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Synergistic Moments at the Hip and Knee Joints Are Altered in Post-Stroke Hemiplegic Gait

[+] Author Affiliations
Jeff A. Nessler

Rehabilitation Institute of Chicago, Chicago, ILNorthwestern University, Chicago, ILCalifornia State Polytechnic University, Pomona, Pomona, CA

Winsean Lin

Rehabilitation Institute of Chicago, Chicago, IL

Yasin Dhaher

Rehabilitation Institute of Chicago, Chicago, ILNorthwestern University, Chicago, IL

Paper No. SBC2007-175864, pp. 1-2; 2 pages
  • ASME 2007 Summer Bioengineering Conference
  • ASME 2007 Summer Bioengineering Conference
  • Keystone, Colorado, USA, June 20–24, 2007
  • Conference Sponsors: Bioengineering Division
  • ISBN: 0-7918-4798-5
  • Copyright © 2007 by ASME


Following stroke, many patients are unable to adequately bend their knee during the swing phase of gait [1,2]. This loss of functional control may be related to an abnormal muscle synergy or torque couple in the lower limb, similar to those reported for the upper extremity [3–5]. For example, several investigators have described a flexor synergy that couples shoulder abduction torque and elbow flexion torque under static, isometric conditions [3–4]. This couple is typically altered following stroke [3–4]. In the lower extremity, hip kinetics in the frontal plane appear to be coupled with knee kinetics in the sagittal plane for static, isometric conditions [6]. It is unknown, however, whether the same relationship holds for hip and knee kinetics under dynamic conditions, such as during the swing phase of gait.

Copyright © 2007 by ASME
Topics: Knee



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