Preparing to approach or avoid alcohol: EEG correlates, and acute alcohol effects

Area of Science:

• Cognitive Neuroscience
• Neuroscience of Addiction

Background:

• Approach bias is a cognitive-motivational process linked to alcohol use problems.
• This bias involves a strong connection between perception and action, with response preparation potentially influencing behavior.

Purpose of the Study:

• To investigate how alcohol approach bias affects response preparation.
• To examine the impact of acute alcohol consumption on this bias and response preparation using EEG.

Main Methods:

• An adapted alcohol-Approach Avoidance Task (AAT) was used with 18 social drinkers.
• Electroencephalography (EEG) measured event-related desynchronization in the beta band (beta-ERD).
• Participants were tested under both placebo and alcohol conditions in a counterbalanced design.

Main Results:

• Increased posterior beta-ERD was observed during preparation for alcohol-approach trials.
• Beta-ERD in congruent blocks significantly increased after alcohol administration.
• These findings suggest alcohol facilitates preparatory processes for approaching alcohol cues.

Conclusions:

• Advance response preparation plays a role in the alcohol approach bias.
• Acute alcohol intake enhances preparatory processes for alcohol-approach actions.
• The adapted AAT and EEG are valuable tools for studying approach biases in addiction.