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Development of multiple movement representations with practice: specificity versus flexibility.

M C Soucy1, L Proteau

  • 1Département de kinésiologie, Université de Montréal, P.O. Box 6128, Station Centreville, Montréal, Québec H3C 3J7, Canada.

Journal of Motor Behavior
|August 10, 2001
PubMed
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Extensive practice with different sensory inputs creates adaptable movement representations. However, insufficient initial practice may lead to reliance on visual information for movement control.

Area of Science:

  • Motor Control
  • Neuroscience
  • Human Movement Science

Background:

  • Individuals adapt movement control strategies based on available sensory information.
  • The brain forms internal representations of movements influenced by practice conditions.

Purpose of the Study:

  • To investigate if varied afferent information during practice leads to distinct movement representations.
  • To determine how different sensory conditions impact the development and accessibility of movement representations for motor control.

Main Methods:

  • Experiment 1: Participants practiced manual aiming movements under target-only vision, followed by normal vision.
  • Experiment 2: Varied durations of initial target-only practice were tested before extensive normal vision practice.
  • Control groups practiced under consistent visual conditions (normal or target-only).

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Main Results:

  • Extensive practice in a target-only condition, followed by normal vision, allowed retained access to the initial movement representation.
  • Reduced initial practice in the target-only condition prevented the maintenance of this representation when followed by extensive normal vision practice.
  • Movement control adapts to utilize the most accurate sensory information available.

Conclusions:

  • Sufficiently extensive practice under varying sensory conditions enables flexible movement planning and control.
  • Visual afferent information is prioritized for accuracy, potentially dominating other sensory inputs if initial practice is limited.
  • The duration and sequence of sensory input during practice critically influence the resulting movement representation and control strategy.