Postural coordination patterns as a function of dynamics of the support surface

Young Gyu Ko, John Henry Challis, Karl M. Newell

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Abstract

The present study investigated the compensatory postural coordination patterns that emerge in the face of dynamic changes in the surface of support. Adult subjects stood on a moving platform that was sinusoidally translated in the anterior-posterior direction. The frequency and amplitude of the support surface translation were manipulated over a wide range of parameter values. The results revealed that as the frequency of platform motion increased, the postural system systematically exploited the available joint-space degrees of freedom and generated four distinct postural coordination modes (a rigid mode → ankle mode → ankle-hip mode → ankle-hip-knee mode). It appears that upright standing posture has a small set of coordination patterns that are particular to the dynamics of the surface of support.

Original languageEnglish (US)
Pages (from-to)737-764
Number of pages28
JournalHuman Movement Science
Volume20
Issue number6
DOIs
StatePublished - Dec 1 2001

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All Science Journal Classification (ASJC) codes

  • Biophysics
  • Orthopedics and Sports Medicine
  • Experimental and Cognitive Psychology

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