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Related Experiment Videos

Alcohol consumption impairs stimulus- and error-related processing during a Go/No-Go Task.

Craig Easdon1, Aaron Izenberg, Maria L Armilio

  • 1Rotman Research Institute, Baycrest Centre for Care, Toronto, Ontario, Canada.

Brain Research. Cognitive Brain Research
|November 1, 2005
PubMed
Summary

Alcohol impairs cognitive control, increasing errors in tasks like the go/no-go task. This study shows alcohol affects attention and response inhibition, impacting performance and brain activity.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Psychopharmacology

Background:

  • Alcohol consumption is known to impair cognitive control.
  • Performance deficits in tasks requiring high cognitive control, such as the go/no-go task, are linked to attention and response inhibition difficulties.
  • Understanding alcohol's neurophysiological effects on cognitive control is crucial.

Purpose of the Study:

  • To investigate the effects of alcohol on stimulus- and response-locked evoked potentials during a go/no-go task.
  • To differentiate between alcohol's impact on attention maintenance and response inhibition.
  • To examine dose-dependent effects of alcohol on cognitive control processes.

Main Methods:

  • Participants performed a go/no-go task before and after random assignment to control, low-dose, or moderate-dose alcohol conditions.

Related Experiment Videos

  • Electrophysiological data (stimulus- and response-locked evoked potentials) were recorded during task performance.
  • Behavioral errors and electrophysiological measures (N170, P3, Ne, Pe amplitudes) were analyzed.

    • Main Results:

    • Both alcohol doses increased errors compared to baseline performance.
    • Alcohol consumption delayed stimulus-locked negativity associated with successful response inhibition.
    • Alcohol reduced N170 and P3 amplitudes, and decreased response-locked negative (Ne) and positive (Pe) waves, particularly after moderate doses.

    Conclusions:

    • Alcohol-induced behavioral disinhibition is associated with deficits in attention maintenance and allocation.
    • Alcohol impairs the processing of incoming stimuli and the recognition of errors.
    • These findings highlight alcohol's detrimental effects on cognitive control mechanisms, impacting both attentional processes and response inhibition.