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·December 16, 2025·5 min read

Social Isolation Directly Speeds Up Cognitive Decline

Social isolation has a direct causal impact on how quickly cognitive function declines in later life, independent of whether someone feels lonely. By analyzing more than 137,000 cognitive tests from over 30,000 older adults, the study found that reduced social contact consistently predicted faster decline across every demographic group.

Featured Neuroscience

·December 16, 2025·6 min read

Two Dopamine Neuron Subtypes Process Smell in Different Ways

Closely related dopamine-releasing neurons in the olfactory bulb behave in fundamentally different ways depending on their physical structure. One subtype releases neurotransmitters from dendrites instead of axons—an unusual mechanism that allows the cells to act locally and even self-inhibit.

Featured Neuroscience

·December 16, 2025·9 min read

Why Consciousness Evolved

New work explores why consciousness evolved and what observing birds can teach us about its biological purpose. The findings outline three distinct forms of consciousness—basic arousal, general alertness, and reflexive self-awareness—each providing unique adaptive advantages.

Featured Neuroscience

·December 15, 2025·4 min read

Exercise Supercharges Hormone Transport to the Brain

Physical exercise triggers extracellular vesicles (EVs)—tiny particles in the blood—to act as temporary transport shuttles for key hormone precursors. During vigorous exercise, levels of the hormone precursor POMC attaching to EVs increase fourfold, suggesting a newly uncovered mechanism for how stress, energy balance, and mood may shift after movement.

Featured Neuroscience

·December 15, 2025·5 min read

Neurons Use a Fast Structural Signal to Stabilize Communication

Neurons can rapidly rebalance their communication using a structural signal rather than electrical activity, overturning long-held assumptions about how synapses maintain stability. When receptors on the receiving side of a synapse were blocked, they physically reorganized, triggering the sending neuron to increase neurotransmitter release and preserve steady signaling.

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 Neuroscience Psychology

·December 15, 2025·7 min read

Second-Hand Gifts Are Becoming the New Status Symbol

New research shows that buying second-hand gifts is typically a thoughtful, intentional decision rather than an impulsive one. Consumers are motivated by fair prices, the thrill of finding rare items, and the desire to shop sustainably. Survey results from a major online marketplace reveal that intentions often translate directly into purchases—especially for items that are easy to evaluate, such as books.

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.

Featured Neuroscience Psychology

·December 14, 2025·5 min read

Study Challenges Myths About Self-Centeredness

A large international study of more than 45,000 people shows that narcissism is a universal personality trait—not one concentrated in any single country. Although nations differed somewhat, the five highest-scoring countries were Germany, Iraq, China, Nepal, and South Korea, with the United States ranking 16th.

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 Neuroscience Psychology

·December 12, 2025·6 min read

AI Brain Model Reveals How Fear Works in Real Life

Researchers have developed an AI-driven brain model that can track fear as it unfolds in real-world situations, offering a major shift from traditional lab-based approaches. Classic fear studies often rely on static images, but these do not reflect how the brain processes fear in dynamic contexts.

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.

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