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Using Virtual Reality to Transfer Motor Skill Knowledge from One Hand to Another
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Motor skill training without online visual feedback enhances feedforward control.

Adi Raichin1, Anat Shkedy Rabani1, Lior Shmuelof1,2

  • 1Department of Cognitive and Brain Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.

Journal of Neurophysiology
|September 15, 2021
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Summary

Training without online visual feedback enhances feedforward motor control more effectively than training with it. This suggests online feedback may suppress improvements in reliable movement execution during skill acquisition.

Keywords:
drawingfeedback controlmotor learningpointingreaching

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Area of Science:

  • Motor learning and control
  • Human motor performance
  • Neuroplasticity and skill acquisition

Background:

  • Motor skill learning relies on both feedforward control (reliable motor plan execution) and feedback control (online adjustments).
  • The interplay between these control mechanisms and how different training feedback types influence them remains unclear.
  • Understanding these dynamics is crucial for optimizing motor skill acquisition strategies.

Purpose of the Study:

  • To investigate the distinct contributions of feedforward and feedback control to motor skill learning.
  • To examine how different feedback conditions (online visual feedback vs. knowledge of performance) impact the improvement of these control components.
  • To characterize the effects of training feedback on motor acuity and learning efficiency.

Main Methods:

  • Utilized the arc-pointing task (APT), a high-acuity drawing task, to assess motor skill learning.
  • Experiment 1 compared performance changes in groups receiving online visual feedback (OF), knowledge of performance (KP), or both (KP + OF).
  • Experiment 2 employed specific test probes to quantify improvements in both feedback and feedforward control mechanisms under different training conditions.

Main Results:

  • Training without online visual feedback (KP group) showed an advantage in fast test speeds compared to the KP + OF group, indicating enhanced feedforward control.
  • Both KP + OF and KP groups improved in feedforward and feedback control, with a trend suggesting greater feedforward improvement in the KP group.
  • Online visual feedback appeared to suppress the improvement of feedforward control during motor skill learning.

Conclusions:

  • Online visual feedback may hinder the development of robust feedforward motor control.
  • Knowledge of performance feedback, especially when delivered without concurrent online visual feedback, may promote superior feedforward control development.
  • Optimizing motor skill learning may involve strategic use of feedback to foster both reliable movement execution and adaptive online control.