A physiologically based neuromusculoskeletal model for the design of FNS control strategies

A new mathematical model for the neuromusculoskeletal dynamics of the lower limb in man is outlined. This model incorporates recently developed, and physiologically based, mathematical models of human skeletal muscle and the lower limb. Experimental and simulation results of lower limb skeletal dynamics during N-let and constant frequency FNS are presented and compared. The model captures the nonlinear muscle and skeletal dynamics observed in experiment. Using this model it is also found that the skeletal dynamics in normal subjects can only be adequately modelled by the inclusion of a stretch reflex loop. This model is envisaged as being of use in the design of skeletal motion control strategies