et une mesure dérivée de la résilience cognitive suivaient indépendamment le risque de démence ; l'analyse observationnelle ne montre pas de causalité. - [La soif lors du cyclisme par temps chaud a affecté les scores de concentration, pas les scores des tests exécutifs](https://nootropikler.com/fr/news/thirst-satiation-heat-exercise-executive-function): Chez 12 hommes, l'eau et le sérum physiologique intraveineux ont produit une hydratation similaire, mais le sérum physiologique a laissé les participants plus assoiffés et plus soumis au stress thermique ; les scores aux tâches Flanker et de l'humeur ne différaient pas. - [L'apprentissage des odeurs a réorganisé les représentations neuronales chez le poisson-zèbre](https://nootropikler.com/fr/news/odor-learning-reorganizes-brain-representations-in-zebrafish): L'entraînement à la discrimination des odeurs chez les poissons-zèbres juvéniles et adultes a augmenté la séparation des schémas neuronaux pertinents pour la tâche dans le pDp, et cette géométrie représentative suivait la performance individuelle. - [L’interférence entre caractéristiques était associée à des erreurs de décision lorsque les indices de tâche étaient incertains](https://nootropikler.com/fr/news/feature-interference-cost-of-task-uncertainty): Le comportement humain, les enregistrements de V1 de singe et la modélisation ont lié l'incertitude quant à la tâche perceptuelle à effectuer à un codage plus fort des caractéristiques non pertinentes et à des représentations neuronales moins distinctes. - [De rares neurones inhibiteurs corticaux ont favorisé l’activité corticale synchronisée et le sommeil chez la souris](https://nootropikler.com/fr/news/cortical-sst-chodl-neurons-promote-sleep-mice): L’activation sélective des neurones inhibiteurs Sst-Chodl a favorisé la synchronisation corticale et le sommeil chez la souris. L’article publié en septembre prolonge des travaux sur les circuits déjà disponibles en prépublication ; il ne démontre pas de traitement du sommeil chez l’humain. - [La conception d'électrode submicronique autonome vise des enregistrements flexibles de la surface cérébrale](https://nootropikler.com/fr/news/submicron-ecog-electrode-array): Des ingénieurs ont annoncé un réseau d'électrocorticographie mince et autoportant inspiré de la structure des ailes de libellule, répondant à un compromis de matériaux pertinent pour les futures interfaces cerveau-ordinateur. - [Le processus mitochondrial lié à tau réduit les déficits dans des modèles animaux](https://nootropikler.com/fr/news/nih-tau-mitochondria-reverse-electron-transport): Les NIH ont mis en avant des expériences reliant la tau altérée au transport inverse des électrons mitochondriaux ; le blocage de cette voie a aidé les modèles, pas les patients lors d'un essai clinique. - [Un programme communautaire de rééducation de la maladie de Parkinson a été suivi de meilleurs scores aux tests cognitifs](https://nootropikler.com/fr/news/parkinsons-pd-core-cognitive-rehabilitation): Dans une étude pré-post de 45 personnes, un programme de groupe de sept séances a été suivi par des améliorations aux tests de cognition globale et de jugement pratique. Sans groupe de contrôle, l'étude ne peut pas distinguer les effets du traitement de ceux de la pratique ou d'autres changements. - [Un profil de santé multidimensionnel était associé au vieillissement cognitif dans trois cohortes](https://nootropikler.com/fr/news/intrinsic-capacity-profile-cognitive-aging-three-cohorts): Chez 26 022 adultes de trois cohortes sur le vieillissement, des limitations dans des domaines de santé non cognitifs étaient associées à des scores cognitifs plus faibles et à un risque accru de déclin cognitif ultérieur. - [L'étude relie des siestes plus longues à une vitesse de traitement plus lente chez les personnes âgées](https://nootropikler.com/fr/news/pointer-zzz-napping-apnea-cognition): Une analyse initiale de 686 participants âgés de l’étude américaine POINTER a associé les siestes diurnes plus longues à une vitesse de traitement plus faible ; aucun lien de causalité ni aucune interaction avec l’apnée n’ont été établis. - [La cohorte UK Biobank lie la densité de niacine alimentaire à la cognition et au risque de démence](https://nootropikler.com/fr/news/niacin-diet-density-cognition-dementia-cohort): Une grande étude de cohorte populationnelle a examiné les équivalents de niacine dans l'alimentation en relation avec la fonction cognitive et l'incidence de la démence ; sa conception observationnelle ne peut pas démontrer qu'augmenter la niacine prévient le déclin. - [L'analyse multi-omique propose des candidats biomarqueurs de la maladie de Parkinson liés aux stades](https://nootropikler.com/fr/news/parkinsons-proteo-metabolomic-stage-biomarkers): Une analyse secondaire des données de l’Initiative des marqueurs de progression de Parkinson a combiné protéines et métabolites du LCR et du plasma pour repérer des marqueurs candidats. Ces résultats exploratoires d’apprentissage automatique nécessitent une validation clinique indépendante. - [Des souvenirs distincts étaient liés à une attention visuelle plus précise](https://nootropikler.com/fr/news/distinct-memories-help-focus-on-visual-targets): Dans une tâche de recherche visuelle avec IRMf humaine et suivi oculaire, des motifs mnésiques hippocampiques plus distincts étaient associés à des mouvements oculaires guidés par la mémoire plus précis et à une activation moindre des concurrents. - [SUPPLX rappelle deux produits après la découverte de yohimbine non déclarée](https://nootropikler.com/fr/news/fda-recalls-products-undeclared-yohimbine): SUPPLX a volontairement rappelé Business Pill et Branch Manager for Men après que des tests ont identifié de la yohimbine non déclarée ; la FDA a publié l'avis le 4 septembre. - [La pratique structurée précoce a façonné l'apprentissage flexible chez les souris](https://nootropikler.com/fr/news/structured-practice-shaped-flexible-learning-in-mice): Chez la souris apprenant une tâche de temporisation, des exemples précoces structurés ont soutenu des stratégies ultérieures plus flexibles et l'activité entorhinale liée à la tâche ; l'étude a également testé les prédictions d'un modèle de réseau de neurones. - [Une enquête européenne établit un lien entre un sommeil très long et les siestes diurnes avec des troubles cognitifs](https://nootropikler.com/fr/news/european-sleep-duration-cognition-share-analysis): Une analyse transversale de 88 889 entretiens SHARE a associé un sommeil d'au moins 10 heures et la sieste diurne à une cognition plus faible ; elle ne peut pas établir si les habitudes de sommeil causent une déficience. - [Un petit essai contrôlé par stimulation simulée rapporte des gains cognitifs après stimulation cérébelleuse chez des patients atteints d’Alzheimer](https://nootropikler.com/fr/news/alzheimer-cerebellar-rtms-fnirs-rct): Dans un essai randomisé de 33 personnes, deux semaines de rTMS cérébelleuse ont été suivies d’une meilleure cognition globale que la stimulation simulée, jusqu’à la semaine 12. Les changements à la fNIRS étaient hémodynamiques, et non des mesures directes de l’activité neuronale. - [Deux zones pariétales de la souris ont montré des rôles distincts dans les tâches visuelles et de choix](https://nootropikler.com/fr/news/mouse-parietal-cortex-functional-architecture): L’imagerie de milliers de neurones chez la souris a montré que les zones pariétales médianes AM et A traitaient différemment les informations visuelles et de choix, ainsi que l’historique des choix et la posture. L’étude décrit leur organisation fonctionnelle sans établir qu’elles causent seules les comportements. - [Chez la souris, le sémaglutide administré à un âge avancé améliore des mesures de mémoire ; ses effets chez l’humain restent inconnus](https://nootropikler.com/fr/news/nih-semaglutide-late-life-mice-cognition): Une étude sur des souris rapportée par les NIH a constaté qu’une administration tardive de sémaglutide améliorait les mesures de mémoire spatiale ; sa pertinence clinique chez l’humain n’est pas établie. - [Les biomarqueurs d’Alzheimer ont identifié un sous-groupe de Parkinson avec un déclin plus rapide](https://nootropikler.com/fr/news/parkinsons-alzheimer-biomarker-cognitive-profiles): Dans une cohorte prospective, 42 des 449 participants atteints de Parkinson positifs aux biomarqueurs ont satisfait aux critères des biomarqueurs de la maladie d'Alzheimer et ont ensuite montré un déclin cognitif et moteur plus important. Le résultat observationnel est pronostique, non causal. - [La concentration en glutamate a modifié les états de signalisation des récepteurs AMPA aux synapses de souris](https://nootropikler.com/fr/news/glutamate-levels-tune-ampa-receptor-conductance): Des expériences sur les synapses des interneurones de souris ont révélé qu’une exposition plus faible au glutamate modifiait les propriétés des récepteurs AMPA par l’occupation de différents états de conductance. - [Une étude cartographie plusieurs règnes microbiens intestinaux chez des personnes souffrant de dépression majeure](https://nootropikler.com/fr/news/multi-kingdom-gut-microbiome-depression-cognition): Une étude portant sur 121 jeunes adultes atteints de dépression à premier épisode et 117 témoins a révélé des différences dans les signaux bactériens, viraux, fongiques et archéens. Son design transversal ne peut pas établir que les changements du microbiome causent la dépression ou des différences cognitives. - [Un modèle d’IA reconstruit des signaux cérébraux profonds à partir d’enregistrements corticaux pour la recherche sur la stimulation cérébrale profonde (SCP)](https://nootropikler.com/fr/news/deep-learning-subcortical-signal-reconstruction-dbs): Une analyse multicentrique des enregistrements de personnes atteintes de troubles du mouvement a testé si un modèle génératif pouvait inférer l'activité sous-corticale à partir des signaux corticaux afin d'aider à combler les lacunes des données de stimulation en boucle fermée. - [Une méthode d'imagerie cérébrale a cartographié comment le flux des signaux corticaux change selon l'état mental](https://nootropikler.com/fr/news/human-cortical-signal-flow-hierarchy-changes-with-state): Un cadre de connectivité efficace validé a inféré une hiérarchie corticale humaine qui s'aplatissait pendant le traitement centré sur l'extérieur et s'accentuait pendant les états centrés sur l'intérieur. - [Les essais d'alimentation pendant la grossesse rapportent des différences dans les structures cérébrales fœtales](https://nootropikler.com/fr/news/mikhuna-prenatal-diet-fetal-brain-growth): Dans un essai randomisé équatorien portant sur 215 grossesses, un programme de diversité alimentaire était associé à des différences de croissance dans plusieurs structures cérébrales fœtales ; l'étude a mesuré l'anatomie, pas la cognition ultérieure. - [Un essai de probiotiques chez des personnes présentant un trouble cognitif léger précoce évalue la cognition et les marqueurs tau](https://nootropikler.com/fr/news/multistrain-probiotics-early-cognitive-impairment): Un essai randomisé de 24 semaines portant sur 87 personnes présentant des troubles cognitifs précoces a révélé des niveaux plus faibles de pTau181 et des signaux visuo-spatiaux sélectifs, mais aucune différence dans le score MMSE, la mémoire verbale ou les fonctions exécutives. - [Comment un souvenir rappelé laisse une trace dans l'activité cérébrale ultérieure](https://nootropikler.com/fr/news/recalling-a-memory-leaves-a-trace-in-brain-activity): Dans une expérience d'IRMf, les invites de récupération ont influencé les schémas neuronaux ultérieurs pour les paires image-mot apprises, même si les participants ont obtenu des performances similaires lors du test de mémoire. - [Les rythmes thêta peuvent marquer les souvenirs pour la consolidation pendant le sommeil](https://nootropikler.com/fr/news/theta-rhythms-may-mark-memories-for-sleep-consolidation): Chez 31 jeunes adultes, l'EEG lors de l'apprentissage mot-sujet a lié une activité thêta plus forte à un couplage ultérieur des ondes du sommeil et à la rétention de mémoire après une sieste ; l'association n'établit pas la causalité. - [La FDA met en garde contre l’utilisation de glutathion destiné aux compléments alimentaires dans des préparations injectables](https://nootropikler.com/fr/news/fda-glutathione-injection-quality-alert): La FDA a signalé des événements indésirables chez au moins 30 patients après des injections intraveineuses de glutathion préparé en pharmacie et déconseille l’emploi de matières premières destinées aux compléments alimentaires pour les injections. - [Le rapport des NIH décrit les différences de repliement de l’ADN dans le vieillissement et la maladie d’Alzheimer](https://nootropikler.com/fr/news/nih-dna-organization-alzheimers-aging): Un rapport d’août des NIH a souligné des contacts ADN et une activité génique modifiés dans des cellules préfrontales post-mortem de donneurs atteints d’Alzheimer ; l’étude n’établit pas de causalité. - [La stimulation spinale ajoutée à l'entraînement sur tapis roulant a eu des effets limités sur la marche dans la maladie de Parkinson](https://nootropikler.com/fr/news/parkinson-spinal-magnetic-stimulation-treadmill-trial): Un essai randomisé de 70 personnes sur la maladie de Parkinson a trouvé des signaux à court terme de vitesse de marche et, plus tard, de gel de la marche avec stimulation plus entraînement sur tapis roulant, mais aucun avantage global soutenu. - [La glutamine n'a pas changé l'humeur ni les capacités cognitives lors d'une brève exposition simulée à haute altitude](https://nootropikler.com/fr/news/glutamine-hypoxia-cognition-rct): Dans un essai randomisé chez de jeunes hommes, six heures d'hypoxie simulée à 4 500 m n'ont pas modifié les mesures psychobiologiques, et la supplémentation en glutamine n'a pas produit de bénéfice détectable. - [Une étude sur les cacahuètes ne trouve aucun avantage significatif sur la cognition ou l'activation cérébrale](https://nootropikler.com/fr/news/peanut-consumption-memory-complaints-rct): Chez 27 personnes âgées présentant des troubles de mémoire, un essai de 12 semaines sur le beurre de cacahuète n’a trouvé aucune différence significative entre les groupes pour la cognition, l’activité cérébrale ou les biomarqueurs après ajustement. - [Les neurones sensibles à l'éveil ont aidé à réguler le besoin de sommeil chez les souris](https://nootropikler.com/fr/news/wake-history-neurons-regulate-sleep-drive-in-mice): La manipulation des neurones réactifs à l'éveil chez la souris a modifié le sommeil NREM et la pression du sommeil, identifiant des circuits candidats pour la régulation du sommeil sans montrer que la réduction du sommeil est sûre. - [Les organoïdes cérébraux à longue durée de vie présentent des caractéristiques du développement humain ultérieur](https://nootropikler.com/fr/news/nih-brain-organoids-long-term-maturation): Le NIH a rapporté que les organoïdes cérébraux dérivés de cellules souches ont mûri pendant près de six ans, l'âge moléculaire suivant le temps écoulé ; ce sont des modèles de laboratoire. - [Le cerveau des souris réutilise des éléments neuronaux dans plusieurs opérations cognitives](https://nootropikler.com/fr/news/reusable-modular-cognition-mouse-brain): Lors d’une tâche de correspondance différée, les souris ont réutilisé des sous-espaces neuronaux préfrontaux et pariétaux pour traiter les stimuli et maintenir des souvenirs. Des modèles de réseau ajustés aux données étayent une organisation modulaire, sans prouver l’existence de modules cognitifs humains. - [Un régime méditerranéen modifie des marqueurs métaboliques : résultats intermédiaires chez des personnes ayant un trouble cognitif léger](https://nootropikler.com/fr/news/mediterranean-diet-metabolomics-mci-interim): Chez 47 adultes âgés présentant un trouble cognitif léger, une intervention de 24 semaines fondée sur le régime méditerranéen a modifié plusieurs métabolites plasmatiques ; certaines variations étaient corrélées aux scores cognitifs. Une corrélation ne démontre pas de bénéfice cognitif. - [La FDA met à jour une alerte d'importation existante sur le kratom avec l'entrée d'un fournisseur en août](https://nootropikler.com/fr/news/fda-adds-kratom-supplements-to-import-detention-alert): La version du 17 août de l'Alerte d'importation 54-15 de la FDA inclut un nouveau fournisseur répertorié ; son mécanisme de détention du kratom date d'avant 2026 et s'applique aux importations spécifiées. - [Un essai sur un régime méditerranéen riche en protéines rapporte des différences modestes de scores cognitifs](https://nootropikler.com/fr/news/promed-protein-mediterranean-exercise-cognition): Un essai de six mois auprès de 105 adultes âgés à risque de dénutrition et de déclin cognitif a observé une amélioration de l’état nutritionnel et de faibles différences aux tests neurocognitifs dans les groupes ayant reçu des conseils alimentaires, par rapport au groupe témoin recevant une brochure. - [Une étude sur le pain riche en fibres prébiotiques se concentre sur la faisabilité et la cognition chez les personnes âgées](https://nootropikler.com/fr/news/prebiotic-fibre-bread-older-adults-feasibility): Un essai de faisabilité a testé, chez des adultes âgés consommant habituellement peu de fibres, un pain apportant 10 g/jour supplémentaires de fibres prébiotiques. L’étude visait à évaluer la faisabilité et les résultats préliminaires. - [Les traces de mémoire ont persisté grâce à l'hibernation artificielle chez les souris](https://nootropikler.com/fr/news/memory-traces-persist-after-artificial-hibernation-in-mice): Après une hibernation induite chez la souris, certaines mémoires ont persisté malgré la perte de plus de la moitié des synapses hippocampiques ; les connexions liées à la mémoire regroupées ont été préférentiellement conservées. - [Un petit essai associe les plasmalogènes issus de pétoncles à de meilleurs scores de mémoire verbale](https://nootropikler.com/fr/news/scallop-plasmalogens-verbal-memory-rct): Un essai