Figure 3.

A segment from a typical sequence trial for a spastic under relaxed conditions. A Position, B Half-wave rectified gastrocnemius electromyogram (GS), C Predicted intrinsic torque, D Predicted reflex torque and E Predicted overall torque (thick curve) superimposed on the actual torque (thin curve). Displacements in the PF direction were taken as negative and those in the DF direction as positive. Torque was assigned a polarity consistent with the direction of the movement that it would generate (e.g. PF torque was taken as negative).