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Exploring the relationship between effort perception and poststroke fatigue.

William De Doncker1, Lucie Charles1, Sasha Ondobaka1

  • 1From the Department of Clinical and Movement Neuroscience, (W.D.D., S.O., A.K.) Institute of Neurology, and Institute of Cognitive Neuroscience (L.C., S.O.), UCL, London, UK.

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Summary
This summary is machine-generated.

Poststroke fatigue may stem from altered effort perception, impacting motor performance. This study links trait fatigue to implicit effort perception and motor task changes in stroke survivors.

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Area of Science:

  • Neurology
  • Rehabilitation Medicine
  • Human Physiology

Background:

  • Poststroke fatigue is a common and debilitating chronic condition.
  • The underlying mechanisms of poststroke fatigue are not fully understood.
  • Altered effort perception is a potential driver of this fatigue.

Purpose of the Study:

  • To investigate the relationship between poststroke fatigue and perceived effort (PE).
  • To determine if altered PE contributes to the development of chronic fatigue after stroke.
  • To explore the connection between PE, motor performance, and fatigue in stroke survivors.

Main Methods:

  • Fifty-eight stroke survivors with varying fatigue levels participated.
  • Measures included self-reported fatigue (trait and state), explicit and implicit PE, and handgrip motor performance.
  • Novel implicit PE measures and established fatigue scales were utilized.

Main Results:

  • Trait fatigue was significantly associated with implicit PE and motor performance, specifically length of hold.
  • Motor performance measures, like length of hold and force variability, explained explicit PE in different force conditions.
  • State fatigue did not show significant correlations with PE or motor performance.

Conclusions:

  • Altered implicit effort perception and subsequent changes in motor performance may underlie trait fatigue poststroke.
  • These findings enhance the mechanistic understanding of poststroke fatigue.
  • Targeting effort perception could be a future therapeutic strategy for chronic fatigue in stroke survivors.