de 12 semaines sur 68 adultes japonais sélectionnés a rapporté un petit signal de mémoire verbale pour les plasmalogènes dérivés de pétoncles ; les effets à plus long terme restent inconnus. - [TIMP2 a modifié les états microgliaux liés à l'âge chez les souris](https://nootropikler.com/fr/news/timp2-microglia-aging-mouse-brain): La suppression de TIMP2 a aggravé plusieurs mesures microgliales associées à l'âge chez la souris, tandis que le traitement chez des souris âgées a modifié les profils inflammatoires et la phagocytose. Ces résultats précliniques ne montrent pas de bénéfice cognitif ni n'établissent une intervention sûre pour l'homme. - [L’Université du Wisconsin met en avant un métabolite intestinal associé à des changements liés à Alzheimer](https://nootropikler.com/fr/news/gut-imidazole-propionate-alzheimer-announcement): Une annonce de l'Université du Wisconsin a décrit un métabolite bactérien intestinal associé à la cognition chez les individus et à des changements semblables à ceux de la maladie d'Alzheimer dans des modèles expérimentaux ; l'article lui-même a été publié le 26 juin. - [Un essai de créatine de douze semaines rapporte des marqueurs cognitifs exploratoires ainsi que des changements de force](https://nootropikler.com/fr/news/creatine-cognition-middle-aged-older-adults-rct): Une étude de 12 semaines sur la créatine incluant 64 participants ayant terminé l'étude a décrit les résultats cognitifs comme exploratoires, tandis que la participation à l'exercice et au régime était auto-sélectionnée. - [La plasticité endocannabinoïde a contribué à un apprentissage en un seul essai chez la souris](https://nootropikler.com/fr/news/striatal-endocannabinoids-one-shot-learning-mice): Chez la souris, un bref contact avec du ruban adhésif a ensuite entraîné un évitement et une plasticité corticostriatale ; perturber la voie endocannabinoïde a altéré l’apprentissage. Cette tâche d’aversion est un modèle animal, pas une preuve d’amélioration de la mémoire humaine. - [Un essai pilote de méditation et de respiration a réduit l'anxiété dans la maladie de Parkinson](https://nootropikler.com/fr/news/parkinson-meditation-breathwork-anxiety-pilot-trial): Dans un petit essai pilote randomisé, six semaines de méditation et de respiration à distance ont réduit l'anxiété liée à la maladie de Parkinson par rapport à un groupe en liste d'attente ; l'étude s'est concentrée sur l'anxiété, pas sur la cognition. - [Une étude sur le tissu cérébral humain relie le stockage altéré du glucose à la pathologie de la maladie d'Alzheimer](https://nootropikler.com/fr/news/brain-glucose-glycogen-alzheimer-human-brains): L’étude de 230 cerveaux post-mortem a associé des structures liées au glycogène à la pathologie tau d’Alzheimer, y compris à des stades précoces. L’analyse ne permet pas de déterminer quelles modifications sont apparues en premier ni si un changement alimentaire serait bénéfique. - [Un entraînement cognitif numérique a amélioré les scores exécutifs dans un petit essai sur le trouble du comportement en sommeil paradoxal](https://nootropikler.com/fr/news/cogtrail-rbd-cognitive-training-executive-function): Chez 82 personnes atteintes de trouble du comportement en sommeil REM isolé, un programme numérique de cinq semaines de formation cognitive et de conseils sur le mode de vie a été associé à des gains modestes de la fonction exécutive par rapport à un groupe en liste d'attente. - [Un microscope holographique permet d’étudier la communication entre différentes régions cérébrales](https://nootropikler.com/fr/news/two-photon-holographic-mesoscope-neural-circuits): Un nouveau système à deux photons a stimulé des neurones ciblés chez la souris sur un champ de quelques millimètres tout en imageant les réponses en aval. Il permet d’étudier les circuits entre régions cérébrales, mais reste un outil spécialisé de recherche, sans application humaine actuelle. - [La rééducation après une thérapie instrumentée de la maladie de Parkinson est associée à un possible signal cognitif](https://nootropikler.com/fr/news/parkinson-device-aided-therapy-rehabilitation-cognition): Dans une étude randomisée ouverte portant sur 54 personnes débutant une thérapie par dispositif pour la maladie de Parkinson, la rééducation personnalisée a été associée à de meilleures performances cognitives après un an, une observation secondaire nécessitant confirmation. - [Un essai comparant des boissons à teneur égale en caféine ne trouve aucun bénéfice attentionnel supplémentaire pour la boisson énergisante](https://nootropikler.com/fr/news/caffeine-matched-energy-drink-attention-trial): Chez 116 adultes, après une seule séance de test, une boisson énergisante n’a pas fait mieux qu’une boisson contenant la même dose de caféine (200 mg) pour l’attention ou la mémoire. - [Les assemblages de mémoire chez le macaque différaient selon le temps écoulé depuis l'apprentissage](https://nootropikler.com/fr/news/macaque-experience-reorganizes-memory-traces): Chez des macaques, la réactivation pendant le sommeil de séquences apprises différait selon qu’elles étaient nouvelles, récentes ou anciennes. Les souvenirs plus anciens formaient des assemblages plus stables et interconnectés. Cette étude transversale ne suit pas l’évolution des cellules individuelles dans le temps. - [Des chercheurs décrivent des plaques mitochondriales dans des cerveaux de modèles murins d’Alzheimer](https://nootropikler.com/fr/news/mitochondrial-plaques-alzheimers-neuronal-processes): Chez des souris modèles d’Alzheimer et dans des tissus humains post-mortem, des accumulations mitochondriales dans les prolongements neuronaux coexistaient avec une clairance lysosomale altérée. Ce résultat décrit une pathologie et n’établit aucun traitement ni effet cognitif. - [Un essai de quatre semaines sur l’alimentation 16:8 n’a montré aucun effet cognitif supplémentaire](https://nootropikler.com/fr/news/time-restricted-eating-working-memory-women): Chez 43 femmes en bonne santé, la mémoire de travail et l’attention se sont améliorées au fil du temps dans les deux groupes, sans avantage cognitif significatif pour l’alimentation à restriction horaire 16:8 par rapport au régime habituel. - [Un petit essai pilote de GeNeurofil rapporte des changements cognitifs et biologiques dans un trouble cognitif léger](https://nootropikler.com/fr/news/geneurofil-mci-pilot-trial): Dans une étude pilote de six mois portant sur 54 personnes présentant un trouble cognitif léger à modéré, GeNeurofil a été associé à une amélioration des scores aux tests et à des marqueurs plasmatiques plus faibles; les auteurs appellent à des essais confirmatoires plus importants. - [Un petit essai teste l’association d’un régime cétogène riche en végétaux et du jeûne chez des patients atteints d’Alzheimer](https://nootropikler.com/fr/news/plant-rich-ketogenic-fasting-alzheimer-trial): Dans un essai de six mois avec évaluateurs en aveugle auprès de 60 personnes recevant les soins habituels pour Alzheimer, le score MMSE moyen a augmenté dans le groupe combinant les interventions et baissé chez les témoins. Le protocole ne permet pas de distinguer l’effet du régime de celui du jeûne. - [Une étude nutritionnelle guidée par l'IA rapporte des changements cognitifs chez des résidents sous-alimentés en établissement de soins](https://nootropikler.com/fr/news/ai-guided-nutrition-long-term-care-cognition): Une étude en plusieurs étapes menée auprès de 108 résidents en soins de longue durée a observé une amélioration des mesures nutritionnelles et cognitives, surtout chez les participants les plus dénutris, après un soutien alimentaire adapté. Le protocole ne permet pas d’attribuer ces changements à l’IA. - [Chez la souris, le rejeu des séquences motrices persistait sans l’hippocampe](https://nootropikler.com/fr/news/procedural-memory-replay-independent-hippocampus): Pendant le sommeil, des souris entraînées rejouaient des séquences d’activité du striatum dorsal liées à l’expérience procédurale, même après une lésion de l’hippocampe. Ce rejeu prédisait les progrès ultérieurs, mais il faut le perturber sélectivement pour établir son rôle causal. - [Une revue trouve des résultats cognitifs mitigés dans les essais de suppléments pour Alzheimer et le trouble cognitif léger](https://nootropikler.com/fr/news/supplements-mci-alzheimer-network-review-2026): Une revue en réseau de 29 essais a trouvé des résultats mitigés selon les tests cognitifs chez les personnes atteintes d’Alzheimer ou d’un trouble cognitif léger ; aucun supplément n’a amélioré significativement le score ADAS-Cog. - [Les cellules immunitaires de l’hippocampe humain évoluent à la mi-vie](https://nootropikler.com/fr/news/human-hippocampus-immune-cells-shift-in-midlife): Le tissu hippocampique post-mortem de 40 adultes âgés de 20 à 95 ans a montré un changement à la mi-vie dans les populations de cellules immunitaires, comprenant moins de microglies résidentes et davantage de cellules inflammatoires ressemblant à des cellules sanguines. - [Le rationnement historique du sucre est associé à la santé cérébrale et mentale plus tard dans la vie](https://nootropikler.com/fr/news/early-life-sugar-rationing-brain-aging): Une étude en quasi-expérimentation a comparé des adultes exposés au rationnement du sucre dans l'enfance avec des cohortes nées plus tard et a trouvé des associations avec le vieillissement cérébral et les résultats de santé ultérieurs ; le design historique ne peut pas prouver une causalité alimentaire. - [Une étude en ligne associe le COVID long à des scores plus faibles en mémoire de travail](https://nootropikler.com/fr/news/long-covid-linked-to-lower-working-memory-scores): Dans une étude en ligne transversale de 1 064 personnes, le COVID long déclaré était associé à des scores plus faibles à un bref test de mémoire de travail visuelle ; une tâche ne peut pas diagnostiquer un déficit large. - [La FDA clôt l'enquête sur une épidémie de Salmonella liée aux capsules de moringa MOGO](https://nootropikler.com/fr/news/fda-closes-moringa-salmonella-outbreak-investigation): La clôture du 17 juillet de la FDA a signalé 34 maladies et 11 hospitalisations liées à certains lots de capsules de moringa MOGO ; des stocks rappelés peuvent rester dans les foyers. - [Le rappel indicé et chronométré a accru les gains de mémoire lors de tests répétés](https://nootropikler.com/fr/news/cued-recall-format-increases-repeated-memory-retrieval): À travers quatre expériences, des indices limités à la lettre initiale ont produit des gains plus importants lors de rappels répétés que lors du rappel libre, mais cet avantage a disparu lorsque les participants pouvaient répondre dans n'importe quel ordre. - [Les dendrites hippocampiques traitent les signaux d'apprentissage par elles-mêmes](https://nootropikler.com/fr/news/hippocampal-dendrites-process-learning-signals): L'imagerie du voltage chez les souris en navigation a révélé que certains signaux dendritiques de l'hippocampe CA3 changeaient avant le corps cellulaire dans un nouvel environnement, soutenant le traitement dendritique local sans prouver un bénéfice pour la mémoire. - [Les niveaux de p-tau217 sanguins ont suivi le risque de déclin cognitif futur chez les personnes âgées](https://nootropikler.com/fr/news/blood-ptau217-predicts-risk-of-cognitive-impairment): Une analyse observationnelle regroupée de 2 684 adultes initialement indemnes a lié des taux sanguins plus élevés de p-tau217 à un risque ultérieur plus élevé de déficience cognitive ; les estimations à 10 ans pour le groupe le plus élevé étaient moins certaines. - [Les agences américaines ouvrent le processus de classification des produits concentrés en 7-OH](https://nootropikler.com/fr/news/dea-begins-7-oh-scheduling-process): La mise à jour du 13 juillet de la FDA décrivait une proposition de classement temporaire pour le 7-OH concentré et ses dérivés synthétiques, distinguant le processus d'un ordre définitif. - [L’essai LatAm-FINGERS évalue un programme multidomaine contre le risque de déclin cognitif](https://nootropikler.com/fr/news/latam-fingers-lifestyle-cognition-trial): Un large essai randomisé en Amérique latine a testé l'exercice, l'alimentation, l'entraînement cognitif et la prise en charge des facteurs de risque vasculaire chez des adultes âgés à risque ; l'intervention a produit un avantage modeste sur son critère cognitif principal. - [Ceperognastat n'a pas ralenti la progression clinique dans un essai sur la maladie d'Alzheimer](https://nootropikler.com/fr/news/ceperognastat-alzheimers-phase2-trial-no-clinical-benefit): Dans un essai de phase 2 portant sur 327 personnes, le ceperognastat n'a pas ralenti de manière significative la maladie d'Alzheimer symptomatique précoce sur 100 semaines ; la dose plus élevée a montré une progression modélisée plus rapide que le placebo. - [Des sons aléatoires pendant une sieste ont perturbé les ondes lentes et la mémoire](https://nootropikler.com/fr/news/random-sleep-audio-disrupted-slow-waves-and-recall): Lors d’une étude de sieste en deux séances menée auprès de 20 hommes en bonne santé, des sons aléatoires ont réduit le sommeil à ondes lentes et altéré le rappel associatif de figures, mais pas la mémoire verbale ni procédurale. L’article est paru le 25 juin et l’Université de Fribourg l’a annoncé le 9 juillet. - [Un modèle régional de l'âge cérébral a relié un marqueur de tau sanguin à la cognition](https://nootropikler.com/fr/news/regional-brain-age-pattern-links-tau-marker-and-cognition): Une analyse transversale de 71 adultes plus âgés a trouvé une association indirecte entre le p-tau217 et la cognition via un modèle d'âge cérébral par IRM ; les associations directes et totales n'étaient pas significatives. - [Le bruit pendant le sommeil a perturbé les signaux mnésiques hippocampiques chez les rats](https://nootropikler.com/fr/news/sleep-noise-interrupts-hippocampal-memory-consolidation-in-rats): Chez des rats endormis, de brefs sons synchronisés avec les ondulations rapides de l'hippocampe ont réduit l'activité des ondulations et perturbé la rétention dans une tâche de mémoire, tandis que les effets variaient selon la tâche. - [Deux marqueurs IRM étaient associés à la progression cognitive dans la SEP précoce](https://nootropikler.com/fr/news/multiple-sclerosis-mri-markers-cognitive-progression): Chez 87 personnes atteintes de sclérose en plaques récurrente-rémittente précoce, les marqueurs IRM au moment du diagnostic étaient associés à un déclin cognitif ultérieur, indépendamment des rechutes ou de l'activité IRM. - [La farine de maïs enrichie n'a pas amélioré les scores cognitifs dans un essai chez des adolescentes éthiopiennes](https://nootropikler.com/fr/news/vitamin-fortified-corn-flour-teen-cognition-ethiopia): Un essai de six mois portant sur 472 filles n'a trouvé aucun bénéfice cognitif significatif provenant de la farine de maïs fortifiée en folate et en B12 ; une différence dans un test de langue est apparue dans une analyse secondaire selon le statut de retard de croissance. - [Une consommation plus élevée d'aliments ultra-transformés liée à une attention plus faible dans une cohorte australienne](https://nootropikler.com/fr/news/ultra-processed-foods-attention-apoe4): Une analyse transversale de 2 192 adultes australiens a associé une plus grande part d'aliments ultra-transformés à un score d'attention légèrement inférieur, mais n'a trouvé aucun lien clair avec la mémoire et ne peut pas établir de causalité. - [La FDA cite les allégations sur la maladie d'Alzheimer et l'anxiété sur le site d'un vendeur de thé vert](https://nootropikler.com/fr/news/fda-warns-green-tea-seller-over-disease-treatment-claims): Une lettre de la FDA du 2 juillet a contesté les allégations d’un vendeur concernant Alzheimer, Parkinson et l’anxiété pour le thé vert ; l’action concerne le marketing et l’approbation des médicaments, pas un nouvel essai d’efficacité. - [Les cétones dérivées du TCM ont été étudiées comme carburant alternatif pour le cerveau pendant l'hypoglycémie](https://nootropikler.com/fr/news/mct-ketones-hypoglycemia-working-memory-t1d): Une petite étude humaine a associé quatre semaines de régime aux triglycérides à chaîne moyenne (TCM) à une meilleure précision de mémoire de travail pendant une hypoglycémie provoquée chez des personnes atteintes de diabète de type 1 ; le temps de réaction ne s’est pas amélioré. - [Dans une cohorte, des marqueurs sanguins d’Alzheimer à la mi-vie étaient associés aux scores cognitifs](https://nootropikler.com/fr/news/nih-midlife-alzheimer-biomarkers-cognition): Un rapport du NIH de juillet a mis en avant une étude de cohorte CARDIA reliant les marqueurs amyloïde et tau dans le sang aux différences cognitives à l’âge moyen ; les résultats sont observationnels. - [Les balayages thêta hippocampiques suivaient les objectifs mémorisés chez les rats](https://nootropikler.com/fr/news/goal-directed-hippocampal-theta-navigation): Chez des rats explorant une arène ouverte, les séquences thêta hippocampiques liées à l’apprentissage prédisaient les trajets vers des objectifs mémorisés et se coordonnaient avec l’activité préfrontale. Il s’agit d’un circuit de planification possible, sans preuve de causalité. ## Nootropik News — Português - [Mudanças de humor e pensamentos intrusivos estavam ligados à lembrança de ações pretendidas](https://nootropikler.com/pt/news/affective-changes-intrusive-thoughts-prospective-memory): Entre 120 adultos, 117 foram incluídos nas análises de memória prospetiva. Humor e controlo dos pensamentos intrusivos estavam associados ao desempenho; os resultados não provam causalidade nem tratamento para problemas de memória. - [Nature Neuroscience abre uma edição especial sobre neurotecnologia e interfaces cérebro-computador](https://nootropikler.com/pt/news/neurotechnology-special-issue-editorial-october-2026): Um editorial de 1º de outubro apresenta uma edição especial sobre como a neurotecnologia conecta pesquisa cerebral, dispositivos assistivos e questões sobre governança de dados; é uma visão editorial, não um novo