Functional imaging of cognitive control during acute alcohol intoxication

Area of Science:

• Neuroscience
• Cognitive Psychology
• Neuroimaging

Background:

• The anterior cingulate and prefrontal/parietal regions are crucial for error processing and cognitive control.
• Limited research exists on alcohol's dose-dependent effects on these brain regions during error-prone tasks.

Purpose of the Study:

• To investigate the impact of varying alcohol doses on brain activity during error processing.
• To examine alcohol's effects on cognitive control using functional magnetic resonance imaging (fMRI).

Main Methods:

• 38 healthy volunteers underwent fMRI while performing a Go/No-Go task.
• Participants received a placebo, moderate (0.05% BrAC), or high (0.10% BrAC) alcohol dose.
• Brain hemodynamic activity was measured during task performance.

Main Results:

• Alcohol consumption led to a dose-dependent increase in reaction time and false alarm errors.
• fMRI data showed decreased activity in the anterior cingulate, lateral prefrontal cortex, insula, and parietal lobe during false alarms.
• These neural changes correlated with impaired error processing.

Conclusions:

• Alcohol significantly affects brain regions involved in error processing and cognitive control.
• Findings suggest a neural mechanism underlying alcohol's detrimental effects on behavioral performance and decision-making.