Stress and addiction are among the most closely interconnected processes in psychoneurobiology. Numerous studies indicate that stress often acts as a trigger for the development and relapse of alcohol and other types of addiction. A study published in 2026 further deepened our understanding of this relationship and identified a specific neural mechanism that directly links stress to addiction.
This research was conducted at Texas A&M University, in the Department of Neuroscience and Experimental Therapeutics, under the leadership of Professor Jun Wang. The findings were published in the scientific journal eLife.
Within the framework of the study, researchers discovered a previously unknown “direct neural pathway” that connects brain regions responsible for stress with those that control habits and behavioral decision-making. The primary stress centers—the central amygdala (CeA) and the bed nucleus of the stria terminalis (BNST)—send signals to a part of the brain known as the dorsal striatum. This region plays a crucial role in the formation of habits and the regulation of automatic behaviors.
The transmission of stress signals occurs via a chemical messenger called corticotropin-releasing factor (CRF). This molecule acts on specialized neurons known as cholinergic interneurons (CINs), which function as regulators and control the brain’s response to stress. Under normal conditions, this system ensures behavioral flexibility, helping an individual analyze situations and make appropriate decisions.
One of the most important findings of the study concerns the effect of alcohol on this system. It was found that alcohol significantly weakens the action of CRF, thereby disrupting the adaptive response to stress. As a result, the brain partially loses its ability to “pause and evaluate” situations, which increases the likelihood of automatic, habitual behaviors—such as alcohol consumption during stressful states.
This mechanism explains why stress is one of the main risk factors for relapse in individuals with addiction. When this neural system is impaired, a person has difficulty adapting and often returns to already established harmful habits.
In conclusion, this study represents an important step forward in understanding the neurobiology of addiction. It not only explains the close relationship between stress and addiction but also provides a foundation for the development of new therapeutic approaches aimed at restoring the function of this specific neural pathway.
https://neurosciencenews.com/stress-addiction-brain-pathway-30429/
