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Related Experiment Videos

On perturbation and pattern coexistence in postural coordination dynamics.

Benoît G Bardy1, Olivier Oullier, Julien Lagarde

  • 1Laboratoire Efficience et Déficience Motrices, Université Montpellier I and Institut Universitaire de France, Paris, France. benoit.bardy@univ-montpl.fr

Journal of Motor Behavior
|August 1, 2007
PubMed
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Defining perturbed and unperturbed stance is crucial for understanding postural control. Current definitions are insufficient, hindering a unified view of how the body maintains balance.

Area of Science:

  • Biomechanics
  • Motor Control
  • Human Movement Science

Background:

  • Postural control research distinguishes between perturbed and unperturbed stance.
  • This distinction is vital for understanding in-phase and antiphase coordination of hips and ankles.
  • Recent studies suggest a unified view of postural control is possible.

Purpose of the Study:

  • To critically examine the definitions of perturbed and unperturbed stance in postural control research.
  • To assess the readiness for a unified theoretical framework of postural control.
  • To highlight the challenges in defining these terms due to the relativity of perturbations.

Main Methods:

  • Literature review and conceptual analysis of existing postural control studies.
  • Examination of the role of reference frames in perception and action.

Related Experiment Videos

  • Analysis of the implications for unifying perturbed and unperturbed stance concepts.

    • Main Results:

    • No explicit and general definitions for 'perturbed' and 'unperturbed' stance currently exist.
    • The relativity of perturbations, dependent on frames of reference, complicates definitions.
    • Existing definitions are insufficient for a comprehensive understanding of postural control.

    Conclusions:

    • Arguments for empirical or theoretical unification of perturbed and unperturbed stance are premature.
    • A clear, generalizable definition of stance perturbations is needed before unification.
    • Future research must address the definition of reference frames in postural control.