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Orit Yarden
08-31-1993, 06:31 PM
Dear colleagues,

Several days ago I posted message asking for values of the parallel
elastic components in the wrist and elbow muscles. I would like to thank
all those who replied with some very helpful information.

Below is a summary of replies for those of you who expressed their interest.

Thanks again
Orit Yarden



From: James Fee

Take a look at:
Winters, J. M. & Stark, L "Analysis of Fundamental Human
Movement Patterns Through the Use of In-Depth Antagonistic
Muscle Models" IEEE Trans Biomedical Engr Vol BME-32 No. 10
pp 826-839 October 1985.



To: yarden@eng.tau.ac.il
Subject: wrist parallel elasticity

We haven't measured parallel elasticity in individual wrist muscles, but did
find that the passive elasticity about the wrist was very small over the middle
90-100 degrees of the range of motion ( < 0.1 Nm over the middle 80 degrees,
Lehman and Calhoun, An identified model for human wrist movements, Exp. Brain
Res 81:199-208, 1990). Lakie, Walsh and Wright did a sinusoidal i/o
identification
(J. Physiol 353:265-285, 1984) and also found small net elasticity. Rick
Lieber may have individual muscle values.

Steve Lehman
University of California, Berkeley



From: "Roger V. Gonzalez"

You might try these references to get good numbers for general Parallel elastic
Component of muscle. The references are:

Zajac, F.E., and Gordon, M.E. (1989) Determining muscle's force and action in
multi-articular movements. Exercise
and Sport ScienceReview, 17:187-230.

Pandy, M.G., Zajac, F.E., Sim, E., and Levine, W.S. (1990) An optimal control
model for maximum-height
human jumping. J. Biomechanics 23(12):1185-1198.

Roger Gonzalez |
The University of Texas at Austin |
Mechanical/Biomedical Engineering |
Engineering Teaching Center, 3.104 | __
Austin, Texas 78712 | / \/
(512) 471-5718 / 471-5615 | \__/\
FAX: (512) 471-7683 |
E-mail: roger@armus.me.utexas.edu |
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