Postural preparation to stepping: Coupled center of pressure shifts in the anterior-posterior and medio-lateral directions

Clint Hansen, Jacques La Rue, Manh Cuong Do, Mark Latash

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We explored changes in the postural preparation to stepping introduced by modifications of the initial coordinates of the center of pressure (COP). We hypothesized that the postural adjustments in the anterior-posterior direction would persist across all initial COP manipulations while the adjustments in the medio-lateral direction would be highly sensitive to the initial COP coordinate. Healthy subjects stood on a force plate, shifted the body weight to one of the initial conditions that spanned the range of COP coordinates in both directions, and initiated a single step or started to walk. No major changes were observed between the stepping and walking conditions. Changes in the initial COP coordinate in the medio-lateral direction led to scaling of the magnitude of the COP shift in that direction prior to stepping accompanied by a nearly proportional change in the COP shift in the anterior-posterior direction. Changes in the initial COP coordinate in the anterior-posterior direction led to scaling of the magnitude of the COP shift in that direction prior to stepping without consistent changes in the COP shift in the medio-lateral direction. We interpret the results as reflecting a neural organization using a small set of referent body configurations for the postural adjustments.

Original languageEnglish (US)
Pages (from-to)5-14
Number of pages10
JournalJournal of Human Kinetics
Volume54
Issue number1
DOIs
StatePublished - Jan 1 2016

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Pressure
Direction compound
Walking
Healthy Volunteers
Body Weight

All Science Journal Classification (ASJC) codes

  • Physical Therapy, Sports Therapy and Rehabilitation
  • Physiology (medical)

Cite this

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abstract = "We explored changes in the postural preparation to stepping introduced by modifications of the initial coordinates of the center of pressure (COP). We hypothesized that the postural adjustments in the anterior-posterior direction would persist across all initial COP manipulations while the adjustments in the medio-lateral direction would be highly sensitive to the initial COP coordinate. Healthy subjects stood on a force plate, shifted the body weight to one of the initial conditions that spanned the range of COP coordinates in both directions, and initiated a single step or started to walk. No major changes were observed between the stepping and walking conditions. Changes in the initial COP coordinate in the medio-lateral direction led to scaling of the magnitude of the COP shift in that direction prior to stepping accompanied by a nearly proportional change in the COP shift in the anterior-posterior direction. Changes in the initial COP coordinate in the anterior-posterior direction led to scaling of the magnitude of the COP shift in that direction prior to stepping without consistent changes in the COP shift in the medio-lateral direction. We interpret the results as reflecting a neural organization using a small set of referent body configurations for the postural adjustments.",
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Postural preparation to stepping : Coupled center of pressure shifts in the anterior-posterior and medio-lateral directions. / Hansen, Clint; La Rue, Jacques; Do, Manh Cuong; Latash, Mark.

In: Journal of Human Kinetics, Vol. 54, No. 1, 01.01.2016, p. 5-14.

Research output: Contribution to journalArticle

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