experimento. - [Os padrões de conectividade cerebral diferiram entre a patologia do Alzheimer e o envelhecimento](https://nootropikler.com/pt/news/alzheimer-connectivity-gradients-aging-biofinder-adni): Análises de RM em BioFINDER-2 e ADNI vincularam a patologia de Alzheimer e a idade a diferentes gradientes de conectividade de todo o córtex. As descobertas da coorte descrevem associações e não estabelecem um teste diagnóstico ou mecanismo causal. - [Ensaio com pequena mistura de groselha encontra mudanças seletivas de atenção em adultos mais velhos](https://nootropikler.com/pt/news/blackcurrant-theanine-pine-bark-attention-crossover): Ensaio cruzado com 26 adultos mais velhos após períodos de quatro semanas com mistura de groselha-preta, L-teanina e extrato de casca de pinheiro ou placebo. Os falsos alarmes diminuíram; memória e fadiga não foram significativas após correção para comparações múltiplas. A mistura não permite isolar um ingrediente. - [Um modelo de aprendizado de máquina estimou o comprometimento cognitivo futuro na doença de Parkinson.](https://nootropikler.com/pt/news/parkinsons-tabpfn-cognitive-impairment-prediction): Um estudo retrospectivo relatou AUCs de 0,822 internamente e 0,742 em uma coorte externa para um modelo TabPFN. Os autores dizem que a validação prospectiva multicêntrica é necessária antes do uso clínico. - [As populações de neurônios do hipocampo humano carregavam informações sobre o significado das palavras](https://nootropikler.com/pt/news/human-hippocampus-distributed-semantic-code): Gravações durante a escuta de narrativas associaram padrões distribuídos de atividade hipocampal à semântica das palavras, inclusive após análises levarem em conta fonética e gramática. - [Ensaio curto com cardamomo preto relata melhorias em testes de atenção, com financiamento da indústria](https://nootropikler.com/pt/news/black-cardamom-extract-short-attention-trial): Um ensaio de 14 dias randomizou 96 adultos para receber extrato de cardamomo preto, cafeína, sua combinação ou placebo; 85 entraram na análise final. Os ganhos relatados nos testes precisam de replicação independente e não estabelecem benefícios cognitivos duradouros. - [Estudo em camundongos relaciona a via do indol bacteriano intestinal a lesões por AVC e à resposta imune.](https://nootropikler.com/pt/news/gut-microbiota-indole-stroke-severity-immune-response): Experimentos em camundongos descobriram que a sinalização bacteriana de indol influenciou a atividade imunológica e a lesão cerebral pós-AVC. Uma coorte de pacientes humanos com AVC mostrou uma associação entre a abundância da tnaA bacteriana e piores desfechos, mas o mecanismo permanece não comprovado em pessoas. - [Gravações cerebrais mapearam sinais compartilhados e distintos para a fala imaginada e falada](https://nootropikler.com/pt/news/imagined-speech-neural-architecture-ecog): Gravações de alta densidade durante cirurgias acordadas encontraram sinais de planejamento compartilhados e padrões sensório-motores distintos para sílabas imaginadas versus faladas, um resultado que pode orientar futuras interfaces de fala. - [Condições de máscara correspondentes ajudaram no reconhecimento em um de dois experimentos de memória facial](https://nootropikler.com/pt/news/masked-face-recognition-context-congruency): Dois experimentos usando imagens da vida real de baixa resolução encontraram um benefício de congruência quando rostos mascarados foram codificados no primeiro experimento, mas não no segundo. A precisão foi modesta no geral. - [A anestesia apresentou uma assinatura comum de dinâmica neural em seis espécies](https://nootropikler.com/pt/news/cross-species-neural-dynamics-under-anesthesia): Uma análise de registos cerebrais de várias espécies encontrou escalas temporais neurais locais mais curtas e menor sincronização entre regiões sob anestesia; a estimulação talâmica inverteu o padrão em macacos. - [Estimulador sem bateria alimentado por radiofrequência funcionou em camundongos em movimento livre](https://nootropikler.com/pt/news/wireless-rf-neurostimulation-freely-moving-mice): Um estudo com animais e dispositivos testou um estimulador transcraniano sem fios alimentado por ondas de radiofrequência; o dispositivo manteve a saída em diferentes pontos da gaiola e induziu movimentos circulares quando dirigido a uma região motora. - [O uso de televisão e computador mostrou associações opostas com a cognição em adultos mais velhos](https://nootropikler.com/pt/news/screen-time-types-and-cognition-older-adults): Em quatro coortes de envelhecimento, mais tempo a ver televisão associou-se a pontuações cognitivas mais baixas, enquanto o uso do computador se associou a pontuações mais altas. Os resultados de randomização mendeliana ofereceram evidências de apoio, mas dependentes de pressupostos. - [A incerteza no ambiente reduziu o esforço de planejamento em uma tarefa humana ](https://nootropikler.com/pt/news/environmental-stochasticity-reduces-human-planning-effort): Em três formas de incerteza ambiental, os participantes planejavam menos, respondiam mais rapidamente e usavam políticas de decisão mais simples que eram menos sensíveis aos valores das opções. - [O estudo não encontrou diferenças detectáveis de APOE ε4 na cognição entre jovens adultos saudáveis](https://nootropikler.com/pt/news/apoe4-young-adult-cognition-navigation-null): Entre 1.000 adultos saudáveis com idades entre 18–35 anos, portadores de ε3ε4 não diferiram detectavelmente dos portadores de ε3ε3 em navegação ou em várias tarefas cognitivas. O resultado se aplica a esta amostra e faixa etária. - [As camadas corticais mudaram de forma diferente enquanto os camundongos aprendiam uma tarefa de bigodes](https://nootropikler.com/pt/news/cortex-wide-laminar-dynamics-learning-mice): Imagens de campo amplo em 25 áreas corticais encontraram mudanças distintas, às vezes opostas, na atividade das camadas 2/3 e 5 à medida que camundongos machos aprendiam uma tarefa baseada em bigodes. O estudo mapeia dinâmicas relacionadas à aprendizagem, mas não isola todas as contribuições causais. - [Microbiota intestinal e ácido indol-3-láctico ligados à recuperação cognitiva em estudo de comprometimento vascular ](https://nootropikler.com/pt/news/gut-ila-axis-vascular-cognitive-impairment): Um estudo de coorte clínica e experiências com camundongos associaram o metabolismo microbiano do triptofano à cognição e à função glinfática. As observações clínicas foram exploratórias; as evidências de intervenção vieram dos camundongos. - [Via da amígdala ao estriado modulou comportamento repetitivo em camundongos](https://nootropikler.com/pt/news/amygdala-striatum-circuit-repetitive-behavior-mice): Um estudo com camundongos mapeou uma projeção direta da amígdala para o estriado dorsolateral que modulou a autolimpeza desencadeada por estímulos e se fortaleceu num modelo de autolimpeza compulsiva. Trata-se de um achado sobre circuitos neuronais em animais, não de evidência de uma causa ou tratamento em humanos. - [Pequenas biópsias de tecido cerebral em pessoas vivas ofereceram uma visão direta da patologia de Alzheimer](https://nootropikler.com/pt/news/alzheimer-pathology-living-brain-biopsy-proteomics): Em 18 pessoas submetidas à cirurgia de derivação por suspeita de hidrocefalia de pressão normal, os pesquisadores encontraram placas de amiloide em nove biópsias e mapearam a química das placas e a renovação da tau. A amostra cirúrgica selecionada limita a generalização. - [Atlas apoiado pelo NIH mapeia a atividade celular em doenças cerebrais](https://nootropikler.com/pt/news/nih-single-cell-atlas-brain-disorders): NIH anunciou mapas moleculares construídos a partir de mais de 6,3 milhões de núcleos celulares e 1.494 doadores, fornecendo um recurso de pesquisa para Alzheimer e distúrbios cerebrais relacionados. - [Macacos rhesus ajustaram a velocidade de decisão de maneiras ligadas à precisão](https://nootropikler.com/pt/news/macaques-metacognitive-control-decision-accuracy): Em uma tarefa de escolha dupla, os macacos rhesus foram mais precisos em respostas mais rápidas, mesmo após levar em conta a dificuldade. Um modelo de monitoramento poderia explicar o padrão, embora não comprove diretamente a confiança subjetiva. - [Análise de biomarcadores COSMOS não encontra efeito de dois anos de multivitamínico ou extrato de cacau](https://nootropikler.com/pt/news/cosmos-multivitamin-cocoa-neurodegeneration-biomarkers): Em um subestudo de ensaio randomizado com adultos mais velhos, nem um multivitamínico nem o extrato de cacau alteraram três biomarcadores sanguíneos ao longo de dois anos em comparação com o placebo. Esses resultados de biomarcadores não resolvem se os suplementos afetam a cognição por outros caminhos. - [As estimativas de atenção visual não eram claramente intercambiáveis entre duas tarefas](https://nootropikler.com/pt/news/visual-attention-estimates-depend-on-task): Trinta participantes completaram duas tarefas de atenção visual. As estimativas foram em média 58 Hz em uma e 49 Hz na outra, mas as análises não estabeleceram uma diferença clara nem igualdade. - [Estimulação direcionada ao estriado alterou escolhas sobre esforço mental em um estudo em humanos](https://nootropikler.com/pt/news/temporal-interference-stimulation-mental-effort): Em um pequeno experimento com adultos saudáveis, a estimulação por interferência temporal alterou como os participantes avaliavam recompensas e esforço cognitivo, junto com mudanças nos sinais estriatais e cingulados. - [Dieta MIND com refeições fornecidas melhorou pontuações cognitivas num pequeno ensaio em pessoas com comprometimento cognitivo leve](https://nootropikler.com/pt/news/mind-based-diet-mci-cluster-rct-korea): Em um ensaio coreano aberto de 12 semanas com 80 adultos com declínio cognitivo leve, ambos os grupos da dieta MIND com refeições fornecidas melhoraram as pontuações K-MMSE2 em comparação ao controle; o resumo não fornece tamanho de efeito. - [Pequena coorte humana liga exposição a poluentes, micróbios intestinais e medidas de atenção](https://nootropikler.com/pt/news/pah-gut-microbiome-attention-impulsivity-cohort): Em 34 adultos, a exposição a hidrocarbonetos aromáticos policíclicos, perfis do microbioma e agrupamentos neurocomportamentais variaram em conjunto. Nenhum gênero microbiano individual resistiu à correção como associado ao agrupamento comportamental, então os links candidatos permanecem exploratórios. - [Sinais recíprocos do córtex visual ajudaram áreas cerebrais de camundongos a coordenar as respostas](https://nootropikler.com/pt/news/reciprocal-visual-cortex-connections-consensus): Gravações em camundongos, perturbações optogenéticas e modelos de circuito indicaram que conexões recíprocas V1–LM prolongaram a atividade visual congruente enquanto resolviam sinais inconsistentes. A descoberta diz respeito a uma tarefa visual simples e interpretação baseada em modelos. - [Um programa combinado de prisma e jogo melhorou alguns escores cognitivos pós-AVC.](https://nootropikler.com/pt/news/mindlenses-poststroke-cognitive-rehabilitation-trial): Em um ensaio randomizado com 60 pessoas envolvendo AVC, um dispositivo de adaptação prismática e jogo de tablet melhorou a memória a partir de três meses e a linguagem nas avaliações pós-tratamento em comparação à reabilitação padrão. - [Fadiga diária e desempenho mais rápido do que o habitual antecederam menor capacidade de superar a fadiga](https://nootropikler.com/pt/news/fatigue-processing-speed-override-daily-life): Uma análise coordenada de seis estudos em contextos reais concluiu que tanto uma fadiga acima do habitual como uma velocidade de processamento mais rápida previam uma associação mais forte entre fadiga e desempenho horas depois, um indicador de menor capacidade de superar os efeitos da fadiga. - [A FDA amplia alerta de oleandro amarelo tóxico para produtos Niwali e Easy Forte](https://nootropikler.com/pt/news/fda-yellow-oleander-niwali-easy-forte-alert): A FDA acrescentou Niwali Tejocote Pieces, Niwali Tejocote Capsules e Easy Forte Natural Fiber a um alerta existente após a deteção de oleandro-amarelo tóxico. A agência recomenda interromper o uso e contactar um profissional de saúde. - [Astrócitos formaram sequências de atividade temporizadas durante a evocação de memória em camundongos](https://nootropikler.com/pt/news/hippocampal-astrocyte-sequences-memory-mice): Imagem em camundongos detectou sequências de cálcio de astrócitos CA1 comprimidas durante o condicionamento ao medo e seu reaparecimento no contexto condicionado. As gravações são correlacionais e não mostram que os astrócitos criam ou são necessários para a memória. - [Perfil de metabolitos sanguíneos associa adesão à dieta mediterrânica a medidas cognitivas selecionadas](https://nootropikler.com/pt/news/mediterranean-diet-metabolite-signature-cognition-cohorts): Um estudo com duas coortes identificou uma assinatura sanguínea de 23 metabolitos associada à adesão à dieta mediterrânica e a algumas medidas cognitivas. A capacidade de transferência para a segunda coorte foi fraca até à recalibração do modelo, e o estudo foi observacional. - [Alterações na memória de reconhecimento acompanharam a progressão em uma coorte de Alzheimer inicial](https://nootropikler.com/pt/news/alzheimer-recognition-memory-progression-cohort): Um estudo de 24 meses com 278 adultos mais velhos com comprometimento cognitivo leve amnésico descobriu que menor discriminabilidade de reconhecimento e declínio precoce previram a conversão para demência de Alzheimer após ajuste para outras medidas. - [Células cerebelares previram recompensas após estimulação neural em camundongos](https://nootropikler.com/pt/news/cerebellar-dopamine-reward-prediction-mice): Em ratos, as células granulares cerebelares previam recompensas adiadas a partir da estimulação de neurônios dopaminérgicos ou do feixe do prosencéfalo medial, enquanto as fibras trepadeiras respondiam posteriormente. Perturbações apoiaram um papel nesta tarefa, sem estabelecer efeitos sobre a cognição humana. - [Desvantagem social acompanhou memória autoavaliada persistentemente mais baixa em uma grande coorte](https://nootropikler.com/pt/news/social-disadvantage-subjective-memory-longitudinal-cohort): Ao longo de seis ondas de dados de 14.938 adultos chineses com 45 anos ou mais, desvantagem social acumulada estava associada a uma memória autoavaliada persistentemente mais baixa, que se correlacionava fracamente com a cognição objetiva. - [Algoritmos adaptativos de interface cérebro-computador remodelaram a aprendizagem neural em macacos](https://nootropikler.com/pt/news/assistive-algorithms-shape-bci-learning): Gravações longitudinais e um modelo de rede neural sugerem que decodificadores BCI adaptativos concentraram as informações da tarefa em menos sinais neurais durante a prática, ao contrário dos decodificadores fixos. - [Representações sobrepostas no hipocampo ventral acompanharam a recuperação rápida de memórias de medo em camundongos](https://nootropikler.com/pt/news/ventral-hippocampus-overlapping-fear-memory-codes): A imagem de cálcio em camundongos mostrou que a aprendizagem do medo tornou mais semelhantes as representações de contextos ameaçadores e neutros no CA1 ventral, onde a atividade relacionada à ameaça regressou rapidamente durante a evocação. - [Eficiência do sono, mais do que a duração, acompanhou pontuações executivas ao longo de dois anos](https://nootropikler.com/pt/news/sleep-efficiency-executive-function-repeated-cohort): Entre 233 adultos com 55 anos ou mais, maior eficiência do sono medida por dispositivos vestíveis foi associada a melhor função executiva, enquanto a duração do sono e a qualidade autoavaliada não apresentaram vínculo significativo com os domínios cognitivos. - [Um implante cerebral decodificou fala e gestos juntos em estudo sobre paralisia](https://nootropikler.com/pt/news/speech-gesture-paralysis-brain-computer-interface): Um estudo com três participantes usou um implante cortical para decodificar tentativas de fala e gestos, mostrando uma prova de conceito para uma comunicação mais natural por meio de uma interface cérebro-computador. - [A aprendizagem do medo alterou sinapses inibitórias em partes distintas dos neurónios CA1 de camundongos](https://nootropikler.com/pt/news/ca1-inhibitory-synapses-remodel-with-fear-learning): A imagiologia longitudinal mostrou que o condicionamento de medo com traço reorganizou sinapses inibitórias dendríticas, mas estabilizou as sinapses no segmento inicial do axónio dos neurónios piramidais do hipocampo. - [Revisão sintetiza evidências observacionais sobre colina alimentar e cognição](https://nootropikler.com/pt/news/dietary-choline-cognition-observational-evidence-review): Uma revisão sistemática e uma meta-análise de dose-resposta avaliaram estudos observacionais sobre colina dietética e desfechos cognitivos. As evidências dizem respeito às associações nos estudos existentes, não se os suplementos de colina previnem o declínio. - [Insegurança alimentar e estresse estiveram associados a diferenças em tarefas cognitivas em estudantes universitários](https://nootropikler.com/pt/news/food-insecurity-stress-college-student-cognition): Um estudo transversal com 230 estudantes universitários relacionou insegurança alimentar e estresse com diferenças em tarefas de atenção, tomada de decisão e memória de correspondência. Essas associações não podem estabelecer que o acesso à comida causou os resultados. - [Meta-análise encontra sinais cognitivos modestos de dietas cetogênicas, com compensações lipídicas](https://nootropikler.com/pt/news/ketogenic-diet-cognitive-impairment-meta-analysis): Uma revisão de 12 estudos encontrou sinais cognitivos agrupados em adultos mais velhos com comprometimento, juntamente com colesterol total e LDL-C mais altos. - [Estudos de exercício apontam para padrões distintos de ativação cerebral para memória de trabalho](https://nootropikler.com/pt/news/exercise-working-memory-fmri-meta-analysis): Uma meta-análise de probabilidade de ativação de 11 estudos de fMRI