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Motor control theories and their applications.

Mark L Latash1, Mindy F Levin, John P Scholz

  • 1Department of Kinesiology, Rec. Hall-268, Penn State University, University Park, PA 16802, USA. mll11@psu.edu

Medicina (Kaunas, Lithuania)
|October 15, 2010
PubMed
Summary
This summary is machine-generated.

This study explores key motor control hypotheses, including equilibrium-point and uncontrolled manifold theories, offering insights into voluntary and involuntary movements. Findings support these models for understanding motor learning and disorders like spasticity.

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Area of Science:

  • Neuroscience
  • Biomechanics
  • Motor Control

Background:

  • Several influential hypotheses exist in motor control, including the equilibrium-point (referent configuration) hypothesis, the uncontrolled manifold hypothesis, and the principle of motor abundance.
  • These hypotheses offer frameworks for analyzing voluntary and involuntary movements, with the equilibrium-point hypothesis focusing on neuronal activation thresholds and the uncontrolled manifold hypothesis on dynamic systems and redundancy.

Purpose of the Study:

  • To describe and integrate influential hypotheses in motor control: equilibrium-point, uncontrolled manifold, and motor abundance.
  • To review experimental data supporting these hypotheses in healthy individuals and patients with movement disorders.
  • To discuss the application of these hypotheses to motor learning and movement disorders such as spasticity.

Main Methods:

  • Review of existing literature and experimental data on motor control hypotheses.
  • Analysis of voluntary and involuntary movements using the equilibrium-point hypothesis framework.
  • Application of the uncontrolled manifold hypothesis to analyze synergic changes in redundant motor systems.

Main Results:

  • The equilibrium-point hypothesis provides a framework for analyzing single muscle control via tonic stretch reflex thresholds, without assuming internal model computations.
  • The uncontrolled manifold hypothesis offers tools for analyzing synergistic stabilization of performance variables within redundant systems.
  • The referent configuration hypothesis and principle of abundance can be integrated into a unified control scheme for multi-element systems.

Conclusions:

  • The equilibrium-point and uncontrolled manifold hypotheses, along with the principle of abundance, represent promising frameworks for motor control research.
  • Movement disorders like spasticity may result from impaired tonic stretch reflex threshold shifts.
  • These hypotheses are supported by experimental data and have significant applications in motor learning and clinical studies.