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Postural synergies and their development.

Mark L Latash1, Vijaya Krishnamoorthy, John P Scholz

  • 1Dept. of Kinesiology, The Pennsylvania State University, University Park, PA 16802, USA. mll11@psu.edu

Neural Plasticity
|August 16, 2005
PubMed
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The uncontrolled manifold (UCM) hypothesis quantifies motor synergies, revealing how the brain stabilizes actions. This approach assesses coordination and its changes with practice in typical and atypical development.

Area of Science:

  • Neuroscience
  • Motor Control
  • Biomechanics

Background:

  • Motor abundance allows for flexible control of redundant systems.
  • The central nervous system (CNS) stabilizes key performance variables by organizing covariation in elemental variables.
  • The uncontrolled manifold (UCM) hypothesis provides a framework for analyzing motor synergies.

Purpose of the Study:

  • To quantitatively assess multi-effector coordination using the UCM hypothesis.
  • To investigate the emergence and modification of motor synergies with practice.
  • To explore postural synergy development in typically and atypically developing individuals.

Main Methods:

  • Application of the UCM hypothesis to analyze motor synergies.
  • Assessment of anticipatory postural adjustments and voluntary postural sway.

Related Experiment Videos

  • Examination of motor practice effects on synergy modification.

    • Main Results:

    • The UCM approach enables quantitative assessment of multi-effector coordination.
    • Demonstrated emergence and modification of motor synergies in typical and Down syndrome populations.
    • Provided a framework for studying developing postural synergies.

    Conclusions:

    • The UCM hypothesis is a valuable tool for analyzing motor synergies and coordination.
    • Motor synergies are adaptable and can be modified through practice.
    • This framework facilitates research into developmental changes in postural control.