Determination of Muscle Orientations and Moment Arms

[+] Author and Article Information
K. N. An, K. Takahashi, T. P. Harrigan, E. Y. Chao

Biomechanics Laboratory, Department of Orthopedics, Mayo Clinic/Mayo Foundation, Rochester, Minn. 55905

J Biomech Eng 106(3), 280-282 (Aug 01, 1984) (3 pages) doi:10.1115/1.3138494 History: Received August 17, 1982; Revised March 19, 1984; Online June 15, 2009


In muscle force analysis, orientations and moment arms of the muscles about a joint provide essential coefficients in the equilibrium equations. For the determination of these parameters, several experimental techniques, including geometric measurement, tendon-joint displacement measurement and direct load measurement, are available. Advantages and disadvantages associated with each of the techniques are reviewed and compared based on our extensive experience.

Copyright © 1984 by ASME
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