encontrou alterações de ativação parcialmente diferentes após intervenções de exercício e em praticantes de longo prazo. A pequena base de evidências torna os mapas exploratórios. - [Estimulação junto ao nervo mostrou potencial como medida de EEG num pequeno estudo sobre consciência](https://nootropikler.com/pt/news/near-nerve-stimulation-consciousness-assessment): Um estudo piloto de centro único comparou estimulação nervosa com estimulação da pele em 19 pessoas com distúrbios prolongados de consciência; os autores pedem validação externa da medida baseada em EEG. - [Estudo pós-COVID relata associações entre microrganismos intestinais e medidas de neuroimagem](https://nootropikler.com/pt/news/post-covid-gut-microbiome-brain-imaging-associations): Um pequeno estudo transversal associou padrões de microrganismos intestinais com sintomas e medidas de ressonância magnética na condição pós-COVID. Isso não mostra que o microbioma causou alterações cerebrais ou sintomas. - [A solidão persistente foi associada a pior saúde em uma coorte de idosos](https://nootropikler.com/pt/news/loneliness-isolation-trajectories-older-adult-health): Uma análise longitudinal de 4.090 adultos ingleses vinculou a solidão crônica a pior saúde física e mental. Encerrar o isolamento foi associado a melhor cognição, mas dados observacionais não podem estabelecer causa e efeito. - [Tau frontal foi associado a ondas de sono interrompidas e memória mais fraca](https://nootropikler.com/pt/news/frontal-tau-linked-to-disrupted-sleep-waves-and-memory): Entre coortes de adultos mais velhos usando PET tau, EEG e marcadores de líquido cerebrospinal, maior tau frontal estava associado a ondas lentas do sono que se propagavam menos e pior memória durante a noite. - [Coorte de longo prazo separa a patologia de Alzheimer da resiliência cognitiva.](https://nootropikler.com/pt/news/alzheimer-pathology-cognitive-resilience-longitudinal-risk): Em 3.119 adultos mais velhos acompanhados por uma mediana de 13,7 anos, a patologia e uma medida derivada de resiliência cognitiva acompanharam de forma independente o risco de demência; a análise observacional não mostra causalidade. - [A sede durante o ciclismo em clima quente afetou as avaliações de concentração, mas não as pontuações dos testes de função executiva](https://nootropikler.com/pt/news/thirst-satiation-heat-exercise-executive-function): Em 12 homens, água e solução salina intravenosa produziram hidratação semelhante, mas a solução salina deixou os participantes com mais sede e maior estresse térmico; os escores do teste flanker e do humor não apresentaram diferenças. - [O aprendizado olfativo reorganizou representações neurais em zebrafish](https://nootropikler.com/pt/news/odor-learning-reorganizes-brain-representations-in-zebrafish): O treinamento de discriminação olfativa em zebrafish juvenis e adultos aumentou a separação dos padrões neurais relevantes para a tarefa em pDp, e essa geometria representacional acompanhou o desempenho individual. - [A interferência de características estava ligada a erros de decisão quando os sinais da tarefa eram incertos. ](https://nootropikler.com/pt/news/feature-interference-cost-of-task-uncertainty): Comportamento humano, gravações do V1 de macacos e modelagem associaram a incerteza sobre qual tarefa perceptual realizar a uma codificação mais forte de características irrelevantes e a representações neurais menos distintas. - [Neurônios inibitórios corticais raros promoveram atividade sincronizada e sono em camundongos](https://nootropikler.com/pt/news/cortical-sst-chodl-neurons-promote-sleep-mice): A ativação seletiva de neurônios inibitórios Sst-Chodl promoveu sincronia cortical e sono em camundongos. O artigo publicado em setembro amplia a pesquisa sobre circuitos neurais já disponível como preprint; não demonstra um tratamento do sono para humanos. - [Conceção de elétrodo submicrométrico autoportante para registos flexíveis da superfície cerebral](https://nootropikler.com/pt/news/submicron-ecog-electrode-array): Engenheiros relataram um fino arranjo de eletrocorticografia autossustentável inspirado na estrutura das asas de libélula, abordando uma troca de materiais relevante para futuras interfaces cérebro-computador. - [Processo mitocondrial ligado ao tau reduziu déficits em modelos animais](https://nootropikler.com/pt/news/nih-tau-mitochondria-reverse-electron-transport): O NIH destacou experimentos que ligam tau alterado ao transporte reverso de elétrons mitocondrial; bloquear essa via ajudou modelos, mas não pacientes em um ensaio clínico. - [O programa comunitário de reabilitação para Parkinson foi seguido por melhores resultados em testes cognitivos](https://nootropikler.com/pt/news/parkinsons-pd-core-cognitive-rehabilitation): Em um estudo pré-pós com 45 pessoas, um programa grupal de sete sessões foi seguido por ganhos em testes de cognição global e julgamento prático. Sem um grupo controle, o estudo não pode separar efeitos do tratamento de prática ou outras mudanças. - [Um perfil de saúde multidomínio acompanhou o envelhecimento cognitivo em três coortes.](https://nootropikler.com/pt/news/intrinsic-capacity-profile-cognitive-aging-three-cohorts): Entre 26.022 adultos de três coortes sobre envelhecimento, limitações em domínios não cognitivos da saúde associaram-se a pontuações cognitivas mais baixas e a um maior risco de comprometimento cognitivo posterior. - [Estudo relaciona cochilos mais longos com menor velocidade de processamento em adultos mais velhos](https://nootropikler.com/pt/news/pointer-zzz-napping-apnea-cognition): Uma análise inicial de 686 participantes idosos do POINTER nos EUA associou cochilos mais longos durante o dia a uma velocidade de processamento mais baixa; causalidade e interação com apneia não foram estabelecidas. - [A coorte UK Biobank associa a densidade de niacina na dieta com cognição e risco de demência](https://nootropikler.com/pt/news/niacin-diet-density-cognition-dementia-cohort): Um grande estudo de coorte populacional examinou equivalentes de niacina na dieta em relação à função cognitiva e à demência incidente; seu desenho observacional não pode mostrar que o aumento da niacina previne o declínio. - [Análise multi-ômica propõe candidatos a biomarcadores de Parkinson relacionados a estágios](https://nootropikler.com/pt/news/parkinsons-proteo-metabolomic-stage-biomarkers): Uma análise secundária dos dados da Iniciativa de Marcadores de Progressão da Doença de Parkinson combinou proteínas e metabólitos do LCR e plasma para identificar marcadores candidatos. As descobertas de aprendizado de máquina são exploratórias e precisam de validação clínica independente. - [Memórias distintas estavam ligadas a uma atenção visual mais precisa](https://nootropikler.com/pt/news/distinct-memories-help-focus-on-visual-targets): Em uma tarefa humana de fMRI e rastreamento ocular em busca visual, padrões de memória hipocampal mais distintos foram associados a movimentos oculares guiados pela memória mais precisos e menor ativação de competidores. - [SUPPLX recolhe dois produtos após identificação de ioimbina não declarada](https://nootropikler.com/pt/news/fda-recalls-products-undeclared-yohimbine): SUPPLX recolheu voluntariamente Business Pill e Branch Manager for Men após testes identificarem ioimbina não declarada; FDA publicou o aviso em 4 de setembro. - [Prática estruturada precoce moldou a aprendizagem flexível em camundongos.](https://nootropikler.com/pt/news/structured-practice-shaped-flexible-learning-in-mice): Em camundongos aprendendo uma tarefa de temporização, exemplos iniciais estruturados apoiaram estratégias posteriores mais flexíveis e atividade entorrinal relacionada à tarefa; o estudo também testou previsões de um modelo de rede neural. - [Inquérito europeu relaciona sono muito prolongado e sestas durante o dia com comprometimento cognitivo](https://nootropikler.com/pt/news/european-sleep-duration-cognition-share-analysis): Uma análise transversal de 88.889 entrevistas do SHARE associou dormir pelo menos 10 horas e fazer sestas durante o dia a um desempenho cognitivo inferior; não permite determinar se os padrões de sono causam comprometimento. - [Pequeno ensaio controlado por placebo em Alzheimer relata ganhos cognitivos após estimulação cerebelar](https://nootropikler.com/pt/news/alzheimer-cerebellar-rtms-fnirs-rct): Em um ensaio randomizado com 33 pessoas, duas semanas de rTMS cerebelar foram seguidas por melhor cognição global do que o sham até a semana 12. As mudanças no fNIRS eram medidas hemodinâmicas, não registros diretos da atividade neural. - [Semaglutida na velhice melhorou medidas de memória em camundongos; efeitos em humanos permanecem desconhecidos](https://nootropikler.com/pt/news/nih-semaglutide-late-life-mice-cognition): Um estudo com camundongos relatado pelo NIH concluiu que a semaglutida administrada em idade avançada melhorou medidas de memória espacial; a relevância clínica para as pessoas ainda não foi estabelecida. - [Biomarcadores de Alzheimer marcaram um subgrupo de Parkinson com declínio mais rápido](https://nootropikler.com/pt/news/parkinsons-alzheimer-biomarker-cognitive-profiles): Em uma coorte prospectiva, 42 de 449 participantes com biomarcadores positivos para Parkinson atenderam aos critérios de biomarcadores de Alzheimer e posteriormente exibiram maior declínio cognitivo e motor. O resultado observacional é prognóstico, não causal. - [Duas áreas parietais de camundongos mostraram papéis distintos em tarefas visuais e de escolha](https://nootropikler.com/pt/news/mouse-parietal-cortex-functional-architecture): A imagem mesoscópica de milhares de neurônios de camundongos encontrou que as áreas parietais mediais AM e A representavam informações visuais/de escolha e histórico de escolhas/postura de forma diferente. O estudo mapeia a organização funcional; não estabelece que essas áreas sozinhas causam os comportamentos. - [A concentração de glutamato alterou os estados de sinalização dos receptores AMPA em sinapses de camundongos](https://nootropikler.com/pt/news/glutamate-levels-tune-ampa-receptor-conductance): Experimentos com sinapses de interneurônios de camundongos descobriram que a menor exposição ao glutamato alterou as propriedades dos receptores AMPA por meio da ocupação de diferentes estados de condutância. - [Estudo mapeia múltiplos reinos de microrganismos intestinais na depressão maior e cognição](https://nootropikler.com/pt/news/multi-kingdom-gut-microbiome-depression-cognition): Um estudo com 121 jovens adultos com depressão de primeira ocorrência e 117 controles encontrou diferenças nos sinais bacterianos, virais, fúngicos e arqueanos. Seu desenho transversal não pode estabelecer que mudanças no microbioma causam depressão ou diferenças cognitivas. - [Um método de imagem cerebral mapeou como o fluxo de sinais corticais muda com o estado mental.](https://nootropikler.com/pt/news/human-cortical-signal-flow-hierarchy-changes-with-state): Uma estrutura validada de conectividade efetiva inferiu uma hierarquia cortical humana que se achatou durante o processamento focado externamente e se acentuou durante estados focados internamente. - [Modelo de IA reconstruiu sinais de cérebro profundo a partir de registros corticais para pesquisa de DBS](https://nootropikler.com/pt/news/deep-learning-subcortical-signal-reconstruction-dbs): Uma análise multicêntrica de gravações de pessoas com distúrbios de movimento testou se um modelo generativo poderia inferir a atividade subcortical a partir de sinais corticais para ajudar a preencher lacunas nos dados de estimulação em circuito fechado. - [Relatórios de ensaios de apoio alimentar durante a gravidez mostram diferenças nas estruturas cerebrais fetais](https://nootropikler.com/pt/news/mikhuna-prenatal-diet-fetal-brain-growth): Em um ensaio randomizado no Equador com 215 gestações, um programa de diversidade alimentar foi associado a diferenças de crescimento em várias estruturas cerebrais fetais; o estudo mediu anatomia, não cognição posterior. - [Ensaio de probióticos em comprometimento cognitivo inicial examina cognição e marcadores tau](https://nootropikler.com/pt/news/multistrain-probiotics-early-cognitive-impairment): Um ensaio randomizado de 24 semanas com 87 pessoas com comprometimento cognitivo precoce encontrou níveis mais baixos de pTau181 e sinais visuo-espaciais seletivos, mas nenhuma diferença no MMSE, memória verbal ou pontuação executiva. - [Ritmos theta podem marcar memórias para consolidação durante o sono](https://nootropikler.com/pt/news/theta-rhythms-may-mark-memories-for-sleep-consolidation): Em 31 adultos jovens, EEG durante o aprendizado de palavras–objetos relacionou atividade teta mais forte com posterior acoplamento de ondas do sono e retenção de memória após uma soneca; a associação não estabelece causalidade. - [A forma de evocar uma memória deixou um rasto na atividade cerebral posterior](https://nootropikler.com/pt/news/recalling-a-memory-leaves-a-trace-in-brain-activity): Num experimento de fMRI, as instruções de evocação moldaram padrões neurais posteriores para pares de imagem e palavra aprendidos, embora os participantes tivessem desempenho semelhante no teste de memória. - [FDA alerta contra o uso de glutationa destinada a suplementos em preparações injetáveis manipuladas](https://nootropikler.com/pt/news/fda-glutathione-injection-quality-alert): A FDA relatou eventos adversos em pelo menos 30 pacientes após o uso de glutationa IV manipulada e alertou contra o uso de material de qualidade suplementar para injeções. - [O relatório do NIH descreve diferenças no dobramento do DNA no envelhecimento e na doença de Alzheimer.](https://nootropikler.com/pt/news/nih-dna-organization-alzheimers-aging): Um relatório do NIH de agosto destacou alterações nos contatos de DNA e na atividade gênica em células do córtex pré-frontal de doadores com Alzheimer; o estudo não estabelece causalidade. - [Estimulação da coluna adicionada ao treino na esteira teve efeitos limitados na marcha em Parkinson.](https://nootropikler.com/pt/news/parkinson-spinal-magnetic-stimulation-treadmill-trial): Um ensaio randomizado de Parkinson com 70 pessoas encontrou sinais de aumento da velocidade de caminhada a curto prazo e posteriormente de congelamento de marcha com estimulação mais treinamento em esteira, mas sem vantagem geral sustentada. - [A glutamina não mudou o humor ou a cognição durante a breve exposição simulada a alta altitude](https://nootropikler.com/pt/news/glutamine-hypoxia-cognition-rct): Em um ensaio randomizado com homens jovens, seis horas de hipóxia simulada a 4.500 m não alteraram medidas psicobiológicas, e a suplementação de glutamina não produziu benefício detectável. - [O estudo com amendoim não encontra benefício significativo cognitivo ou de ativação cerebral](https://nootropikler.com/pt/news/peanut-consumption-memory-complaints-rct): Um ensaio de amendoim de 12 semanas em 27 adultos mais velhos com queixas de memória não encontrou diferenças significativas entre os grupos em cognição, ativação cerebral ou biomarcadores ajustados. - [Neurônios responsivos à vigília ajudaram a regular o impulso do sono em camundongos](https://nootropikler.com/pt/news/wake-history-neurons-regulate-sleep-drive-in-mice): Manipular neurônios responsivos à vigília em camundongos alterou o sono NREM e a pressão do sono, identificando circuitos candidatos para a regulação do sono sem mostrar que a redução do sono é segura. - [Organoides cerebrais de longa duração mostram características do desenvolvimento humano tardio](https://nootropikler.com/pt/news/nih-brain-organoids-long-term-maturation): O NIH relatou que organoides cerebrais derivados de células-tronco amadureceram ao longo de quase seis anos, com a idade molecular acompanhando o tempo decorrido; estes são modelos laboratoriais. - [O cérebro de camundongos reutilizou componentes neurais em várias operações cognitivas](https://nootropikler.com/pt/news/reusable-modular-cognition-mouse-brain): Numa tarefa de correspondência retardada, camundongos reutilizaram subespaços neurais pré-frontais e parietais no processamento de estímulos e manutenção da memória. Modelos de rede limitados pelos dados apoiaram uma explicação modular, mas o resultado é específico a uma tarefa e não prova módulos cognitivos humanos. - [A dieta mediterrânea altera marcadores metabólicos em uma análise intermediária de MCI](https://nootropikler.com/pt/news/mediterranean-diet-metabolomics-mci-interim): Em 47 adultos mais velhos com comprometimento cognitivo leve, uma intervenção de dieta mediterrânea de 24 semanas alterou vários metabolitos plasmáticos; algumas mudanças nos metabolitos se correlacionaram com os escores cognitivos. Correlação não estabelece benefício cognitivo. - [FDA atualiza um alerta de importação existente de kratom com uma entrada de fornecedor em agosto](https://nootropikler.com/pt/news/fda-adds-kratom-supplements-to-import-detention-alert): A versão de 17 de agosto do FDA Import Alert 54-15 inclui um novo fornecedor listado; seu mecanismo de detenção do kratom é anterior a 2026 e se aplica a determinadas importações. - [Estudo com dieta mediterrânea rica em proteínas relata diferenças modestas nas pontuações cognitivas](https://nootropikler.com/pt/news/promed-protein-mediterranean-exercise-cognition): Um ensaio de seis meses com 105 adultos mais velhos em risco de desnutrição e declínio cognitivo encontrou melhora no estado nutricional e pequenas diferenças nos escores neurocognitivos nos grupos com aconselhamento dietético em comparação com um grupo controle com folheto. - [Ensaio com pão enriquecido com fibra prebiótica avalia viabilidade e cognição em adultos mais velhos](https://nootropikler.com/pt/news/prebiotic-fibre-bread-older-adults-feasibility): Um ensaio de viabilidade testou pão que fornecia um extra de 10 g/dia de fibra prebiótica em idosos com baixa ingestão habitual de fibra; foi projetado para avaliar a viabilidade e resultados preliminares. - [Traços de memória persistiram durante a hibernação artificial em