Figure 1.

A representative episode of a cat paw shake response. (A) Stick figures and trajectories of the right metatarsophalangeal and ankle joints during several cycles of paw shake. (B) Normalized resultant muscle moments at the ankle and knee (top, positive values designate extension); normalized raw, full-wave rectified EMG activity (middle traces) of MG (positive values) and SO (negative values); and MTU velocity (bottom traces) of MG and SO, where positive MTU velocity corresponds to lengthening. The gray rectangle indicates a single paw shake cycle.