Neural Mechanisms Underlying Approach and Avoidance Tendencies in Alcohol Use: An Electrophysiological Investigation

Background: A growing body of research highlights the differential role of approach and avoidance tendencies toward alcohol cues in the development and maintenance of harmful drinking behavior. Some individuals involved in alcohol consumption show an automatic approach towards alcohol-related stimuli, whereas others demonstrate avoidance, suggesting the need to understand the neurocognitive mechanisms underlying these automatic tendencies. Methods: The current study employed an Alcohol Approach-Avoidance Task (A-AAT) with electroencephalography (EEG) to investigate neural responses among individuals with alcohol approach and avoidance tendencies. Alcohol group participants were categorized into approach and avoidance subgroups based on their behavioral tendencies following A-AAT administration. Findings: Results revealed significant attenuation in P3 and FN400 amplitudes at frontal and parietal sites, respectively, in the alcohol-approach participants compared to both the alcohol-avoidance and non-alcohol participants. These findings suggest weakened controlled cue processing and impaired stimulus-response conflict resolution in individuals with stronger approach tendencies. Notably, right prefrontal activity exhibited prominent differences between the approach and avoidance groups, highlighting its potential role in regulating automatic alcohol-related responses. Implications: The identified ERP markers provide clinical utility for assessing alcohol approach tendencies and monitoring the progress of intervention. Findings further emphasize the importance of individually tailored targeted interventions aimed at reducing harmful alcohol consumption behavior by altering alcohol approach tendencies.