camundongos](https://nootropikler.com/pt/news/memory-traces-persist-after-artificial-hibernation-in-mice): Após a hibernação induzida em camundongos, memórias selecionadas persistiram apesar da perda de mais da metade das sinapses do hipocampo; conexões agrupadas ligadas à memória foram preferencialmente retidas. - [TIMP2 alterou estados microgliais relacionados à idade em camundongos](https://nootropikler.com/pt/news/timp2-microglia-aging-mouse-brain): A deleção de TIMP2 piorou várias medidas de microglia associadas à idade em camundongos, enquanto o tratamento em camundongos idosos alterou perfis inflamatórios e fagocitose. Esses achados pré-clínicos não mostram benefício cognitivo nem estabelecem uma intervenção segura em humanos. - [Pequeno ensaio associa plasmalogénios derivados de vieira a pontuações mais altas em memória verbal](https://nootropikler.com/pt/news/scallop-plasmalogens-verbal-memory-rct): Um ensaio de 12 semanas com 68 adultos japoneses selecionados relatou um pequeno sinal de memória verbal para plasmágenos derivados de vieira; os efeitos a longo prazo permanecem desconhecidos. - [Anúncio da UW destaca metabólito intestinal associado a alterações ligadas ao Alzheimer.](https://nootropikler.com/pt/news/gut-imidazole-propionate-alzheimer-announcement): Um anúncio da Universidade de Wisconsin descreveu um metabólito bacteriano intestinal associado à cognição em pessoas e alterações semelhantes ao Alzheimer em modelos experimentais; o artigo em si foi publicado em 26 de junho. - [Relatório de ensaio de creatina de doze semanas apresenta marcadores cognitivos exploratórios junto com mudanças de força](https://nootropikler.com/pt/news/creatine-cognition-middle-aged-older-adults-rct): Um estudo de creatina de 12 semanas em 64 participantes completos descreveu os achados cognitivos como exploratórios, enquanto a participação em exercícios e dieta foi auto-selecionada. - [Plasticidade endocanabinoide apoiou a aprendizagem após uma única exposição em camundongos](https://nootropikler.com/pt/news/striatal-endocannabinoids-one-shot-learning-mice): Um contacto breve com fita adesiva levou posteriormente à sua evitação pelos camundongos e à plasticidade corticostriatal; a interrupção da via endocanabinoide prejudicou a aprendizagem. Esta nova tarefa de aversão é um modelo animal, não uma evidência de melhoria da memória humana. - [Um estudo piloto de meditação e exercícios de respiração reduziu a ansiedade na doença de Parkinson](https://nootropikler.com/pt/news/parkinson-meditation-breathwork-anxiety-pilot-trial): Em um pequeno estudo piloto randomizado, seis semanas de meditação e exercícios respiratórios remotos reduziram a ansiedade relacionada ao Parkinson em comparação a um grupo de lista de espera; o estudo focou na ansiedade, não na cognição. - [Estudo com tecido cerebral humano relaciona armazenamento alterado de glicose com a patologia da doença de Alzheimer](https://nootropikler.com/pt/news/brain-glucose-glycogen-alzheimer-human-brains): Um estudo com 230 cérebros pós-morte vinculou estruturas relacionadas ao glicogênio com a patologia da tau da doença de Alzheimer, incluindo alterações observadas em estágios patológicos iniciais. A análise do tecido não pode determinar quais mudanças ocorreram primeiro ou se alterar a dieta seria benéfico. - [Treino cognitivo digital melhorou pontuações executivas num pequeno ensaio em pessoas com distúrbio comportamental do sono REM](https://nootropikler.com/pt/news/cogtrail-rbd-cognitive-training-executive-function): Em 82 pessoas com distúrbio comportamental do sono REM isolado, um programa de cinco semanas de treinamento cognitivo digital e orientação sobre estilo de vida esteve ligado a ganhos modestos de função executiva em comparação com um grupo de lista de espera. - [Um microscópio holográfico permitiu que os pesquisadores investigassem a comunicação entre áreas do cérebro.](https://nootropikler.com/pt/news/two-photon-holographic-mesoscope-neural-circuits): Um novo sistema de dois fotões estimulou neurónios selecionados de camundongos num campo à escala milimétrica, enquanto captava imagens das respostas a jusante. Permite experiências sobre circuitos em várias áreas; continua a ser uma ferramenta de investigação especializada, sem aplicação em humanos. - [A reabilitação após terapia avançada de Parkinson mostrou um possível sinal cognitivo](https://nootropikler.com/pt/news/parkinson-device-aided-therapy-rehabilitation-cognition): Em um estudo aberto randomizado com 54 pessoas que iniciaram a terapia assistida por dispositivo para Parkinson, a reabilitação personalizada esteve associada a um melhor desempenho cognitivo após um ano, um achado secundário que precisa de confirmação. - [Ensaio com controlo de cafeína não encontra benefício adicional de uma fórmula de bebida energética para a atenção](https://nootropikler.com/pt/news/caffeine-matched-energy-drink-attention-trial): Em 116 adultos, uma bebida energética não teve desempenho superior a uma bebida com 200 mg de cafeína no que diz respeito à atenção ou memória após uma sessão de teste aguda. - [Conjuntos de memória de macacos diferiam de acordo com o tempo desde a aprendizagem](https://nootropikler.com/pt/news/macaque-experience-reorganizes-memory-traces): Gravações em macacos descobriram que a reativação durante o sono diferia entre sequências aprendidas novas, recentes e mais antigas; memórias mais antigas formaram conjuntos mais estáveis e interconectados. O estudo transversal em primatas não pode acompanhar a mudança de células individuais ao longo do tempo. - [Pesquisadores descrevem placas mitocondriais em cérebros de modelo de Alzheimer. ](https://nootropikler.com/pt/news/mitochondrial-plaques-alzheimers-neuronal-processes): Em camundongos modelo de Alzheimer e em tecido humano pós-morte, pesquisadores identificaram acúmulos mitocondriais em processos neuronais junto com comprometimento da depuração lisossomal. O achado descreve a patologia; não estabelece efeito de tratamento ou cognitivo. - [Um ensaio de janela alimentar 16:8 de quatro semanas não encontrou efeito cognitivo adicional.](https://nootropikler.com/pt/news/time-restricted-eating-working-memory-women): Em 43 mulheres saudáveis, a memória de trabalho e a atenção melhoraram ao longo do tempo em ambos os grupos, sem vantagem cognitiva significativa para a dieta com restrição de tempo 16:8 em comparação à dieta usual. - [Pequeno piloto GeNeurofil relata mudanças cognitivas e de biomarcadores em MCI](https://nootropikler.com/pt/news/geneurofil-mci-pilot-trial): Em um piloto de seis meses com 54 pessoas com comprometimento cognitivo leve a moderado, o GeNeurofil foi associado a melhora nos resultados dos testes e redução dos marcadores plasmáticos; os autores pedem ensaios confirmatórios maiores. - [Pequeno ensaio de Alzheimer testa dieta cetogênica rica em plantas combinada com jejum](https://nootropikler.com/pt/news/plant-rich-ketogenic-fasting-alzheimer-trial): Em um ensaio de seis meses com avaliador cego envolvendo 60 pessoas recebendo cuidados padrão para Alzheimer, o grupo de intervenção combinada teve um aumento médio no MMSE enquanto os escores do grupo controle diminuíram. O desenho do estudo não consegue separar dieta de jejum. - [Estudo de nutrição orientado por IA relata alterações cognitivas em residentes subnutridos de instituições de cuidados de longa duração](https://nootropikler.com/pt/news/ai-guided-nutrition-long-term-care-cognition): Um estudo em etapas com 108 residentes de cuidados de longo prazo descobriu que medidas nutricionais e cognitivas melhoraram principalmente no grupo mais desnutrido após suporte alimentar personalizado. O desenho do estudo não pode mostrar que a IA em si causou as mudanças. - [Revisão de suplementos encontra resultados cognitivos mistos em ensaios sobre Alzheimer e comprometimento cognitivo leve](https://nootropikler.com/pt/news/supplements-mci-alzheimer-network-review-2026): Uma revisão de 29 ensaios encontrou sinais mistos nos testes cognitivos em doença de Alzheimer e comprometimento cognitivo leve; nenhum suplemento melhorou significativamente o ADAS-Cog. - [Reativação de padrões de habilidade em camundongos persistiu sem o hipocampo](https://nootropikler.com/pt/news/procedural-memory-replay-independent-hippocampus): Durante o sono, camundongos treinados repetiram sequências de atividade do estriado dorsal ligadas à experiência procedural mesmo após lesões hipocampais. A repetição previu ganhos posteriores na tarefa, mas ainda é necessário interromper seletivamente a repetição para estabelecer seu papel causal. - [Células imunes do hipocampo humano mudam durante a meia-idade](https://nootropikler.com/pt/news/human-hippocampus-immune-cells-shift-in-midlife): Tecidos hipocampais post-morte de 40 adultos com idades entre 20 e 95 anos mostraram uma mudança nas populações de células imunes na meia-idade, incluindo menos micróglias residentes e mais células inflamatórias semelhantes a células sanguíneas. - [Estudos online ligam a COVID long à menores pontuações de memória de trabalho.](https://nootropikler.com/pt/news/long-covid-linked-to-lower-working-memory-scores): Em um estudo online transversal com 1.064 pessoas, o relato de COVID prolongado foi associado a pontuações mais baixas em um breve teste de memória de trabalho visual; uma tarefa não pode diagnosticar um comprometimento amplo. - [Racionamento histórico de açúcar ligado a resultados cerebrais e de saúde mental na vida adulta](https://nootropikler.com/pt/news/early-life-sugar-rationing-brain-aging): Um estudo de experimento natural comparou adultos expostos à ração de açúcar na infância com coortes nascidas posteriormente e encontrou associações com envelhecimento cerebral mais tardio e desfechos de saúde; o desenho histórico não pode provar causalidade dietética. - [FDA encerra investigação de surto de Salmonella relacionado às cápsulas de moringa MOGO](https://nootropikler.com/pt/news/fda-closes-moringa-salmonella-outbreak-investigation): O relatório de encerramento da FDA de 17 de julho registrou 34 doenças e 11 hospitalizações ligadas a determinados lotes de cápsulas de moringa MOGO; estoques recolhidos podem permanecer em residências. - [Os dendritos hipocampais processam sinais de aprendizado por conta própria](https://nootropikler.com/pt/news/hippocampal-dendrites-process-learning-signals): A imagem de voltagem em camundongos navegando encontrou que alguns sinais dendríticos do CA3 hipocampal mudaram antes do corpo celular em um ambiente novo, apoiando o processamento dendrítico local sem provar benefício de memória. - [A lembrança com pistas cronometrada aumentou os ganhos de memória em testes repetidos. ](https://nootropikler.com/pt/news/cued-recall-format-increases-repeated-memory-retrieval): Ao longo de quatro experimentos, pistas restritas à letra inicial produziram ganhos maiores na recordação repetida do que na recordação livre, mas a vantagem desapareceu quando os participantes puderam responder em qualquer ordem. - [Níveis sanguíneos de p-tau217 acompanharam o risco de comprometimento cognitivo posterior em adultos mais velhos](https://nootropikler.com/pt/news/blood-ptau217-predicts-risk-of-cognitive-impairment): Uma análise observacional agrupada de 2.684 adultos inicialmente sem comprometimento associou maiores níveis sanguíneos de p-tau217 a um maior risco futuro de comprometimento cognitivo; as estimativas de 10 anos para o grupo mais alto eram menos certas. - [O ensaio LatAm-FINGERS testa um programa multidomínio para o risco de declínio cognitivo](https://nootropikler.com/pt/news/latam-fingers-lifestyle-cognition-trial): Um grande ensaio randomizado na América Latina testou exercício, dieta, treinamento cognitivo e gerenciamento de risco vascular em idosos em risco; a intervenção produziu uma vantagem modesta em seu desfecho cognitivo primário. - [Ceperognastat não retardou a progressão clínica em um ensaio de Alzheimer](https://nootropikler.com/pt/news/ceperognastat-alzheimers-phase2-trial-no-clinical-benefit): Em um ensaio de fase 2 com 327 pessoas, ceperognastat não retardou de forma significativa a doença de Alzheimer sintomática precoce ao longo de 100 semanas; a dose mais alta apresentou progressão modelada mais rápida do que o placebo. - [Agências dos EUA abrem processo para regulamentar produtos concentrados de 7-OH.](https://nootropikler.com/pt/news/dea-begins-7-oh-scheduling-process): A atualização da FDA de 13 de julho descreveu uma proposta de classificação temporária para 7-OH concentrado e derivados sintéticos, distinguindo o processo de uma ordem final. - [Sons aleatórios durante a sesta perturbaram as ondas lentas e a recordação](https://nootropikler.com/pt/news/random-sleep-audio-disrupted-slow-waves-and-recall): Num estudo com duas sessões de sesta, envolvendo 20 homens saudáveis, sons aleatórios reduziram o sono de ondas lentas e prejudicaram a recordação associativa de figuras, mas não a memória verbal nem a procedimental; o artigo foi publicado a 25 de junho e Freiburg anunciou os resultados a 9 de julho. - [Padrão regional de idade cerebral associou um marcador sanguíneo de tau à cognição](https://nootropikler.com/pt/news/regional-brain-age-pattern-links-tau-marker-and-cognition): Uma análise transversal de 71 adultos mais velhos encontrou uma associação indireta entre p-tau217 e cognição através de um padrão de idade cerebral em ressonância magnética; as associações diretas e totais não foram significativas. - [Ruído durante o sono interrompeu sinais de memória hipocampal em ratos](https://nootropikler.com/pt/news/sleep-noise-interrupts-hippocampal-memory-consolidation-in-rats): Em ratos dormindo, sons breves temporizados com ondulações agudas do hipocampo reduziram a atividade das ondulações e prejudicaram a retenção em uma tarefa de memória, enquanto os efeitos variaram conforme a tarefa. - [Dois marcadores de MRI foram associados à progressão cognitiva em esclerose múltipla precoce](https://nootropikler.com/pt/news/multiple-sclerosis-mri-markers-cognitive-progression): Em 87 pessoas com esclerose múltipla recidivante-remitente precoce, os marcadores de RM ao diagnóstico foram associados ao declínio cognitivo posterior independentemente de recidivas ou atividade de RM. - [A farinha de milho fortificada não melhorou os resultados cognitivos em um estudo com adolescentes etíopes](https://nootropikler.com/pt/news/vitamin-fortified-corn-flour-teen-cognition-ethiopia): Um ensaio de seis meses com 472 meninas não encontrou benefício cognitivo significativo da farinha de milho fortificada com folato e vitamina B12; uma diferença no teste de linguagem surgiu numa análise secundária por estado de atraso no crescimento. - [Maior consumo de alimentos ultraprocessados associou-se a pior atenção numa coorte australiana](https://nootropikler.com/pt/news/ultra-processed-foods-attention-apoe4): Uma análise transversal de 2.192 adultos australianos associou uma maior proporção de alimentos ultraprocessados a uma pontuação de atenção ligeiramente mais baixa, mas não encontrou uma associação clara com a memória e não permite estabelecer causalidade. - [FDA cita alegações sobre Alzheimer e ansiedade no site de um vendedor de chá verde](https://nootropikler.com/pt/news/fda-warns-green-tea-seller-over-disease-treatment-claims): Uma carta da FDA de 2 de julho contestou as alegações de um vendedor sobre Alzheimer, Parkinson e ansiedade em relação ao chá verde; a ação diz respeito a marketing e aprovação de medicamentos, não a um novo ensaio de eficácia. - [Marcadores sanguíneos de Alzheimer na meia-idade relacionados com pontuações cognitivas em coorte](https://nootropikler.com/pt/news/nih-midlife-alzheimer-biomarkers-cognition): Um relatório do NIH em julho destacou um estudo de coorte CARDIA que associou marcadores de amiloide e tau no sangue a diferenças cognitivas na meia-idade; os resultados são observacionais. - [Cetonas derivadas de TCM foram estudadas como um combustível cerebral alternativo durante a hipoglicemia](https://nootropikler.com/pt/news/mct-ketones-hypoglycemia-working-memory-t1d): Um pequeno estudo em humanos descobriu que quatro semanas de uma dieta com TCM (triglicerídeos de cadeia média) estavam associadas a uma melhor precisão da memória de trabalho durante hipoglicemia induzida em diabetes tipo 1; o tempo de reação não melhorou. - [Sequências teta no hipocampo acompanharam metas lembradas em ratos](https://nootropikler.com/pt/news/goal-directed-hippocampal-theta-navigation): Em ratos navegando em uma arena aberta, sequências teta hipocampais dependentes de aprendizado previam rotas para objetivos lembrados e se coordenavam com a atividade pré-frontal. Isso identifica um circuito candidato ao planejamento, mas não prova que as sequências causam a navegação. ## Nootropik News — Русский - [Изменения настроения и навязчивые мысли были связаны с запоминанием намеченных действий](https://nootropikler.com/ru/news/affective-changes-intrusive-thoughts-prospective-memory): У 120 взрослых младшего и старшего возраста изменения настроения и ощущение контроля над навязчивыми мыслями были связаны с проспективной памятью; в анализ вошли 117 человек. Эксперимент не доказывает причинной связи, лечебного эффекта улучшения настроения или влияния навязчивых мыслей на различия. - [Журнал Nature Neuroscience выпускает специальный выпуск о нейротехнологиях и интерфейсах «мозг-компьютер»](https://nootropikler.com/ru/news/neurotechnology-special-issue-editorial-october-2026): Редакционная статья от 1 октября вводит специальный выпуск о том, как нейротехнологии связывают мозговые исследования, вспомогательные устройства и вопросы управления данными; это обзорная редакционная статья, а не новый эксперимент. - [Шаблоны связности мозга различались при патологии Альцгеймера и старении. ](https://nootropikler.com/ru/news/alzheimer-connectivity-gradients-aging-biofinder-adni): Анализы МРТ в BioFINDER-2 и ADNI связали патологию Альцгеймера и возраст с различными градиентами связи всей коры головного мозга. Результаты когорты описывают