Cognition

SuperAgers Kept Youthful Memory With Preserved Cortex and Larger Entorhinal Neurons

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SuperAgers Reveal Biology of Preserved Memory

SuperAgers Reveal Brain Biology of Preserved Memory TL;DR: Octogenarians who recall words like 50-year-olds carry a distinct brain profile: preserved cortical volume, a cingulate cortex thicker than younger adults, larger entorhinal neurons, fewer inflammatory microglia, and more von Economo neurons — the biology is real, not just motivational. Key Findings Age-80 memory matched 50-to-60-year-olds: SuperAgers …

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Autism Severity Tracked Frontoparietal-DMN Connectivity Across ADHD and Autism

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Autism Severity Showed Up in a Shared ADHD Connectome

Autism Severity Showed Up in a Shared ADHD Connectome TL;DR: In 166 verbal children diagnosed with either autism or ADHD without autism, stronger resting-state coupling between the left middle frontal gyrus and posterior cingulate cortex tracked clinician-rated autism severity across both diagnoses, while ADHD symptom ratings showed no comparable brain-wide signal. Key Findings 166 low-motion …

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Digital Avatar Faces Appear Believable When Eyes Match Emotions

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Digital Faces Looked More Believable When Their Eyes Matched the Emotion

Digital Faces Looked More Believable When Their Eyes Matched the Emotion TL;DR: A virtual smile or glare looked most believable with direct eye contact, while sadness became more believable when the digital face looked downward. Key Findings Direct gaze boosted approach emotions: Happy and angry avatar expressions looked most authentic when the eyes met the …

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Lifetime Cognitive Enrichment Delayed Alzheimer’s Dementia

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Lifetime Cognitive Enrichment Delayed Alzheimer's Dementia

Lifetime Cognitive Enrichment Delayed Alzheimer’s Dementia TL;DR: In 1,939 Rush Memory and Aging Project participants, higher lifetime cognitive enrichment was linked to 38% lower Alzheimer’s dementia hazard and about 5 years later dementia onset. Key Findings 1,939 dementia-free adults: Participants were older adults from Northeastern Illinois in the Rush Memory and Aging Project, with a …

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L-DOPA Partly Rescued Entorhinal Memory Failure in Alzheimer’s Mice

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Dopamine Disruption May Start Alzheimer's Memory Failure

Dopamine Disruption May Start Alzheimer’s Memory Failure TL;DR: In an Alzheimer’s mouse model, early memory failure tracked a broken dopamine signal into the lateral entorhinal cortex, and both optogenetic dopamine reactivation and L-DOPA partially restored learning. Key Findings Early learning slipped: Young APP knock-in mice reached 78.6% correct trials in the final learning block, compared …

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Sharper Cognitive Precision Predicted 40 Extra Minutes of Goal-Directed Work

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Daily Cognitive Precision Predicted Goal Follow-Through

Daily Cognitive Precision Predicted Goal Follow-Through TL;DR: Sharper-than-usual cognitive days predicted same-day follow-through: a one-standard-deviation jump in precision translated to roughly 40 extra minutes of goal-directed work. Key Findings Sharper days predicted follow-through: The study followed university students intensively rather than comparing high- and low-performing people once. 9,248 daily time points: Microtasks measured fluctuations in …

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Cannabis via Vaporized THC (20-40 mg) Caused Memory Impairment

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Cannabis Did Not Just Blur Word Lists. It Hit Everyday Memory Too

Cannabis Did Not Just Blur Word Lists. It Hit Everyday Memory Too TL;DR: A randomized vaporized-THC trial found broad acute memory impairment, including false memories, prospective memory, source memory, and temporal order memory, with no meaningful dose split between 20 and 40 mg. Key Findings 120 regular cannabis users randomized: Participants vaporized placebo cannabis, 20 …

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Broken Blood Vessels May Drive Alzheimer’s Decline

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Broken Blood Vessels May Drive Alzheimer’s Decline TL;DR: A new study reveals that impaired cerebrovascular function—the brain’s ability to regulate blood flow—correlates strongly with Alzheimer’s symptoms, offering a potential non-invasive way to detect early cognitive decline. Alzheimer’s disease has long been framed as a problem of toxic protein accumulation: amyloid plaques and tau tangles strangling …

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How FP802 Targets the NMDAR/TRPM4 Death Complex to Reverse Alzheimer’s

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The Death Complex Fueling Alzheimer’s (And How to Stop It) TL;DR: Researchers discovered a toxic interaction between two brain proteins—NMDAR and TRPM4—that drives neurodegeneration in Alzheimer’s disease, and a small molecule called FP802 that blocks this “death complex” and prevents cognitive decline in mice. Alzheimer’s disease devastates the brain through multiple pathways, but the exact …

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How the Human Brain Stores Memory: Content vs. Context Neurons

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How the Brain Separates What We Remember from Why We Remember It TL;DR: The brain stores content (what you remember) and context (when/where) in separate neural populations linked by real-time coordination, not pre-wired conjunctive cells—a design that trades speed for flexibility, allowing you to recognize a friend’s face across any setting or apply a principle …

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