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Memory-Guided Reaching: Is It Effortful?

Hui-Ting Goh1, Jill Campbell Stewart2, Kevin Becker3,4

  • 1School of Physical Therapy, Texas Woman's University, Dallas, TX, USA.

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|September 28, 2022
PubMed
Summary
This summary is machine-generated.

Perceived effort and fatigue increase during memory-guided reaching tasks compared to visual guidance. Subjective fatigue is linked to higher perceived effort and altered reach distance when visual cues are absent.

Keywords:
fatiguemovement planningperceived effort

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Area of Science:

  • Motor control and human movement science.
  • Neuroscience of perception and action.

Background:

  • Perceived effort during visually guided reaching is sensitive to task demands.
  • Subjective fatigue correlates with effort and performance in visually guided tasks.
  • Memory-guided reaching can reveal insights into action planning and control.

Purpose of the Study:

  • To investigate changes in perceived effort during memory-guided reaching.
  • To determine if subjective fatigue is associated with perceived effort in memory-guided reaching.

Main Methods:

  • Twenty-three young adults performed reaching movements under both visual and memory-guided conditions.
  • Measurements included perceived effort, reaction time, and endpoint error.
  • Subjective fatigue levels were self-reported.

Main Results:

  • Perceived effort, reaction time, and endpoint error significantly increased in the memory-guided condition compared to the visually guided condition.
  • Self-reported subjective fatigue correlated with perceived effort and reach distance error during memory-guided reaching.
  • Higher fatigue levels were associated with greater perceived effort and a tendency to overshoot reach distance without visual feedback.

Conclusions:

  • Memory-guided reaching increases perceived effort and performance errors compared to visually guided reaching.
  • Subjective fatigue is a significant factor associated with perceived effort and motor control during memory-guided actions.
  • Findings provide a basis for further research into the interplay of fatigue, effort, and motor control.