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Dernières en Neurosciences & IHM rss

NeuroNews · 17h#

3D Genome Atlas Reveals Early Roots of Schizophrenia

How does the human brain wire its reward and motor centers before birth? Using 3D genome sequencing across nearly 287,000 brain cells, UCLA scientists mapped the developing basal ganglia from mid-pregnancy to infancy, pinpointing how spiny…

NeuroNews · 17h#

Autism Shapes How Words vs. Numbers Drive Risk Decisions

Words vs. numbers: A University of Tokyo study reveals that adults with autism spectrum disorder are strongly influenced by positive or negative verbal framing—such as "possible" versus "unlikely"—rather than underlying percentages when…

NeuroNews · 18h#

Blood-Brain Barrier Protein Atlas Unlocks Alzheimer’s

Does Alzheimer's start outside the brain? Gladstone Institutes researchers mapped the first atlas of 92 blood proteins that cross the blood-brain barrier, discovering that the barrier shuts down the import of protective liver proteins…

NeuroNews · 1j#

Brain Moves Its Touch Center to Keep Feeling Sensation

Why does artificial touch fade over time? Penn State engineers used fNIRS brain imaging to solve sensory habituation during transcutaneous nerve stimulation, discovering a 5-second pulse protocol that maintains a stable sense of touch…

NeuroNews · 1j#

Why Nervous System Hyperarousal Keeps Jolting You Awake

Ever jolt awake with a racing heart just as you drift off? A study in PLOS Mental Health reveals that frequent hypnic jerks—or sleep starts—are not simple muscle twitches, but markers of anxiety, insomnia severity, and nervous system…

NeuroNews · 1j#

Multiple Sclerosis Atrophy Spreads From High-Stress Neural Hubs

Why does brain volume loss in multiple sclerosis follow distinct patterns? An MRI study of 2,187 patients reveals that atrophy originates in metabolically exhausted network hubs—including the thalamus and sensorimotor cortices—spreading…

NeuroNews · 1j#

Daytime Sleep Waves in Parkinson’s Linked to Hallucinations

When sleep invades wakefulness: An EEG study of 84 Parkinson’s patients reveals that sleep-like slow brain waves intrude into daytime consciousness, directly tracking with hallucinations and cognitive decline while offering a potential…

ScienceDaily Brain · 2j#

Obesity linked to up to 27% lower risk of death in dementia

A surprising study of more than 4,500 older adults found that people who were overweight or obese when diagnosed with dementia had a 16% to 27% lower risk of death than those at a normal weight. Researchers suspect that extra energy and…

Frontiers Neuro · 2j#

Orexinergic descending modulation of pain and itch

Descending pain control dynamically regulates nociceptive transmission through brainstem and spinal circuits according to behavioral and physiological demands. Within this system, accumulating evidence identifies hypothalamic orexin…

ScienceDaily Brain · 2j#

Even occasional marijuana use linked to 40% higher odds of stroke

New research involving more than 440,000 Americans links cannabis use to increased cardiovascular risk, with occasional users showing 40% higher odds of reporting a history of stroke. The findings suggest that even infrequent marijuana use…

NeuroNews · 2j#

CASS4 Gene Directs Microglia to Contain Alzheimer’s Plaques

Meet the brain's trash compactor: UVA Health researchers discovered that the CASS4 risk gene directs microglia to tightly pack and contain toxic amyloid plaques, proving Alzheimer's risk operates directly through immune defenses rather…

NeuroNews · 2j#

Early Infections Prime the Brain for Alzheimer’s

Can an infection in youth seed Alzheimer's in old age? FAU and TUM scientists investigate a "cellular long-term memory" in neurons and microglia, where damaged long-lived RNA molecules leave brain cells primed for neurodegenerative…

NeuroNews · 2j#

Pregnancy Cannabis Abuse Triples Postpartum Psychosis Risk

Is cannabis during pregnancy truly risk-free? A UC Merced study of over 2 million births in the Annals of Epidemiology finds women with cannabis use disorder face triple the risk of postpartum psychiatric emergencies, alongside a 40% surge…

