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Performance fatigability does not impact the inhibitory control.

Simon Thibault1, François Hug2, Thibault Deschamps1

  • 1University of Nantes, Laboratory "Movement, Interactions, Performance" (EA 4334), Faculty of Sport Sciences, Nantes, France.

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|October 15, 2018
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Summary
This summary is machine-generated.

Muscle fatigue did not impair response inhibition in a flanker task. This suggests that the inhibition function remains robust even when finger flexor muscles experience reduced maximal voluntary force.

Keywords:
Flanker taskGratton effectHandgrip forcePerformance fatigabilityResponse inhibition

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Area of Science:

  • Neuroscience
  • Motor Control
  • Human Performance

Background:

  • Response inhibition is crucial for cognitive control.
  • Understanding the impact of physical fatigue on cognitive functions like inhibition is important.
  • Previous research has yielded mixed results on fatigue's effects on cognitive tasks.

Purpose of the Study:

  • To investigate the effect of finger flexor muscle fatigue on response inhibition.
  • To determine if reduced maximal voluntary force impacts performance in an inhibitory reaction time task.

Main Methods:

  • Sixteen healthy adults participated in two sessions: fatigue and control.
  • Fatigue was induced via a sustained handgrip force task.
  • Participants performed a flanker task requiring response inhibition after each session.

Main Results:

  • The fatiguing exercise significantly reduced maximal voluntary force by 25.2%.
  • No significant differences in reaction time or error rates were observed between fatigue and control sessions.
  • Conflict monitoring and response override functions remained unaffected by the induced fatigue.

Conclusions:

  • Finger flexor muscle fatigue does not appear to impair response inhibition in young, healthy adults.
  • The inhibition function demonstrates functional robustness under conditions of physical fatigue.
  • Further research may explore these effects in different populations or with different types of fatigue.