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Journal of Experimental Biology, Vol 201, Issue 6 869-875, Copyright © 1998 by Company of Biologists

JOURNAL ARTICLES

Predicting force generation by lamprey muscle during applied sinusoidal movement using a simple dynamic model

T. L. Williams, G. Bowtell and N. A. Curtin

Experiments were performed on single-myotome preparations of lamprey muscle, to discover whether force developed by intermittent tetanic stimulation during imposed sinusoidal movement could be predicted by data collected from isometric and constant-velocity experiments. We developed a simple dynamic model consisting of a set of simultaneous ordinary differential equations with unknown parameters. Appropriate values of the parameters were found by fitting numerical solutions of the differential equations to data from the isometric and constant-velocity experiments. Predictions were made of the time course of force developed during imposed sinusoidal movement in which the phase between muscle shortening and tetanic stimulation was varied to cover the whole phase spectrum. The match between the predicted and recorded time courses was very good for all phases, and particularly for those phases that are seen during swimming in the intact animal.


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