New Study Uncovers Link Between Stress and Addiction

Texas A&M researchers identify direct brain pathway connecting stress response to habit formation and decision-making.

Mar. 31, 2026 at 10:39am

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A new study from Texas A&M University has uncovered a direct connection in the brain between the stress response system and the region responsible for habits and decision-making. The research shows how alcohol disrupts this natural stress-response system, making it harder for the brain to adapt or make good decisions during stressful situations.

Why it matters

This discovery helps explain several well-known features of addiction, including why stress is a powerful trigger for relapse, why addiction involves rigid and compulsive behaviors, and why withdrawal can make stress feel worse. Understanding this precise biological link between stress and addiction-related behaviors could guide the development of future treatments to help people build resilience against addiction.

The details

The study, led by Dr. Jun Wang, professor at the Texas A&M University College of Medicine, found a pathway that connects the brain's stress centers (the central amygdala and bed nucleus of the stria terminalis) to the dorsal striatum, the region that governs habits and actions. This 'direct line of communication' allows the brain's main stress signal, corticotropin-releasing factor (CRF), to reach specialized 'traffic control' cells called cholinergic interneurons (CINs) in the dorsal striatum. Normally, CRF activation of CINs helps the brain stay flexible and make better decisions during stress. However, the researchers found that alcohol disrupts this system, weakening CRF's ability to activate CINs and slowing the activity of these cells on its own.

  • The study was published in the journal eLife on March 31, 2026.

The players

Dr. Jun Wang

Professor in the Department of Neuroscience and Experimental Therapeutics at the Texas A&M University College of Medicine and the senior author of the study.

Texas A&M University

The university where the research was conducted.

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What they’re saying

“What we've identified is a direct line of communication between the brain's stress centers and the region that governs habits and actions, a connection that wasn't previously understood well.”

— Dr. Jun Wang, Professor, Texas A&M University College of Medicine

“Under normal conditions, this stress signal actually helps the brain stay flexible, not rigid. It helps us pause, think and make better decisions, especially when something stressful is happening.”

— Dr. Jun Wang, Professor, Texas A&M University College of Medicine

“Alcohol essentially cuts the line of communication. When that happens, the brain loses some of its ability to respond to stress in a healthy way. This may push a person toward automatic or habitual behaviors, like drinking.”

— Dr. Jun Wang, Professor, Texas A&M University College of Medicine

What’s next

The researchers say the findings may guide the development of future treatments that aim to strengthen the activity of the cholinergic interneurons, support CRF signaling during withdrawal, and protect the stress-response circuit from alcohol's effects.

The takeaway

This study provides a clearer biological understanding of the link between stress and addiction-related behaviors, offering insights that could lead to new therapies to help people build resilience against the powerful influence of stress on unhealthy habits.