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Updated: Feb 3, 2026

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Dysfunctional preparatory processes in hazardous drinkers: An ERP study.

John S Y Chan1, Yi Jin2, Yuejia Luo2

  • 1Laboratory of Neuromotor Control and Learning, Shenzhen University, Shenzhen, China.

Alcohol (Fayetteville, N.Y.)
|October 26, 2018
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Summary

Hazardous alcohol use impairs cognitive and motor functions. This study found hazardous drinkers show reduced brain activity during motor preparation and imagery, indicating attentional control deficits.

Keywords:
Contingent negative variationEvent-related potentialHazardous drinkingMotor executionMotor imagery

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Addiction Research

Background:

  • Alcohol consumption is linked to deficits in cognitive and motor performance.
  • Electrophysiological studies are crucial for understanding brain activity during cognitive tasks.
  • Distinguishing effects on motor imagery versus execution is important for understanding alcohol's impact.

Purpose of the Study:

  • To investigate electrophysiological differences in motor preparation and imagery between hazardous drinkers and controls.
  • To assess how hazardous drinking affects preparatory brain activity preceding motor tasks.
  • To differentiate the impact of alcohol on motor execution versus motor imagery.

Main Methods:

  • An electrophysiological study comparing 22 hazardous drinkers and 22 non-hazardous controls.
  • Participants performed or imagined a 3-key response sequence after a cue.
  • Measured early and late negative contingent variation amplitudes as indicators of brain activity.

Main Results:

  • Hazardous drinkers exhibited significantly smaller amplitudes of early and late negative contingent variation compared to controls.
  • Early negative contingent variation was greater during motor execution than motor imagery in both groups.
  • These findings suggest impaired attentional control and motor preparation in hazardous drinkers.

Conclusions:

  • Hazardous alcohol consumption is associated with demonstrable impairments in attentional control and motor preparation.
  • The preparatory processes for motor execution and imagery primarily differ in voluntary attention, not motor preparation itself.
  • Electrophysiological measures reveal distinct neural underpinnings of cognitive and motor deficits in hazardous drinkers.