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Adaptation in visuomanual tracking depends on intact proprioception
1Unité Mixte de Recherche Mouvement et Perception Faculté des Sciences du Sport, Université de la Méditerranée.
Journal of Motor Behavior
|December 29, 2009
Summary
Arm proprioception is crucial for motor learning and adapting to altered visual feedback during visuomanual tracking tasks. Without proprioception, individuals cannot make lasting internal adjustments to visuomanual gain, impacting motor adaptation.
Area of Science:
- Neuroscience
- Motor Control
- Human Physiology
Background:
- Motor learning involves adapting movements based on sensory feedback.
- Visuomanual tracking tasks assess the coordination between visual information and arm movements.
- Proprioception, the sense of limb position and movement, is vital for motor control.
Purpose of the Study:
- To investigate the role of arm proprioception in motor learning and adaptation.
- To compare the adaptive capabilities of individuals with and without proprioception in visuomanual tracking.
- To determine if proprioception is necessary for plastic changes in visuomanual scaling.
Main Methods:
- Subjects performed visuomanual tracking tasks with altered visual feedback.
- Adaptive capabilities were assessed by measuring spatiotemporal error, trajectory curvature, and spatial gain.
- Performance was compared between control subjects (CSs) and a deafferented subject (DS).
Main Results:
- Control subjects demonstrated appropriate adaptation to altered visuomanual relationships.
- The deafferented subject adjusted tracking strategy but lacked plastic changes in internal visuomanual scaling.
- Adaptive changes in CSs persisted after restoring normal visual feedback scaling.
Conclusions:
- Arm proprioception is essential for plastic changes in visuomanual gain adaptation.
- The findings support the contribution of proprioception to motor learning and adaptation.
- Results align with previous studies on prismatic adaptation, highlighting proprioception's role.
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