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Related Experiment Videos

Motor fatigue and cognitive task performance in humans.

Monicque M Lorist1, Daniel Kernell, Theo F Meijman

  • 1Department of Medical Physiology, University of Groningen, Grote Kruisstraat 2/1, 9712 TS Groningen, The Netherlands. m.m.lorist@ppsw.rug.nl

The Journal of Physiology
|November 16, 2002
PubMed
Summary

Cognitive functions and motor control interact during fatiguing exercise. Performing a cognitive task during fatiguing muscle contractions significantly impairs cognitive performance and increases motor variability.

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Area of Science:

  • Neuroscience
  • Motor Control
  • Cognitive Science

Background:

  • Maintaining constant force during fatiguing contractions requires increased central command.
  • The interplay between central mechanisms of motor control and cognitive functions during fatigue is not well understood.

Purpose of the Study:

  • To investigate the interaction between cognitive functions and central motor control mechanisms during fatiguing submaximal contractions.

Main Methods:

  • Subjects performed an auditory choice reaction task (CRT) alone, with non-fatiguing contractions, and with fatiguing contractions.
  • Force variability during fatiguing contractions was also measured.

Main Results:

  • Cognitive performance in the choice reaction task (CRT) significantly deteriorated when performed concurrently with fatiguing contractions.

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  • Force variability increased more substantially during fatiguing dual-task conditions compared to fatiguing contractions alone.

    • Conclusions:

    • Cognitive functions and central motor control mechanisms mutually interact during fatigue.
    • This interaction negatively impacts both cognitive performance and motor output stability.