A general myocybernetic control model of skeletal muscle is presented which constitutes an extension, to general control modes, of a previously published control model. The restriction, in the previous model, to a constant number of stimulated motor units has been removed and the new model allows for both a varying number of stimulated motor units and a varying average stimulation rate. The general model is tested by comparing its predictions with experimental records of the force output of the quadriceps femoris muscle. It is found that the model correctly predicts the initial excitation-contraction delay, the dips in the force record, and several other contraction phenomena.
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