Compliance of the Human Ankle Joint

[+] Author and Article Information
G. C. Agarwal

College of Engineering, University of Illinois at Chicago Circle, Chicago, Ill.

C. L. Gottlieb

Department of Physiology, Rush-Presbyterian-St. Luke’s Medical Center, Chicago, Ill.

J Biomech Eng 99(3), 166-170 (Aug 01, 1977) (5 pages) doi:10.1115/1.3426285 History: Received May 25, 1977; Online October 21, 2010


The dynamic response of the human ankle joint to a band-limited (0 to 50 Hz) gaussian torque disturbance superimposed on a constant bias torque is observed at different levels of voluntary contraction of the leg muscles acting about the ankle. The compliance of the ankle joint, defined as the ratio of the joint rotation and applied torque is modeled by a second-order, linear dynamic model. The visco-elastic properties of the joint are shown to be linear functions of the muscle activation.

Copyright © 1977 by ASME
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