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RESEARCH PAPERS

A Biomechanical Model of the Posterior Knee Capsule of the Cat

[+] Author and Article Information
A. H. Hoffman, D. M. Flynn

Department of Mechanical Engineering, Worcester Polytechnic Institute, Worcester, Mass. 01609

P. Grigg

Department of Physiology, University of Massachusetts Medical School, Worcester, Mass. 01605

J Biomech Eng 107(2), 140-146 (May 01, 1985) (7 pages) doi:10.1115/1.3138534 History: Received July 06, 1984; Revised November 30, 1984; Online June 15, 2009

Abstract

A biomechanical model is presented which represents the upper edge of the posterior knee capsule in the cat as a two-segment, vertically loaded catenary suspension cable from which the capsule sheet is suspended. Data are presented which show that the upper edge of the capsule is organized as a cable, which spans the notch between the femoral condyles. When a point load is applied to the cable, measurement of the cable shape allows for calculation of the cable tension and the downward distributed loads acting on the cable. This method was used to measure the in-vivo cable tension and the distributed downward loading acting on the capsule cable. The results show that the lateral side of the posterior joint capsule sustains a higher loading than the medial side.

Copyright © 1985 by ASME
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