ассоциации и не устанавливают диагностический тест или причинный механизм. - [Небольшое исследование смеси чёрной смородины выявило изменения избирательного внимания у пожилых людей](https://nootropikler.com/ru/news/blackcurrant-theanine-pine-bark-attention-crossover): В исследовании 26 пожилых участников принимали смесь чёрной смородины, L-теанина и сосновой коры или плацебо четырёхнедельными курсами. Ложные срабатывания внимания снизились. Результаты памяти и усталости не сохранили значимость после поправки на множественные сравнения; эффект нельзя приписать одному компоненту. - [Модель машинного обучения прогнозировала будущие когнитивные нарушения при болезни Паркинсона.](https://nootropikler.com/ru/news/parkinsons-tabpfn-cognitive-impairment-prediction): Ретроспективное исследование сообщило о значениях AUC 0.822 внутри выборки и 0.742 во внешней когорте для модели TabPFN. Авторы заявляют, что перед клиническим применением требуется проспективная многоцентровая валидация. - [Популяции нейронов гиппокампа человека несут информацию о значении слов](https://nootropikler.com/ru/news/human-hippocampus-distributed-semantic-code): Записи во время прослушивания повествования связывали распределенные паттерны активности гиппокампа с семантикой слов, включая данные после учета фонетики и грамматики. - [Краткое исследование чёрного кардамона сообщает об улучшении результатов тестов внимания при финансировании отрасли](https://nootropikler.com/ru/news/black-cardamom-extract-short-attention-trial): В 14-дневном исследовании 96 взрослых случайным образом распределили по группам: экстракт чёрного кардамона, кофеин, их сочетание или плацебо; в итоговый анализ вошли 85 человек. Сообщённые улучшения тестов требуют независимого подтверждения и не доказывают стойкую когнитивную пользу. - [Совпадение условий маски помогло распознаванию в одном из двух экспериментов с памятью на лица](https://nootropikler.com/ru/news/masked-face-recognition-context-congruency): Два эксперимента с использованием реалистичных изображений низкого разрешения выявили эффект согласованности, когда замаскированные лица кодировались в первом эксперименте, но не во втором. Общая точность была умеренной. - [Записи активности мозга выявили общие и различные сигналы воображаемой и произнесённой речи](https://nootropikler.com/ru/news/imagined-speech-neural-architecture-ecog): Записи высокой плотности, полученные во время нейрохирургической операции с пациентами в сознании, выявили общие сигналы планирования и разные сенсомоторные паттерны для воображаемых и произнесённых слогов. Результат может помочь в разработке будущих речевых интерфейсов. - [Исследование на мышах связывает индольный путь кишечных бактерий с повреждением при инсульте и иммунным ответом](https://nootropikler.com/ru/news/gut-microbiota-indole-stroke-severity-immune-response): Эксперименты на мышах показали, что бактериальная индоловая сигнализация влияет на иммунную активность после инсульта и повреждение мозга. Когорта людей с инсультом показала связь между количеством бактериального гена tnaA и худшими исходами, но механизм у людей остается неподтвержденным. - [У шести видов при анестезии наблюдалась общая сигнатура нейродинамики](https://nootropikler.com/ru/news/cross-species-neural-dynamics-under-anesthesia): Межвидовой анализ записей мозга показал более короткие локальные нейронные временные масштабы и более слабую межрегиональную синхронизацию при анестезии; стимуляция таламуса изменила этот паттерн у макак. - [Радиопитание без батареи стимулирующее устройство работало у свободно передвигающихся мышей](https://nootropikler.com/ru/news/wireless-rf-neurostimulation-freely-moving-mice): В исследовании на животных проверяли беспроводной транскраниальный стимулятор, работающий на радиоволновой энергии; он поддерживал выходную мощность по всей клетке и вызывал кружение при нацеливании на моторную область. - [Использование телевизора и компьютера показало противоположные связи с когницией у пожилых людей](https://nootropikler.com/ru/news/screen-time-types-and-cognition-older-adults): В четырех возрастных когортах большее время просмотра телевизора было связано с более низкими когнитивными показателями, тогда как использование компьютера было связано с более высокими показателями. Результаты менделевской рандомизации предоставили поддерживающие, но зависимые от предположений доказательства. - [Неопределенность в окружающей среде снижала усилия по планированию в человеческой задаче ](https://nootropikler.com/ru/news/environmental-stochasticity-reduces-human-planning-effort): При трёх формах неопределённости среды участники быстрее принимали первое решение — показатель меньших затрат на планирование — и использовали более простые стратегии, менее чувствительные к ценности вариантов. - [Слои коры изменялись по-разному, когда мыши осваивали задачу с усиком](https://nootropikler.com/ru/news/cortex-wide-laminar-dynamics-learning-mice): Широкопольное изображение по 25 кортикальным зонам выявило разные, иногда противоположные изменения активности слоев 2/3 и 5 у самцов мышей в процессе обучения задаче, связанной с усами. Исследование отображает динамику, связанную с обучением, но не выделяет все причинные вклады. - [Исследование не выявило обнаруживаемых различий APOE ε4 в когнитивных функциях среди здоровых молодых взрослых](https://nootropikler.com/ru/news/apoe4-young-adult-cognition-navigation-null): Среди 1000 здоровых взрослых в возрасте 18–35 лет носители ε3ε4 не отличались от носителей ε3ε3 по показателям навигации или нескольким когнитивным задачам. Этот результат относится к данной выборке и возрастному диапазону. - [Микробиота кишечника и индол-3-молочная кислота связаны с восстановлением когнитивных функций в исследовании нарушений сосудистой системы](https://nootropikler.com/ru/news/gut-ila-axis-vascular-cognitive-impairment): Клиническое когортное исследование и эксперименты на мышах связали микробный метаболизм триптофана с когнитивными функциями и работой глимфатической системы. Клинические наблюдения носили предварительный характер; данные о вмешательстве получены на мышах. - [Путь миндалевидного тела к стриатуму модулировал повторяющееся поведение у мышей](https://nootropikler.com/ru/news/amygdala-striatum-circuit-repetitive-behavior-mice): В исследовании на мышах описали прямую проекцию миндалины в дорсолатеральный стриатум, которая модулировала вызванный стимулом груминг и была усилена в модели компульсивного груминга. Это наблюдение о нейронной цепи у животных, а не свидетельство причины заболевания или эффективности лечения у людей. - [Малые биопсии живого мозга предоставили прямой взгляд на патологию Альцгеймера.](https://nootropikler.com/ru/news/alzheimer-pathology-living-brain-biopsy-proteomics): У 18 человек, проходивших шунтирующую операцию из-за подозрения на гидроцефалию с нормальным давлением, исследователи обнаружили амилоидные бляшки в девяти биопсиях и провели картирование химического состава бляшек и оборота тау-белка. Выборка для операции ограничивает возможность обобщения результатов. - [Атлас, поддерживаемый NIH, отображает активность клеток при мозговых расстройствах](https://nootropikler.com/ru/news/nih-single-cell-atlas-brain-disorders): NIH объявил о создании молекулярных карт на основе более чем 6,3 миллиона ядер клеток от 1 494 доноров, предоставляющих исследовательский ресурс для болезни Альцгеймера и связанных с ней нарушений мозга. - [Резус-макаки корректировали скорость принятия решений в зависимости от точности](https://nootropikler.com/ru/news/macaques-metacognitive-control-decision-accuracy): В задаче с двумя вариантами ответа макаки-резусы показывали большую точность при более быстрых ответах, даже с учётом сложности. Модель мониторинга могла бы объяснить эту закономерность, хотя она напрямую не доказывает наличие субъективной уверенности. - [Анализ биомаркеров COSMOS не выявил эффекта мультивитаминов или экстракта какао за два года](https://nootropikler.com/ru/news/cosmos-multivitamin-cocoa-neurodegeneration-biomarkers): В подисследовании рандомизированного испытания среди пожилых людей ни поливитамины, ни экстракт какао не изменили три показателя крови в течение двух лет по сравнению с плацебо. Эти результаты по биомаркерам не решают вопрос о том, влияют ли добавки на когнитивные функции через другие пути. - [Оценки визуального внимания не были явно взаимозаменяемыми между двумя задачами](https://nootropikler.com/ru/news/visual-attention-estimates-depend-on-task): Тридцать участников выполнили два задания на визуальное внимание. Средние оценки составили 58 Гц в одном и 49 Гц в другом, однако анализы не выявили явной разницы или равенства. - [Стимуляция, направленная на полосатое тело, изменила выбор относительно умственных усилий в исследовании на людях](https://nootropikler.com/ru/news/temporal-interference-stimulation-mental-effort): В небольшом эксперименте со здоровыми взрослыми стимуляция временными интерференциями изменяла то, как участники оценивали вознаграждения и когнитивные усилия, наряду с изменениями сигналов в стриатуме и поясной извилине. - [Диета по типу MIND, основанная на приемах пищи, улучшила когнитивные показатели в небольшом исследовании при легких когнитивных нарушениях. ](https://nootropikler.com/ru/news/mind-based-diet-mci-cluster-rct-korea): В открытом 12-недельном корейском исследовании с участием 80 взрослых с лёгким когнитивным нарушением, обе группы, получавшие питание по диете MIND с предоставляемыми приёмами пищи, улучшили показатели K-MMSE2 по сравнению с контролем; в аннотации размер эффекта не указан. - [Небольшая когорта людей связывает воздействие загрязнителей, микробов кишечника и показатели внимания.](https://nootropikler.com/ru/news/pah-gut-microbiome-attention-impulsivity-cohort): У 34 взрослых измеряли воздействие полициклических ароматических углеводородов, профили микробиома и нейроповеденческие группы. Ни один отдельный род микроорганизмов не оказался значимо связан с поведенческой группой после поправки, поэтому кандидатные связи остаются исследовательскими. - [Взаимные сигналы зрительной коры помогли областям мозга мыши прийти к согласию](https://nootropikler.com/ru/news/reciprocal-visual-cortex-connections-consensus): Записи активности мозга у мышей, оптогенетические возмущения и модели цепей показали, что взаимные соединения V1–LM продлевают согласованную визуальную активность, одновременно разрешая противоречивые сигналы. Это открытие касается простой зрительной задачи и интерпретации на основе модели. - [Сочетанная программа призм и игр улучшила некоторые когнитивные показатели после инсульта.](https://nootropikler.com/ru/news/mindlenses-poststroke-cognitive-rehabilitation-trial): В рандомизированном исследовании инсульта с участием 60 человек устройство с призматической адаптацией и планшетной игрой улучшало память через три месяца и речь на проверках после лечения по сравнению со стандартной реабилитацией. - [Повседневная усталость и высокая скорость обработки предшествовали снижению способности действовать вопреки усталости](https://nootropikler.com/ru/news/fatigue-processing-speed-override-daily-life): Скоординированный анализ шести исследований в реальных условиях показал, что выше обычного уровень усталости и более высокая скорость обработки информации предсказывали более сильную связь между усталостью и производительностью через несколько часов, что является маркером меньшего подавления усталости. - [FDA расширило предупреждение о токсичном жёлтом олеандре на продукты Niwali и Easy Forte](https://nootropikler.com/ru/news/fda-yellow-oleander-niwali-easy-forte-alert): После обнаружения токсичного жёлтого олеандра в ходе тестирования FDA добавило Niwali Tejocote Pieces, Niwali Tejocote Capsules и Easy Forte Natural Fiber к действующему предупреждению о безопасности. Ведомство рекомендует прекратить использование и обратиться к медицинскому специалисту. - [Профиль кровяных метаболитов связывает соблюдение средиземноморской диеты с выбранными когнитивными показателями](https://nootropikler.com/ru/news/mediterranean-diet-metabolite-signature-cognition-cohorts): В исследовании двух когорт выделили профиль 23 метаболитов крови, связанный с соблюдением средиземноморской диеты и некоторыми когнитивными показателями. Перенос модели на вторую когорту работал слабо, пока её не перекалибровали; исследование было наблюдательным. - [Астроциты формировали временные последовательности активности во время воспоминания у мышей](https://nootropikler.com/ru/news/hippocampal-astrocyte-sequences-memory-mice): Изображения у мышей показали сжатые последовательности кальция астроцитов CA1 во время обучения страху и их повторное появление в обусловленном контексте. Записи являются корреляционными и не показывают, что астроциты создают или необходимы для памяти. - [Клетки мозжечка отслеживали отложенные награды за нейронную стимуляцию у мышей](https://nootropikler.com/ru/news/cerebellar-dopamine-reward-prediction-mice): У мышей клетки-зёрна мозжечка предсказывали отсроченные вознаграждения при стимуляции дофаминовых нейронов или медиального пучка переднего мозга; лазающие волокна реагировали позже. Экспериментальные вмешательства указывают на роль этой системы в задаче, но не устанавливают влияния на когнитивные функции человека. - [Изменения памяти на узнавание отслеживали прогрессирование в когорте раннего Альцгеймера](https://nootropikler.com/ru/news/alzheimer-recognition-memory-progression-cohort): В исследовании длительностью 24 месяца с участием 278 пожилых людей с амнестическим лёгким когнитивным нарушением более низкая точность различения при узнавании и раннее снижение показателей предсказывали переход к деменции при болезни Альцгеймера после статистической поправки на другие показатели. - [Социальное неблагополучие постоянно связывалось с более низкими самооценочными показателями памяти в большой когорте.](https://nootropikler.com/ru/news/social-disadvantage-subjective-memory-longitudinal-cohort): На основании шести волн данных 14 938 китайских взрослых в возрасте 45 лет и старше, накопленные социальные неблагоприятные условия были связаны с постоянно низкой самооценкой памяти, которая слабо коррелировала с объективными когнитивными показателями. - [Алгоритмы адаптивного интерфейса мозг-компьютер изменили нейронное обучение у обезьян](https://nootropikler.com/ru/news/assistive-algorithms-shape-bci-learning): Продольные записи и модель нейронной сети показывают, что адаптивные декодеры BCI концентрировали информацию о задаче в меньшем числе нейронных сигналов во время тренировки, в отличие от фиксированных декодеров. - [Перекрывающиеся вентральные гиппокампальные коды отслеживали быстрое извлечение воспоминаний о страхе у мышей](https://nootropikler.com/ru/news/ventral-hippocampus-overlapping-fear-memory-codes): Изображения кальция у мышей показали, что обучение страху делало представления угрожающего и нейтрального контекста более похожими в вентральной области CA1, где активность, связанная с угрозой, быстро возвращалась при воспоминании. - [Один мозговой имплантат расшифровал речь и жесты одновременно в исследовании паралича](https://nootropikler.com/ru/news/speech-gesture-paralysis-brain-computer-interface): Исследование с участием трёх человек использовало один кортикальный имплантат для декодирования попыток речи и жестов, демонстрируя доказательство концепции более естественного общения через интерфейс мозг-компьютер. - [Эффективность сна, а не его продолжительность, отслеживала показатели исполнительных функций в течение двух лет ](https://nootropikler.com/ru/news/sleep-efficiency-executive-function-repeated-cohort): Среди 233 взрослых в возрасте 55 лет и старше более высокая эффективность сна, измеренная с помощью носимых устройств, была связана с лучшей исполнительной функцией, тогда как продолжительность сна и самооценка его качества не показали значимой связи с когнитивными областями. - [Обзор обобщает наблюдательные данные о связи пищевого холина с когнитивными функциями](https://nootropikler.com/ru/news/dietary-choline-cognition-observational-evidence-review): Систематический обзор и дозозависимый метаанализ оценили наблюдательные исследования связи пищевого холина с когнитивными исходами. Данные показывают только ассоциации и не доказывают, что добавки холина предотвращают когнитивное снижение. - [Обучение страху изменяло тормозные синапсы в различных частях нейронов CA1 у мышей.](https://nootropikler.com/ru/news/ca1-inhibitory-synapses-remodel-with-fear-learning): Продольная визуализация показала, что условное обучение на основе страха перестроило дендритные ингибирующие синапсы, но стабилизировало синапсы на начальном сегменте аксона пирамидальных нейронов гиппокампа. - [Необеспеченность продовольствием и стресс были связаны с различиями в результатах когнитивных задач у студентов колледжей](https://nootropikler.com/ru/news/food-insecurity-stress-college-student-cognition): Поперечное исследование 230 студентов колледжей связало необеспеченность продовольствием и стресс с различиями в результатах задач на внимание, принятие решений и сопоставление образов памяти. Эти связи не позволяют установить, что доступ к пище вызвал такие результаты. - [Метаанализ выявил предварительные когнитивные эффекты кетогенных диет, но также повышение липидов крови](https://nootropikler.com/ru/news/ketogenic-diet-cognitive-impairment-meta-analysis): Обзор 12 испытаний выявил предварительные признаки когнитивного эффекта у пожилых людей с нарушениями, наряду с повышением общего холестерина и холестерина ЛПНП. - [Исследования упражнений указывают на различные паттерны активации мозга при рабочей памяти](https://nootropikler.com/ru/news/exercise-working-memory-fmri-meta-analysis): Метаанализ вероятности активации по 11 исследованиям фМРТ выявил частично различающиеся изменения активности после программ физических упражнений и у людей, длительно занимающихся спортом. Из-за небольшого объёма данных полученные карты следует считать предварительными. - [Исследование после COVID сообщает о связях между микробами кишечника и показателями мозговой