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[Relationship between postural support and intentional movement: biomechanical approach].
1Laboratoire de Physiologie du Mouvement, U.R.A. CNRS 631, Université Paris-Sud, Orsay.
Archives Internationales De Physiologie, De Biochimie Et De Biophysique
|September 1, 1991
Summary
Intentional movement requires environmental interaction and postural support. Anticipatory postural adjustments (APA) are preprogrammed counter-perturbations that maintain balance during voluntary actions.
Area of Science:
- Biomechanics
- Motor Control
- Human Movement Analysis
Context:
- Understanding voluntary movement necessitates examining biomechanical principles and the body's interaction with its environment.
- The human body, as a complex mechanical system, must maintain equilibrium against disturbances caused by movement.
Purpose:
- To review the biomechanical underpinnings of movement and the necessity of postural support.
- To analyze postural activities and anticipatory postural adjustments (APA) in sensory-motor tasks.
- To explore the role of APA as a counter-perturbation against movement-induced equilibrium loss.
Summary:
- Movement requires environmental reaction and involvement of the "postural support" system to maintain stability.
- Postural reactions are essential to counteract the balance disturbances inherent in voluntary actions.
- Anticipatory postural adjustments (APA) are preprogrammed, task-dependent responses that precede voluntary movement, acting as a counter-perturbation.
Impact:
- Provides theoretical insights into the biomechanics of movement and balance.
- Elucidates the synergistic organization of postural activities and the function of APA.
- Suggests a parallel command system for voluntary and postural components of movement.