Gait & Posture
Volume 25, Issue 1 , Pages 112-120, January 2007

Organization of postural responses following a rotational support surface perturbation, after TKA: Sagittal plane rotations

  • William H. Gage

      Affiliations

    • Toronto Rehabilitation Institute, 550 University Avenue, Toronto, Ont., Canada M5G 2A2
    • University of Waterloo, 200 University Avenue West, Waterloo, Ont., Canada N2L 3G1
    • Corresponding Author InformationCorresponding author at: Toronto Rehabilitation Institute, Suite 1209, 550 University Avenue, Toronto, Ont., Canada M5G 2A2. Tel.: +1 416 597 3422x3868.
    • ,
  • James S. Frank

      Affiliations

    • University of Waterloo, 200 University Avenue West, Waterloo, Ont., Canada N2L 3G1
    • ,
  • Stephen D. Prentice

      Affiliations

    • University of Waterloo, 200 University Avenue West, Waterloo, Ont., Canada N2L 3G1
    • ,
  • Peter Stevenson

      Affiliations

    • University of Waterloo, 200 University Avenue West, Waterloo, Ont., Canada N2L 3G1

Received 15 June 2005; received in revised form 27 September 2005; accepted 14 February 2006. published online 03 April 2006.

Abstract 

Proprioceptive dysfunction, related to osteoarthritis and total knee arthroplasty (TKA) may be related to changes in gait, and may result in balance impairment. This study examined the organization of postural responses to rotational support surface perturbations after TKA. Eight TKA patients and nine control participants volunteered. EMG was collected bilaterally from lower limb muscles. Kinematic data were collected using an OPTOTRAK system. The temporal pattern of muscle activation was preserved in both the surgical and sound limbs of the patient groups, while muscle activation amplitude was reduced. Knee joint angular displacement was reduced in both limbs among patients. COM displacement was not different. Patients demonstrated a different method in recovering posture control following a postural perturbation. Bilateral changes appear to reflect a simplification in the organization of the motor response, in response to the needs of the injured, or previously injured limb.

Keywords: Total knee arthroplasty, Osteoarthritis, Balance control, Postural perturbation

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PII: S0966-6362(06)00033-6

doi:10.1016/j.gaitpost.2006.02.003

Gait & Posture
Volume 25, Issue 1 , Pages 112-120, January 2007

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