визуализации](https://nootropikler.com/ru/news/post-covid-gut-microbiome-brain-imaging-associations): Небольшое поперечное исследование выявило связь между составом кишечной микробиоты, симптомами и показателями МРТ при постковидном состоянии. Оно не показывает, что микробиом вызвал изменения мозга или симптомы. - [Стимуляция рядом с нервом показала перспективу в качестве ЭЭГ-показателя в небольшом исследовании сознания](https://nootropikler.com/ru/news/near-nerve-stimulation-consciousness-assessment): Одноцентровое пилотное исследование сравнивало стимуляцию нерва с кожной стимуляцией у 19 человек с продолжительными нарушениями сознания; авторы призывают к внешней верификации показателя на основе ЭЭГ. - [Постоянное чувство одиночества связано с более плохим состоянием здоровья у пожилых людей](https://nootropikler.com/ru/news/loneliness-isolation-trajectories-older-adult-health): Продольный анализ 4 090 взрослых жителей Англии связал хроническое одиночество с ухудшением физического и психического здоровья. Преодоление изоляции было связано с лучшими когнитивными показателями, но наблюдательные данные не устанавливают причинно-следственную связь. - [Фронтальный тау был связан с нарушением сна и ухудшением памяти](https://nootropikler.com/ru/news/frontal-tau-linked-to-disrupted-sleep-waves-and-memory): В когортах пожилых людей с использованием ПЭТ с тау, ЭЭГ и маркеров спинномозговой жидкости большее количество тау во фронтальных областях было связано с меньшей распространенностью медленных волн сна и худшей ночной памятью. - [Долгосрочное когортное исследование разделяет патологию Альцгеймера и когнитивную устойчивость](https://nootropikler.com/ru/news/alzheimer-pathology-cognitive-resilience-longitudinal-risk): В течение медианного срока 13,7 года наблюдали 3 119 пожилых людей. Патология и расчётный показатель когнитивной устойчивости независимо ассоциировались с риском деменции; наблюдательный анализ не доказывает причинную связь. - [Жажда во время езды на велосипеде в жаркую погоду влияла на оценки концентрации, а не на результаты тестов на исполнительные функции](https://nootropikler.com/ru/news/thirst-satiation-heat-exercise-executive-function): У 12 мужчин вода и внутривенный физиологический раствор обеспечивали схожую гидратацию, но солевой раствор оставлял участников более жаждущими и с большими тепловыми нагрузками; показатели выполнения задания с фланкерами и настроения различий не показывали. - [Обонятельное обучение перестроило нейронные представления у данио-рерио](https://nootropikler.com/ru/news/odor-learning-reorganizes-brain-representations-in-zebrafish): Тренировка по различению запахов у ювенильных и взрослых данио увеличивала разделение нейронных паттернов, связанных с задачей, в pDp, и эта репрезентативная геометрия отслеживала индивидуальные показатели. - [Конкуренция признаков была связана с ошибками принятия решений при неопределённых сигналах задачи](https://nootropikler.com/ru/news/feature-interference-cost-of-task-uncertainty): Поведение человека, записи V1 у обезьян и моделирование связывали неопределенность относительно того, какую перцептивную задачу выполнять, с более сильным кодированием нерелевантных признаков и менее отчетливыми нейронными представлениями. - [Редкие корковые тормозные нейроны усиливали синхронную активность и сон у мышей](https://nootropikler.com/ru/news/cortical-sst-chodl-neurons-promote-sleep-mice): Избирательная активация тормозных нейронов Sst-Chodl усиливала синхронизацию коры и сон у мышей. Публикация в журнале в сентябре развивает исследования нейронных цепей, ранее доступные в виде препринта; она не доказывает эффективность лечения сна у людей. - [Конструкция субмикронных электродов с автономной поддержкой направлена на гибкие записи с поверхности мозга](https://nootropikler.com/ru/news/submicron-ecog-electrode-array): Инженеры сообщили о тонком, свободно стоящем массиве электрокортикографии, вдохновлённом структурой крыльев стрекозы, решающем проблему выбора материала, актуальную для будущих интерфейсов «мозг-компьютер». - [Программа реабилитации больных Паркинсоном в сообществе сопровождалась улучшением результатов когнитивных тестов](https://nootropikler.com/ru/news/parkinsons-pd-core-cognitive-rehabilitation): В исследовании с до- и после-тестированием 45 человек, семисессионная групповая программа сопровождалась улучшениями в тестах на общую когнитивную функцию и практическое суждение. Без контрольной группы исследование не может отделить эффекты лечения от эффекта практики или других изменений. - [Процесс митохондрий, связанный с тау, снижал дефициты на моделях животных. ](https://nootropikler.com/ru/news/nih-tau-mitochondria-reverse-electron-transport): NIH выделил эксперименты, связывающие измененный тау с обратным электронным транспортом в митохондриях; блокирование этого пути помогало моделям, но не пациентам в клиническом испытании. - [Многопрофильный анализ здоровья отслеживал когнитивное старение в трех когортах.](https://nootropikler.com/ru/news/intrinsic-capacity-profile-cognitive-aging-three-cohorts): Среди 26 022 взрослых в трёх возрастных когортах нарушения некогнитивных аспектов здоровья были связаны с более низкими когнитивными показателями и большим риском последующих когнитивных нарушений. - [Исследование связывает более длительный дневной сон с более медленной скоростью обработки информации у пожилых людей](https://nootropikler.com/ru/news/pointer-zzz-napping-apnea-cognition): Базовый анализ 686 пожилых участников программы POINTER в США связал более длительные дневные дремы с более низкой скоростью обработки информации; причинно-следственная связь и взаимодействие с апноэ не были установлены. - [Многоомный анализ предлагает кандидатов на биомаркеры болезни Паркинсона, связанные со стадией](https://nootropikler.com/ru/news/parkinsons-proteo-metabolomic-stage-biomarkers): Вторичный анализ данных Инициативы по маркерам прогрессирования болезни Паркинсона комбинировал белки и метаболиты в спинномозговой жидкости и плазме для выявления кандидатов на маркеры. Результаты машинного обучения являются исследовательскими и требуют независимой клинической валидации. - [Когортные данные UK Biobank связывают плотность потребления ниацина с когнитивными функциями и риском деменции](https://nootropikler.com/ru/news/niacin-diet-density-cognition-dementia-cohort): Крупное когортное исследование населения изучало диетические эквиваленты ниацина в связи с когнитивной функцией и появлением деменции; его наблюдательный дизайн не может показать, что увеличение потребления ниацина предотвращает снижение функции. - [SUPPLX отзывает два продукта после обнаружения неуказанного йохимбина](https://nootropikler.com/ru/news/fda-recalls-products-undeclared-yohimbine): SUPPLX добровольно отозвала Business Pill и Branch Manager for Men после того, как тесты выявили неуказанный йохимбин; FDA опубликовало уведомление 4 сентября. - [Отличительные воспоминания были связаны с более точным визуальным вниманием](https://nootropikler.com/ru/news/distinct-memories-help-focus-on-visual-targets): В исследовании на людях с использованием фМРТ и задачи визуального поиска с отслеживанием движений глаз более отчетливые паттерны памяти в гиппокампе были связаны с более точными движениями глаз, направляемыми памятью, и меньшей активацией конкурентов. - [Структурированная ранняя практика формировала гибкое обучение у мышей.](https://nootropikler.com/ru/news/structured-practice-shaped-flexible-learning-in-mice): У мышей, обучавшихся задаче на определение времени, структурированные ранние примеры поддерживали более гибкие последующие стратегии и активность энторинальной коры, связанную с задачей; исследование также проверяло предсказания модели нейронной сети. - [Европейское исследование связывает слишком долгий сон и дневные дремоты с нарушением когнитивных функций](https://nootropikler.com/ru/news/european-sleep-duration-cognition-share-analysis): Кросс-секционное исследование 88 889 интервью SHARE выявило связь между сном не менее 10 часов и дневным сном с низкой когнитивной функцией; нельзя установить, вызывают ли модели сна ухудшение когнитивных функций. - [Малое плацебо-контролируемое исследование болезни Альцгеймера сообщает о когнитивных улучшениях после стимуляции мозжечка.](https://nootropikler.com/ru/news/alzheimer-cerebellar-rtms-fnirs-rct): В 33-участниковом рандомизированном исследовании двухнедельная церебеллярная rTMS сопровождалась лучшей глобальной когнитивной функцией по сравнению с имитацией до 12-й недели. Изменения fNIRS были гемодинамическими измерениями, а не прямыми записями нейронной активности. - [Биомаркеры Альцгеймера обозначили подгруппу пациентов с болезнью Паркинсона с более быстрым прогрессированием](https://nootropikler.com/ru/news/parkinsons-alzheimer-biomarker-cognitive-profiles): Из 449 участников когорты с положительным тестом на α-синуклеин 42 соответствовали критериям биомаркеров болезни Альцгеймера и позже показали более выраженное снижение когнитивных и двигательных функций. Это прогностическая ассоциация, а не причинная связь. - [Семаглутид улучшил показатели памяти у пожилых мышей; влияние на человека неизвестно](https://nootropikler.com/ru/news/nih-semaglutide-late-life-mice-cognition): Исследование на мышах, о котором сообщил NIH, показало, что семаглутид в позднем возрасте улучшал показатели пространственной памяти; клиническая значимость для людей не установлена. - [Две париетальные области мозга мыши показали различные роли в визуальных и выборочных задачах](https://nootropikler.com/ru/news/mouse-parietal-cortex-functional-architecture): Мезоскопическая визуализация тысяч нейронов мыши показала, что медиальные париетальные области AM и A по-разному представляли визуальную/выборочную информацию и историю выбора/позу. Исследование отражает функциональную организацию; оно не устанавливает, что именно эти области вызывают поведение. - [Сдвиг сигнальных состояний рецепторов AMPA в синапсах мыши из-за смещения концентрации глутамата](https://nootropikler.com/ru/news/glutamate-levels-tune-ampa-receptor-conductance): Эксперименты на синапсах интернейронов мышей показали, что сниженная экспозиция глутамата изменяет свойства AMPA-рецепторов через занятость различных состояний проводимости. - [Исследование описывает разные царства кишечных микроорганизмов при большом депрессивном расстройстве и когнитивных нарушениях](https://nootropikler.com/ru/news/multi-kingdom-gut-microbiome-depression-cognition): Исследование 121 молодого взрослого с депрессией при первом эпизоде и 117 контрольных участников выявило различия в бактериальных, вирусных, грибковых и архейных сигналах. Его поперечный дизайн не позволяет установить, что изменения микробиома вызывают депрессию или когнитивные различия. - [Метод визуализации мозга показал, как поток сигналов в коре меняется в зависимости от психического состояния.](https://nootropikler.com/ru/news/human-cortical-signal-flow-hierarchy-changes-with-state): Валидированная модель эффективной связности позволила оценить иерархию коры человека: она уплощалась при обработке информации, направленной вовне, и становилась более выраженной при внутренней сосредоточенности. - [Модель ИИ восстановила сигналы глубинных структур мозга по корковым записям для исследований DBS](https://nootropikler.com/ru/news/deep-learning-subcortical-signal-reconstruction-dbs): В многоцентровом анализе записей людей с двигательными расстройствами проверяли, может ли генеративная модель выводить подкорковую активность по сигналам коры, чтобы восполнить пробелы в данных о стимуляции с обратной связью. - [Отчеты испытаний по питательной поддержке во время беременности регистрируют различия в структурах мозга плода](https://nootropikler.com/ru/news/mikhuna-prenatal-diet-fetal-brain-growth): В эквадорском рандомизированном исследовании с участием 215 беременностей программа по разнообразию питания была связана с различиями в росте нескольких структур мозга плода; исследование измеряло анатомию, а не последующую когнитивную функцию. - [Пробиотическое исследование при раннем когнитивном нарушении изучает когнитивные функции и маркеры тау](https://nootropikler.com/ru/news/multistrain-probiotics-early-cognitive-impairment): 24-недельное рандомизированное исследование, проведённое с участием 87 человек с ранними когнитивными нарушениями, выявило снижение уровня pTau181 и селективные визуально-пространственные показатели, но не выявило различий по MMSE, вербальной памяти или исполнительным функциям. - [Тета-ритмы могут отмечать воспоминания для консолидирования во сне](https://nootropikler.com/ru/news/theta-rhythms-may-mark-memories-for-sleep-consolidation): У 31 молодого взрослого электроэнцефалограмма во время изучения пар «слово–объект» связывала более выраженную тета-активность с последующим связыванием со спящими волнами и сохранением памяти после сна; эта связь не устанавливает причинность. - [То, как воспоминание вспоминается, оставляет след в последующей мозговой активности](https://nootropikler.com/ru/news/recalling-a-memory-leaves-a-trace-in-brain-activity): В эксперименте с фМРТ подсказки для извлечения формировали последующие нейронные паттерны для изученных пар изображение–слово, даже несмотря на то, что участники показывали схожие результаты на тесте памяти. - [FDA предупреждает о глутатионе в добавках, используемом в инъекционных препаратах. ](https://nootropikler.com/ru/news/fda-glutathione-injection-quality-alert): FDA сообщило о неблагоприятных событиях как минимум у 30 пациентов после введения компаундного внутривенного глутатиона и предостерегло от использования материала пищевой добавки для инъекций. - [Стимуляция спинного мозга в сочетании с тренировкой на беговой дорожке оказала ограниченное влияние на походку при болезни Паркинсона. ](https://nootropikler.com/ru/news/parkinson-spinal-magnetic-stimulation-treadmill-trial): В рандомизированном исследовании болезни Паркинсона с участием 70 человек стимуляция в сочетании с тренировкой на беговой дорожке дала краткосрочные сигналы об увеличении скорости ходьбы и более позднем уменьшении замираний при ходьбе, но устойчивого общего преимущества не выявили. - [Отчет NIH описывает различия в сворачивании ДНК при старении и болезни Альцгеймера.](https://nootropikler.com/ru/news/nih-dna-organization-alzheimers-aging): Августовский отчет NIH отметил измененные контакты ДНК и активность генов в посмертных префронтальных клетках доноров с болезнью Альцгеймера; исследование не устанавливает причинно-следственную связь. - [Глютамин не изменял настроение или когнитивные функции во время кратковременного моделированного воздействия на большой высоте.](https://nootropikler.com/ru/news/glutamine-hypoxia-cognition-rct): В рандомизированном исследовании молодых мужчин шесть часов имитации гипоксии на высоте 4500 м не изменяли психобиологические показатели, а добавки глютамина не приносили ощутимой пользы. - [Исследование с арахисом не выявило значительной пользы для когнитивных функций или активации мозга](https://nootropikler.com/ru/news/peanut-consumption-memory-complaints-rct): 12-недельное испытание с арахисом у 27 пожилых людей с жалобами на память не выявило значительных различий между группами в когнитивных функциях, активации мозга или скорректированных биомаркерах. - [Нейроны, реагирующие на бодрствование, помогали регулировать потребность во сне у мышей](https://nootropikler.com/ru/news/wake-history-neurons-regulate-sleep-drive-in-mice): Манипулирование нейронами, реагирующими на бодрствование, у мышей изменяло NREM-сон и давление сна, выявляя кандидатов на схемы регуляции сна без демонстрации того, что сокращение сна безопасно. - [Долгоживущие органоиды мозга проявили особенности поздних этапов развития человека](https://nootropikler.com/ru/news/nih-brain-organoids-long-term-maturation): По сообщению NIH, органоиды мозга из стволовых клеток созревали почти шесть лет, а молекулярные показатели возраста менялись в соответствии со временем культивирования; это лабораторные модели. - [Мозг мышей повторно использовал нейронные компоненты в когнитивных операциях](https://nootropikler.com/ru/news/reusable-modular-cognition-mouse-brain): В задаче с отсроченным выбором мыши повторно использовали подпространства префронтальной и теменной коры для обработки стимулов и удержания памяти. Сетевые модели поддержали модульную интерпретацию, но вывод относится к одной задаче и не доказывает наличие когнитивных модулей у людей. - [Средиземноморская диета изменяет метаболические показатели в промежуточном анализе MCI](https://nootropikler.com/ru/news/mediterranean-diet-metabolomics-mci-interim): У 47 пожилых людей с легкими когнитивными нарушениями 24-недельное вмешательство с соблюдением средиземноморской диеты изменило несколько плазменных метаболитов; некоторые изменения метаболитов коррелировали с когнитивными показателями. Корреляция не устанавливает когнитивную пользу. - [FDA обновляет существующее предупреждение об импорте кратома с записью поставщика за август](https://nootropikler.com/ru/news/fda-adds-kratom-supplements-to-import-detention-alert): Версия FDA Import Alert 54-15 от 17 августа включает нового перечисленного поставщика; механизм задержания крамта был разработан до 2026 года и применяется к указанному импорту. - [Испытание средиземноморской диеты с повышенным содержанием белка выявило небольшие различия в когнитивных показателях](https://nootropikler.com/ru/news/promed-protein-mediterranean-exercise-cognition): В шестимесячном исследовании 105 пожилых людей с риском недоедания и когнитивного снижения в группах диетологических консультаций улучшился нутритивный статус и наблюдались небольшие различия в нейрокогнитивных показателях по сравнению с контрольной группой, получившей информационную листовку. - [Исследование на хлебе с пребиотическими волокнами, фокусирующееся на осуществимости и когнитивных функциях у пожилых людей](https://nootropikler.com/ru/news/prebiotic-fibre-bread-older-adults-feasibility): В исследовании осуществимости оценивали хлеб, дававший дополнительно 10 г пребиотической клетчатки в день, у пожилых людей с низким