Fig. 6

Response of unperturbed leg: Altered BWS. Averaged TA muscle activity for gait cycles at each of the four levels of BWS for a representative subject. Mean (darker lines) and standard deviation (lightly shaded areas) values are shown along with an indication of the timing of the perturbation. The timing of toe-off and heel-strike of the right leg within the gait cycle are represented by TO and HS, respectively