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Health

·December 18, 2025·7 min read

Depression Quietly Damages the Heart Through Stress Circuits

Depression and anxiety may heighten cardiovascular disease risk through chronic stress pathways in the brain and body. In a large analysis of more than 85,000 adults, those with depression or anxiety — especially both — were significantly more likely to experience heart attack, stroke or heart failure.

Featured Neurology Neuroscience

·December 17, 2025·5 min read

Dopamine Acts as a Movement Support System, Not a Speed Controller

Dopamine may not control the force or speed of movements as long believed. Instead, it appears to function as a foundational chemical that enables movement in the first place.

This shows AI representations of brain scans.

Neuroscience

·December 16, 2025·5 min read

fMRI Signals Often Misread Neural Activity

fMRI signals don’t always match the brain’s true activity levels, overturning a core assumption used in tens of thousands of studies. In about 40% of cases, an increased fMRI signal appeared in regions where neural activity was actually reduced, while decreased signals sometimes showed up in areas with heightened activity.

Brain Cancer Featured Neurology Neuroscience

·December 15, 2025·5 min read

Cancer Disrupts the Brain’s Internal Clock

Breast cancer can rapidly derail the brain’s day-night regulation of stress hormones, even before tumors are detectable. In mice, the disease flattens normal corticosterone rhythms by altering hypothalamic neuron activity, which may worsen outcomes and mimic symptoms often seen in cancer patients, such as insomnia and anxiety.

Featured Neurology Neuroscience

·December 15, 2025·7 min read

Tiny Gut Imposters Could Be Driving Multiple Sclerosis

New research reveals that when gut bacteria closely resemble the myelin sheath that protects nerve fibers, the immune system can become confused and attack both — accelerating multiple sclerosis. In mouse experiments, bacteria engineered to mimic myelin triggered faster disease progression by activating aggressive immune cells that infiltrated the nervous system.

This shows the outline of a person and foods.

Featured Neuroscience

·December 13, 2025·6 min read

Blood Sugar Patterns Strongly Linked to Sleep Quality

Blood sugar patterns and dietary choices play a significant role in how well adults sleep. Individuals with diabetes were more likely to experience sleep disorders, poor sleep quality, and irregular sleep duration, with people who have prediabetes showing similar but milder trends.

Featured Neurology Neuroscience

·December 12, 2025·7 min read

Blood Transfusions May Accelerate Alzheimer’s Progression

New research shows that blood from older animals can speed up Alzheimer’s-related changes in the brain, while young blood may slow them down. In a long-term experiment, mice engineered to develop Alzheimer’s symptoms received weekly blood infusions from either young or old donors.

Featured Neuroscience Psychology

·December 11, 2025·7 min read

Stress Levels Predict Cannabis Use

New research shows that rats with naturally higher baseline stress hormone levels are significantly more likely to self-administer cannabis vapor. Over several weeks, rats were allowed to nose-poke for cannabis, and those with elevated corticosterone displayed the strongest drug-seeking behavior.

Neuroscience

·December 10, 2025·7 min read

Anti-Inflammatory Treatments Show Promise for Depression

A new analysis shows that anti-inflammatory medications may help reduce symptoms for a subset of people with depression who also have chronic, low-grade inflammation. By reviewing randomized controlled trials that specifically enrolled individuals with elevated inflammatory markers, researchers found that anti-inflammatory treatments significantly reduced both overall depressive symptoms and anhedonia.

Featured Neurology Neuroscience

·December 10, 2025·8 min read

AI Turns Simple EEG Scans Into Accurate Dementia Detectors

New research shows that deep learning can use EEG signals to distinguish Alzheimer’s disease from frontotemporal dementia with high accuracy. By analyzing both the timing and frequency of brain activity, the model uncovered distinct patterns: broader disruption across multiple regions in Alzheimer’s and more localized frontal and temporal changes in frontotemporal dementia.

This shows DNA and other cellular factors associated with ASD.

Autism Featured Genetics Neuroscience

·December 10, 2025·9 min read

Many Autism Cases May Be Preventable

A new study proposes that autism arises when genetic vulnerability, an early environmental trigger, and prolonged activation of the cellular stress response align during critical developmental windows. This “three-hit” metabolic model reframes autism as a disorder of disrupted cellular communication and energy metabolism rather than an inevitable genetic outcome.

This shows a map and the overlay of a person.

Featured Neuroscience

·December 9, 2025·6 min read

Insufficient Sleep Strongly Predicts Shorter Life Expectancy

A new nationwide analysis shows that getting fewer than seven hours of sleep a night is one of the strongest predictors of shorter life expectancy across U.S. counties. Sleep sufficiency outperformed other behavioral factors—including diet, exercise, and loneliness—with only smoking showing a stronger association.

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