Effects of Alcohol on Brain Activity During Cognitive Tasks
Author Information
Author(s): Gundersen Hilde, Grüner Renate, Specht Karsten, Hugdahl Kenneth
Primary Institution: University of Bergen, Norway
Hypothesis
High cognitive load would modulate neuronal activation particularly in the dACC, and alcohol intoxication at two BAC levels would have different effects.
Conclusion
Alcohol intoxication decreases neuronal activation in the dACC and cerebellum, especially during high cognitive load tasks.
Supporting Evidence
- Alcohol intoxication at BAC of 0.08% caused a decrease in neuronal activation in the dACC during the 3-back task.
- Participants showed increased neuronal activation in the dACC with increasing cognitive load in the control group.
- At BAC of 0.02%, there was no significant decrease in neuronal activation in the dACC.
Takeaway
Drinking alcohol can make it harder for your brain to work well, especially when you're trying to remember a lot of things at once.
Methodology
Functional magnetic resonance imaging (fMRI) was used with a working memory n-back task at two BAC levels.
Potential Biases
Self-reported data on alcohol consumption and other factors may introduce bias.
Limitations
The study only included healthy male participants, which may limit the generalizability of the findings.
Participant Demographics
Twenty-five right-handed, healthy male volunteers, aged 27-28 years.
Statistical Information
P-Value
0.047
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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