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·December 30, 2024·8 min read

Early Substance Use Linked to Brain Structure Differences in Teens

A study of nearly 10,000 adolescents found that those who initiated substance use before age 15 exhibited distinct differences in brain structures compared to their peers. Many of these differences were present before substance use, suggesting a role in predisposing factors like genetics and environment.

Featured Neuroscience Psychology

·December 27, 2024·5 min read

The Personality Gap Between Singles and the Partnered

Lifelong singles score lower on life satisfaction and show distinct personality traits compared to those in long-term relationships. Using data from 77,000 Europeans aged 50+, researchers observed that lifelong singles are less extroverted, conscientious, and open to new experiences. While single women report higher satisfaction than single men, societal expectations about marriage further impact satisfaction levels in cultures with high marriage rates.

Featured Neuroscience

·December 27, 2024·5 min read

Classical vs. Operant Conditioning: The Brain’s Memory Tug-of-War

Classical and operant conditioning compete in the brain, preventing simultaneous learning of conflicting actions. Using fruit flies, researchers demonstrated that attempting to teach both types of learning simultaneously results in confusion and no clear memory formation.

Featured Neuroscience Psychology

·December 27, 2024·4 min read

Oxytocin Influences Social Behavior and Emotional Response

New research reveals how oxytocin profoundly influences social behavior and emotional responses in the brain. Animal models have shown how this hormone impacts social fear and how chronic stress or early life experiences shape behavioral patterns.

Autism Featured Genetics Neuroscience

·December 27, 2024·5 min read

Lithium Restores Brain Function and Behavior in Autism

Lithium, a drug widely used for bipolar disorder, may also treat autism spectrum disorder (ASD), according to new research. The study found that lithium restored brain function and reduced behavioral symptoms in mice with Dyrk1a gene mutations, a known ASD risk factor.

Featured Neuroscience

·December 23, 2024·5 min read

Mapping Brain-to-Spinal Cord Pathways for Motor Control

Researchers have created a 3D atlas mapping brain regions that connect to V1 spinal interneurons, which shape motor output. By using a genetically modified rabies virus, they pinpointed connections from the brain to these diverse "switchboard operator" cells in the spinal cord.

Featured Genetics Neuroscience

·December 21, 2024·8 min read

Rare Brain Cells Offer Clues to Aging and Rejuvenation

A study reveals how brain cell interactions influence aging, showing that rare cell types either accelerate or slow brain aging. Neural stem cells provide a rejuvenating effect on neighboring cells, while T cells drive aging through inflammation.

Featured Neuroscience

·December 20, 2024·5 min read

Structural Sexism Tied to Faster Memory Decline in Older Women

Women born in states with higher structural sexism experience faster memory decline later in life, with effects equivalent to nine years of cognitive aging. Structural sexism encompasses societal inequities like unequal labor force participation and underrepresentation in government, which create systemic barriers to health. The impact is particularly pronounced among Black women, highlighting the intersection of sexism and racism.

Featured Neurology Neuroscience

·December 20, 2024·8 min read

Chronic Gut Virus May Play a Role in Alzheimer’s Development

Researchers have linked chronic intestinal infections caused by cytomegalovirus (HCMV) to a unique subtype of Alzheimer’s disease. The virus may travel from the gut to the brain via the vagus nerve, altering immune responses and contributing to hallmark Alzheimer’s changes like amyloid plaques and tau tangles. While HCMV infection is common and typically harmless, this study found that it may cause chronic brain inflammation in certain individuals.

Featured Neurology Neuroscience

·December 20, 2024·5 min read

AI Estimates Brain Age, Links Lifestyle to Cognitive Health

Researchers used AI to analyze brain images from 70-year-olds, estimating their biological brain age and uncovering connections to lifestyle and health factors. Diabetes, inflammation, and high glucose levels were linked to older-looking brains, while regular exercise and healthy habits were associated with younger-looking brains.

This shows food items shaped into a brain.

Featured Neuroscience

·December 20, 2024·5 min read

Serotonin, GABA, and Dopamine Drive Hunger and Feeding

A new study has revealed how brain circuits and neurotransmitters regulate meal initiation, offering insights into obesity management. Researchers identified serotonin neurons in the midbrain's dorsal Raphe nucleus (DRN) as key players, inhibited by GABA and dopamine when hunger strikes.

Featured Neuroscience

·December 20, 2024·4 min read

How Alcohol Impairs the Brain’s Ability to Adapt and Learn

Alcohol use disorder (AUD) disrupts cognitive flexibility, crucial for learning and adapting to change. New research reveals that chronic alcohol exposure alters the firing patterns of cholinergic interneurons (CINs), key neurons in the brain’s striatum that regulate dopamine and influence reward-driven learning.