обычным потреблением клетчатки; исследование было рассчитано на оценку выполнимости и предварительных результатов. - [Следы памяти сохранялись во время искусственной спячки у мышей](https://nootropikler.com/ru/news/memory-traces-persist-after-artificial-hibernation-in-mice): После индуцированной спячки у мышей некоторые воспоминания сохранялись несмотря на потерю более половины синапсов гиппокампа; кластерные связи, связанные с памятью, сохранялись в первую очередь. - [TIMP2 изменял возрастные состояния микроглии у мышей](https://nootropikler.com/ru/news/timp2-microglia-aging-mouse-brain): Удаление TIMP2 ухудшало несколько возрастных показателей микроглии у мышей, в то время как лечение пожилых мышей изменяло воспалительные профили и фагоцитоз. Эти доклинические данные не показывают когнитивной пользы и не устанавливают безопасное вмешательство для человека. - [Небольшое исследование связывает плазмалогены, полученные из гребешка, с более высокими показателями вербальной памяти.](https://nootropikler.com/ru/news/scallop-plasmalogens-verbal-memory-rct): 12-недельное исследование с участием 68 выбранных японских взрослых показало небольшой эффект на вербальную память от плазмалогенов, полученных из гребешков; долгосрочные эффекты остаются неизвестными. - [Сообщение Университета Висконсина освещает кишечный метаболит, связанный с изменениями при болезни Альцгеймера](https://nootropikler.com/ru/news/gut-imidazole-propionate-alzheimer-announcement): В объявлении Университета Висконсина был описан метаболит кишечных бактерий, связанный с когнитивными функциями у людей и изменениями, похожими на болезнь Альцгеймера, в экспериментальных моделях; сама статья была опубликована 26 июня. - [Двенадцатинедельное исследование креатина сообщает о разведочных когнитивных показателях вместе с изменениями силы](https://nootropikler.com/ru/news/creatine-cognition-middle-aged-older-adults-rct): 12-недельное исследование креатина с участием 64 завершивших описывало когнитивные результаты как исследовательские, в то время как участие в упражнениях и диете выбиралось самостоятельно. - [Эндоканнабиноидная пластичность поддерживала обучение с одного раза у мышей](https://nootropikler.com/ru/news/striatal-endocannabinoids-one-shot-learning-mice): Один короткий контакт с липкой лентой впоследствии вызывал избегающее поведение у мышей и пластичность кортикостриатной системы; нарушение эндоканнабиноидного пути ухудшало обучение. Новое задание на формирование отвращения является моделью на животных и не является доказательством улучшения памяти у человека. - [Пилотное исследование медитации и дыхательных практик снизило тревожность при болезни Паркинсона](https://nootropikler.com/ru/news/parkinson-meditation-breathwork-anxiety-pilot-trial): В небольшом рандомизированном пилотном исследовании шестинедельная дистанционная медитация и дыхательные упражнения снижали тревожность, связанную с болезнью Паркинсона, по сравнению с контрольной группой; исследование сосредоточилось на тревожности, а не на когнитивных функциях. - [Исследование мозговой ткани человека связывает измененное хранение глюкозы с патологией Альцгеймера](https://nootropikler.com/ru/news/brain-glucose-glycogen-alzheimer-human-brains): Исследование 230 посмертных образцов мозга выявило связь структур, связанных с гликогеном, с патологией тау при болезни Альцгеймера, в том числе на ранних патологических стадиях. Анализ тканей не позволяет установить, какие изменения возникли первыми, и поможет ли изменение рациона. - [Цифровая когнитивная тренировка улучшила показатели исполнительных функций в небольшом исследовании RBD](https://nootropikler.com/ru/news/cogtrail-rbd-cognitive-training-executive-function): У 82 человек с изолированным расстройством поведения в фазе быстрого сна (REM) пятинедельная программа цифровой когнитивной тренировки и рекомендаций по образу жизни была связана с небольшим улучшением исполнительных функций по сравнению с группой из списка ожидания. - [Голографический микроскоп позволил исследователям изучать коммуникацию между областями мозга. ](https://nootropikler.com/ru/news/two-photon-holographic-mesoscope-neural-circuits): Новая двухфотонная система стимулировала выбранные нейроны мыши на поле масштаба миллиметра при одновременном изображении downstream-ответов. Она поддерживает эксперименты с цепями в различных областях; она остается специализированным исследовательским инструментом, а не применением для человека. - [Реабилитация после терапии продвинутого Паркинсона показала возможный когнитивный эффект](https://nootropikler.com/ru/news/parkinson-device-aided-therapy-rehabilitation-cognition): В открытом рандомизированном исследовании с участием 54 человек, начинавших терапию болезни Паркинсона с использованием устройств, индивидуальная реабилитация была связана с улучшением когнитивной функции через год, что является второстепенным результатом, требующим подтверждения. - [Испытание с одинаковой дозой кофеина не выявило преимуществ энергетика для внимания](https://nootropikler.com/ru/news/caffeine-matched-energy-drink-attention-trial): В однократной сессии у 116 взрослых энергетический напиток не превосходил напиток с теми же 200 мг кофеина по показателям внимания или памяти. - [Исследователи описывают митохондриальные бляшки в мозге моделей болезни Альцгеймера. ](https://nootropikler.com/ru/news/mitochondrial-plaques-alzheimers-neuronal-processes): У мышей-моделей болезни Альцгеймера и в посмертных человеческих образцах исследователи выявили накопления митохондрий в нейронных процессах на фоне нарушенного лизосомного клиренса. Полученные данные описывают патологию; они не устанавливают лечение или когнитивный эффект. - [Ансамбли памяти у макак различались в зависимости от времени, прошедшего после обучения](https://nootropikler.com/ru/news/macaque-experience-reorganizes-memory-traces): Записи у макак показали, что реактивация во сне различалась для новых, недавних и более старых выученных последовательностей; старые воспоминания формировали более стабильные, взаимосвязанные ансамбли нейронов. Поперечное исследование приматов не отслеживало изменения отдельных клеток во времени. - [Четырехнедельное испытание с 16:8 окном питания не выявило дополнительного когнитивного эффекта](https://nootropikler.com/ru/news/time-restricted-eating-working-memory-women): У 43 здоровых женщин рабочая память и внимание со временем улучшались в обеих группах, при этом значительных когнитивных преимуществ у режима питания с ограничением времени 16:8 по сравнению с обычной диетой не наблюдалось. - [Малый пилотный отчёт GeNeurofil о когнитивных и биомаркёрных изменениях при MCI](https://nootropikler.com/ru/news/geneurofil-mci-pilot-trial): В шестимесячном пилотном исследовании с участием 54 человек с лёгким и умеренным когнитивным нарушением препарата GeNeurofil отмечалось улучшение результатов тестов и снижение плазменных маркеров; авторы призывают к проведению более масштабных подтверждающих исследований. - [Небольшое исследование болезни Альцгеймера проверяет кетогенную диету, богатую растительной пищей, в сочетании с постом](https://nootropikler.com/ru/news/plant-rich-ketogenic-fasting-alzheimer-trial): В шестимесячном исследовании с ослеплённой оценкой результатов у 60 человек, получавших стандартное лечение болезни Альцгеймера, средний балл MMSE вырос в группе комбинированного вмешательства и снизился в контрольной группе. Дизайн не позволяет отделить эффект диеты от эффекта голодания. - [Исследование питания с участием ИИ сообщает о когнитивных изменениях у недоедающих жителей домов престарелых](https://nootropikler.com/ru/news/ai-guided-nutrition-long-term-care-cognition): Этапное исследование 108 жителей домов долгосрочного ухода показало, что показатели питания и когнитивные показатели улучшались в основном в группе наиболее недоедающих людей после индивидуальной поддержки питания. Дизайн исследования не может доказать, что сам искусственный интеллект вызвал эти изменения. - [Обзор добавок показывает смешанные когнитивные результаты в исследованиях болезни Альцгеймера и MCI](https://nootropikler.com/ru/news/supplements-mci-alzheimer-network-review-2026): Обзор сети из 29 испытаний выявил смешанные результаты по когнитивным тестам при болезни Альцгеймера и легких когнитивных нарушениях; ни одна добавка существенно не улучшила ADAS-Cog. - [Воспроизведение навыка у мышей сохранялось без гиппокампа](https://nootropikler.com/ru/news/procedural-memory-replay-independent-hippocampus): Во сне обученные мыши воспроизводили последовательности активности дорсального стриатума, связанные с процедурным навыком, даже после повреждения гиппокампа. Такое воспроизведение предсказывало дальнейший успех в задаче; его избирательное нарушение ещё необходимо, чтобы установить причинную роль. - [Иммунные клетки гиппокампа человека изменяются в среднем возрасте](https://nootropikler.com/ru/news/human-hippocampus-immune-cells-shift-in-midlife): Посмертные образцы ткани гиппокампа у 40 взрослых в возрасте от 20 до 95 лет показали сдвиг в популяциях иммунных клеток в среднем возрасте, включая меньшее количество резидентных микроглий и больше воспалительных клеток, похожих на кровяные клетки. - [Онлайн-исследование связало длительный COVID с более низкими показателями рабочей памяти](https://nootropikler.com/ru/news/long-covid-linked-to-lower-working-memory-scores): В поперечном онлайн-исследовании 1 064 человек участники, сообщившие о длительном COVID, показали более низкие результаты краткого теста на зрительную рабочую память; один тест не позволяет диагностировать общее когнитивное нарушение. - [Историческое нормирование сахара связано с последствиями для мозга и психического здоровья в позднем возрасте.](https://nootropikler.com/ru/news/early-life-sugar-rationing-brain-aging): Исследование естественного эксперимента сравнивало взрослых, подвергшихся ограничению сахара в раннем возрасте, с когортами, родившимися позже, и выявило связи с поздним старением мозга и состоянием здоровья; исторический дизайн не может доказать причинно-следственную связь с питанием. - [FDA завершает расследование вспышки сальмонеллеза, связанной с капсулами MOGO моринга](https://nootropikler.com/ru/news/fda-closes-moringa-salmonella-outbreak-investigation): Закрытие FDA от 17 июля зафиксировало 34 случая заболеваний и 11 госпитализаций, связанных с указанными партиями капсул MOGO моринга; отозванные запасы могут оставаться в домах. - [Дендриты гиппокампа обрабатывают сигналы обучения сами по себе.](https://nootropikler.com/ru/news/hippocampal-dendrites-process-learning-signals): Визуализация мембранного потенциала у мышей при навигации показала, что в новой обстановке некоторые сигналы дендритов CA3 гиппокампа изменялись раньше сигналов тела клетки. Это поддерживает локальную обработку в дендритах, но не доказывает улучшения памяти. - [Подсказки при воспроизведении усиливали прирост результатов памяти при повторных тестах](https://nootropikler.com/ru/news/cued-recall-format-increases-repeated-memory-retrieval): В четырех экспериментах ограниченные подсказки по первым буквам давали большие успехи при повторном воспроизведении по сравнению с свободным воспроизведением, но это преимущество исчезало, когда участники могли отвечать в любом порядке. - [Уровни p-tau217 в крови отслеживали риск последующих когнитивных нарушений у пожилых людей](https://nootropikler.com/ru/news/blood-ptau217-predicts-risk-of-cognitive-impairment): Объединённый наблюдательный анализ 2 684 изначально не имеющих нарушений взрослых показал, что более высокий уровень p-tau217 в крови связан с увеличением последующего риска когнитивных нарушений; 10-летние оценки для группы с наивысшими показателями были менее достоверными. - [Исследование LatAm-FINGERS проверяет многодоменную программу для снижения риска когнитивного упадка](https://nootropikler.com/ru/news/latam-fingers-lifestyle-cognition-trial): Крупное рандомизированное исследование в Латинской Америке протестировало физическую активность, диету, когнитивные тренировки и управление сосудистыми рисками у пожилых людей из группы риска; вмешательство дало умеренное преимущество по основному когнитивному результату. - [Агентства США открывают процесс планирования концентрированных продуктов 7-ОН](https://nootropikler.com/ru/news/dea-begins-7-oh-scheduling-process): Обновление FDA от 13 июля описывало предложение о временном включении в расписание концентрированных 7-OH и синтетических производных, отличая этот процесс от окончательного постановления. - [Ceperognastat не замедлил клиническое прогрессирование в исследовании болезни Альцгеймера](https://nootropikler.com/ru/news/ceperognastat-alzheimers-phase2-trial-no-clinical-benefit): В исследовании фазы 2 с участием 327 человек ceperognastat не замедлил в клинически значимой степени раннюю симптоматическую болезнь Альцгеймера за 100 недель; при более высокой дозе расчётное прогрессирование было быстрее, чем при плацебо. - [Случайные звуки во время дневного сна нарушили медленные волны и воспроизведение воспоминаний](https://nootropikler.com/ru/news/random-sleep-audio-disrupted-slow-waves-and-recall): В исследовании двух дневных сессий сна с участием 20 здоровых мужчин случайные звуки сократили длительность медленноволнового сна и ухудшили воспроизведение ассоциаций между фигурами, но не вербальную или процедурную память; статья вышла 25 июня, а Фрайбург сообщил о ней 9 июля. - [Шум во время сна нарушал сигналы памяти гиппокампа у крыс](https://nootropikler.com/ru/news/sleep-noise-interrupts-hippocampal-memory-consolidation-in-rats): У спящих крыс кратковременные звуки, синхронизированные с остроконечными волнами гиппокампа, снижали активность волн и нарушали удержание информации в одной из задач на память, тогда как эффекты зависели от задачи. - [Региональная модель возраста мозга связала маркер тау в крови с когнитивными функциями](https://nootropikler.com/ru/news/regional-brain-age-pattern-links-tau-marker-and-cognition): Кросс-секционное исследование 71 пожилого человека выявило косвенную связь между p-tau217 и когнитивными функциями через одну схему возраста мозга по МРТ; прямые и общие связи были незначимыми. - [Два МРТ-маркера были связаны с когнитивным прогрессированием на ранней стадии РС](https://nootropikler.com/ru/news/multiple-sclerosis-mri-markers-cognitive-progression): У 87 человек с ранним ремиттирующем рассеянным склерозом МРТ-маркеры при постановке диагноза были связаны с последующим снижением когнитивных функций, независимо от рецидивов или активности по данным МРТ. - [Обогащённая кукурузная мука не улучшила показатели когнитивных способностей в исследовании, проведённом среди эфиопских девушек-подростков](https://nootropikler.com/ru/news/vitamin-fortified-corn-flour-teen-cognition-ethiopia): Шестимесячное исследование 472 девочек не показало значительной когнитивной пользы от кукурузной муки, обогащенной фолатом и витамином B12; различие в языковом тесте появилось во вторичном анализе по статусу задержки роста. - [Большее потребление ультраобработанных продуктов связано с ухудшением внимания в австралийской когорте](https://nootropikler.com/ru/news/ultra-processed-foods-attention-apoe4): Кросс-секционное исследование 2 192 взрослых австралийцев показало, что большая доля ультра-обработанных продуктов связана с немного более низким уровнем внимания, но не обнаружило явной связи с памятью и не может установить причинно-следственную зависимость. - [FDA указывает на заявления о болезни Альцгеймера и тревожности на сайте одного продавца зелёного чая](https://nootropikler.com/ru/news/fda-warns-green-tea-seller-over-disease-treatment-claims): Письмо FDA от 2 июля оспаривало заявления продавца о болезни Альцгеймера, болезни Паркинсона и тревожности в отношении зеленого чая; действие касается маркетинга и одобрения препаратов, а не нового испытания эффективности. - [Показатели крови при болезни Альцгеймера в среднем возрасте связаны с когнитивными результатами в когорте](https://nootropikler.com/ru/news/nih-midlife-alzheimer-biomarkers-cognition): Отчет NIH за июль подчеркнул исследование когорты CARDIA, связывающее маркеры амилоида и тау-белка в крови с когнитивными различиями в среднем возрасте; результаты носят наблюдательный характер. - [Кетоны, полученные из MCT, изучались как альтернативный источник энергии для мозга во время гипогликемии.](https://nootropikler.com/ru/news/mct-ketones-hypoglycemia-working-memory-t1d): Небольшое исследование на людях показало, что четырёхнедельная диета с триглицеридами со средней длиной цепи (MCT) была связана с повышением точности рабочей памяти при индуцированной гипогликемии у людей с диабетом 1 типа; время реакции не улучшилось. - [Тета-волны гиппокампа отслеживали запомненные цели у крыс.](https://nootropikler.com/ru/news/goal-directed-hippocampal-theta-navigation): У крыс, перемещающихся по открытой арене, зависящие от обучения тета-последовательности в гиппокампе предсказывали маршруты к запомненным целям и координировались с активностью префронтальной коры. Это выявляет потенциальную цепь планирования, но не доказывает, что эти последовательности вызывают навигацию. - [Nootropik News — أخبار النوتروبيكس وعلوم الأعصاب](https://nootropikler.com/ar/news) - [Nootropik News — أخبار النوتروبيكس وعلوم الأعصاب — صفحة 10](https://nootropikler.com/ar/news/page/10) - [Nootropik News — أخبار النوتروبيكس وعلوم الأعصاب — صفحة 11](https://nootropikler.com/ar/news/page/11) - [Nootropik News — أخبار النوتروبيكس وعلوم الأعصاب — صفحة 2](https://nootropikler.com/ar/news/page/2) - [Nootropik News — أخبار النوتروبيكس وعلوم الأعصاب — صفحة 3](https://nootropikler.com/ar/news/page/3) - [Nootropik News — أخبار النوتروبيكس وعلوم الأعصاب — صفحة 4](https://nootropikler.com/ar/news/page/4) - [Nootropik News — أخبار النوتروبيكس وعلوم الأعصاب — صفحة 5](https://nootropikler.com/ar/news/page/5) - [Nootropik News — أخبار النوتروبيكس وعلوم الأعصاب — صفحة 6](https://nootropikler.com/ar/news/page/6) - [Nootropik News — أخبار النوتروبيكس وعلوم الأعصاب — صفحة 7](https://nootropikler.com/ar/news/page/7) - 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