NeuroNews · 2j#

Stem Cells Recreate the Human Placenta’s Hidden First Steps

How does the human placenta form in the earliest, hidden days of pregnancy? Columbia University researchers created a 3D stem-cell model that self-assembles into placental tissue and lacunae, revealing the molecular triggers behind…

NeuroNews · 2j#

Study Tracks 3,000 Real-World Psychedelic Journeys

Most psychedelic journeys don't happen in hospital clinics. Backed by $8.5 million in ARPA-H funding, UCSF neuroscientists led by Robin Carhart-Harris launched CANOPY—a global project tracking 3,000 real-world psychedelic users with remote…

ScienceDaily Brain · 3j#

Alzheimer’s may have early warning signs outside the brain

A surprising discovery suggests that some early signs of Alzheimer’s disease may begin outside the brain. Using miniature laboratory systems made from human cells, scientists found that genetic mutations associated with inherited…

ScienceDaily Brain · 3j#

Scientists finally discover why we learn to love bitter coffee

Scientists have uncovered a hidden gut-to-brain dopamine pathway that helps explain why bitter coffee and other initially unpleasant flavors can become favorites over time. The discovery reveals how the brain learns to crave certain foods…

NeuroNews · 3j#

Water Fluoridation Does Not Impair Brain Function

Summary: A population-based epidemiological investigation from Trinity College Dublin finds no evidence connecting lifetime exposure to fluoridated drinking water with cognitive decline or dementia risk in older adults. Published in the…

NeuroNews · 3j#

How Fleeting Moments With Strangers Combat Loneliness

Can a warm smile from a stranger keep loneliness at bay? University of Georgia sociologist Joseph Hermanowicz coins the term "evanescent interactions" to explain how fleeting, empathetic micro-connections validate human existence and…

NeuroNews · 3j#

Low-Frequency Theta Waves Organize Frontal Cortex Cognition

How does the brain coordinate complex thought across distant regions? MIT researchers discovered that low-frequency theta waves act as the frontal cortex's master air traffic control, synchronizing neural spikes and orchestrating beta and…

NeuroNews · 3j#

How Primates Stitch Visual Meaning Across Eye Movements

How do humans and monkeys find continuous meaning in a movie? City College of New York researchers tracked eye movements and neural firing, discovering a rapid "semantic novelty signal" that bridges visual glimpses to predict scene meaning.

ScienceDaily Brain · 4j#

A simple supplement may help clear brain fog after cancer

A surprising new study from UCLA suggests that a naturally occurring molecule could help breast cancer survivors overcome the frustrating brain fog and exhaustion that can linger long after treatment ends. Researchers found that women…

ScienceDaily Brain · 5j#

Scientists discover a hidden warning sign of cannabis addiction

A study of more than 17,700 US adults found that people who use cannabis in multiple forms have dramatically higher rates of daily consumption and addiction symptoms than those who stick primarily to one method. Nearly 67% of those who…

ScienceDaily Brain · 6j#

Magic mushrooms rewire the brain in a way scientists didn't expect

A surprising discovery reveals how psilocybin, the active compound in magic mushrooms, rapidly reshapes the brain by creating new neural connections and strengthening them. Researchers found that the drug behaves differently in healthy and…

NeuroNews · 6j#

Looksmaxxing Trend Poses Health Risks for Young Men

Can the pursuit of a chiseled jawline lead to self-harm? A commentary in the Journal of Adolescent Health warns that the viral "looksmaxxing" trend is driving adolescent boys toward body dysmorphia, unregulated steroids, extreme…

NeuroNews · 6j#

How “Pink Noise” in Conversation Makes Chats Enjoyable

What makes a conversation truly click? Researchers discovered that enjoyable dialogues follow a mathematical rhythm called "pink noise", an organic ebb and flow of semantic alignment and divergence that predicts chemistry from speed dates…

NeuroNews · 6j#

Can Obesity Drugs Protect the Brain?

Can blockbuster weight-loss medications save your memory? A review in Science by researchers at the Universities of Copenhagen and Gothenburg dissects how GLP-1 drugs affect cognitive pathways, evaluating the boundary between systemic…