Reduced anterior prefrontal cortex activation in young binge drinkers during a visual working memory task

Area of Science:

• Neuroscience
• Cognitive Psychology
• Addiction Research

Background:

• Working memory (WM) is crucial for cognitive function and is known to be affected by chronic alcohol use.
• The adolescent brain, especially the hippocampus and prefrontal cortex (PFC), is particularly vulnerable to alcohol's neurotoxic effects.
• Binge drinking, common among university students, involves intermittent high alcohol consumption.

Purpose of the Study:

• To investigate visual working memory and its neural underpinnings in young university binge drinkers.
• To compare brain activity between binge drinkers and non-drinking controls using advanced neuroimaging techniques.

Main Methods:

• A sample of 42 binge drinkers and 53 controls completed an identical pairs continuous performance task (IP-CPT).
• Combined event-related potential (ERP) and exact low-resolution brain electromagnetic tomography (eLORETA) were used to analyze neural correlates.
• Performance and brain activity differences between groups were assessed.

Main Results:

• Binge drinkers exhibited a smaller late positive component (LPC) during the task compared to controls.
• Hypoactivation in the right anterior prefrontal cortex (aPFC) was observed in binge drinkers for matching stimuli.
• Despite adequate task performance, underlying neural differences were detected.

Conclusions:

• Binge drinking is associated with functional alterations in visual working memory recognition processes.
• Impaired prefrontal cortex function may manifest at an early age in individuals engaging in binge drinking.
• These findings highlight the neurobiological impact of early-onset binge drinking on cognitive functions.