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PHYS THER
Vol. 77, No. 4, April 1997, pp. 383-384
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Author Response

Steven L Wolf, Huiman X Barnhart, Gary L Ellison and Carol E Coogler

This excerpt was created in the absence of an abstract.

We thank Dr Horak, one of the world's outstanding authorities on posture and movement, for providing such a thoughtful commentary. Given that one important outcome rendered by commentaries and authors' responses is to provoke dialogue and creative thinking among readers, this response is crafted with that perspective in mind.

Dr Horak is most accurate when she states that what we are describing is not postural stability, but rather postural sway. We, too, view sway as a component of posture. Sway can be measured as changes in center of pressure, center of mass, or a combination thereof, and, like kinematic and electromyographic measures, sway contributes to the total picture of biped (or quadruped) stance characteristics. Therefore, sway measures should not be construed as the sole or major component of postural stability.

Where we begin to differ slightly from Horak and Macpherson's definition of postural stability1 is the inclusion of fall behaviors....


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Related Articles

The Effect of Tai Chi Quan and Computerized Balance Training on Postural Stability in Older Subjects
Steven L Wolf, Huiman X Barnhart, Gary L Ellison, Carol E Coogler, and Atlanta FICSIT Group
Physical Therapy 1997 77: 371-381. [Abstract] [PDF]

Invited Commentary
Fay B Horak
Physical Therapy 1997 77: 382-383. [Abstract] [PDF]





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Copyright © 1997 by the American Physical Therapy Association.