Archives of Physical Medicine and Rehabilitation
Volume 91, Issue 4 , Pages 589-595 , April 2010

Knee Extensor Strength, Dynamic Stability, and Functional Ambulation: Are They Related in Parkinson's Disease?

  • Joe R. Nocera, PhD

      Affiliations

    • Brain Rehabilitation Research Center, Malcom Randall Veterans Affairs Medical Center, Gainesville, FL
    • Department of Aging and Geriatrics, University of Florida, Gainesville, FL
    • Corresponding Author InformationReprint requests to Joe R. Nocera, PhD, University of Florida, Dept of Applied Physiology and Kinesiology, PO Box 118205, Room 151 Florida Gym, Gainesville, FL 32611
    • ,
  • Thomas Buckley, EdD

      Affiliations

    • Department of Health and Kinesiology, Georgia Southern University, Statesboro, GA
    • ,
  • Dwight Waddell, PhD

      Affiliations

    • Department of Health, Exercise Science, and Recreation Management, University of Mississippi, Oxford, MS
    • ,
  • Michael S. Okun, MD

      Affiliations

    • Brain Rehabilitation Research Center, Malcom Randall Veterans Affairs Medical Center, Gainesville, FL
    • Department of Neurosurgery, University of Florida, Gainesville, FL
    • ,
  • Chris J. Hass, PhD

      Affiliations

    • Brain Rehabilitation Research Center, Malcom Randall Veterans Affairs Medical Center, Gainesville, FL
    • Department of Applied Physiology & Kinesiology, University of Florida, Gainesville, FL

  • Image Result

    COP-COM moment arm relationship. When the distance between the COM and the COP projections (known as the COP-COM moment arm) increases, mechanical stability decreases and postural control must act to

    COP-COM moment arm relationship. When the distance between the COM and the COP projections (known as the COP-COM moment arm) increases, mechanical stability decreases and postural control must act to return the COM to a stable position.

 Supported by the National Institute on Deafness and other Communication Disorders (grant no. T32DC008768), and the UF National Parkinson's Foundation Center of Excellence.

 No commercial party having a direct financial interest in the results of the research supporting this article has or will confer a benefit on the authors or on any organization with which the authors are associated.

PII: S0003-9993(09)00996-4

doi: 10.1016/j.apmr.2009.11.026

Archives of Physical Medicine and Rehabilitation
Volume 91, Issue 4 , Pages 589-595 , April 2010

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