Figure 6. Response to hip extension during ipsilateral swing phase.

A, response from a single subject (GW). In reaction to the disturbance, the right swing and left stance phase were prolonged, as were the corresponding R TA and L GS EMG bursts (slanted arrows). B, average duration of the right swing phase, right TA EMG burst and the left stance phase for the steps preceding, during and after the disturbance (pooled data from 8 subjects). All were significantly prolonged