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Mental fatigue does not impede visuomotor adaptation driven by implicit processes.

Emma Peters1, Erin K Cressman1

  • 1School of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ottawa, Canada.

Consciousness and Cognition
|March 17, 2026
PubMed
Summary
This summary is machine-generated.

Mental fatigue does not impact implicit visuomotor adaptation. This suggests that mental fatigue specifically interferes with conscious strategies, not unconscious motor learning processes.

Keywords:
Executive controlExplicit strategyImplicit adaptationMental fatigueVisuomotor adaptation

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Area of Science:

  • Cognitive Neuroscience
  • Motor Control
  • Human Factors

Background:

  • Mental fatigue is known to impair visuomotor adaptation involving both explicit and implicit processes.
  • Previous work indicated mental fatigue reduces initial adaptation and explicit strategy engagement.

Purpose of the Study:

  • To investigate the specific impact of mental fatigue on implicit visuomotor adaptation.
  • To isolate the effects of mental fatigue when explicit contributions are minimal.

Main Methods:

  • Participants underwent a 32-minute mentally fatiguing task (time load dual back task) or a control task (watching a documentary).
  • Visuomotor adaptation was measured using reaching movements with a 20° clockwise visual feedback rotation in a virtual environment.
  • Mental fatigue levels were assessed before and after the tasks.

Main Results:

  • The mental fatigue group showed significantly increased mental fatigue compared to the control group.
  • Both groups exhibited similar levels of visuomotor adaptation, which occurred implicitly.
  • No significant correlation was found between the level of mental fatigue and implicit adaptation.

Conclusions:

  • Mental fatigue does not interfere with implicit visuomotor adaptation.
  • This supports the hypothesis that mental fatigue primarily affects the engagement of conscious, explicit motor strategies.