Experimental Physiology
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Quarterly Journal of Experimental Physiology 73.4 pp 627-630
© The Physiological Society 1988
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THIXOTROPY: THE EFFECT OF STIMULATION IN FROG MUSCLE

M. Lakie 1 and Lesley G. Robson 1

1 Department of Biology and Preclinical Medicine, Bute Medical Buildings, University of St Andrews, St Andrews, Fife KY16 9TS

Recent reports have shown that the stiffness of relaxed frog muscle is not a fixed property, but is dependent on the previous history of movement (Lakie & Robson, 1988a). Passive movement decreases stiffness; when the muscle is subsequently allowed to rest it returns at a progressively declining rate to a level of stiffness that is close to its original value (Lakie & Robson, 1988b). We now report that the stiffness of relaxed muscle is also affected by prior tetanic electrical stimulation under isometric conditions. The effect of electrical stimulation is similar to passive movement in that both produce a temporary decrease in stiffness.

Submitted on May 6, 1988
Accepted on May 16, 1988






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Copyright © 1988 by the The Physiological Society.