Fig. 6

Electromyography (EMG) activity driven by visual perturbations. Filtered and rectified EMG activity of left tibialis anterior following an upward visual perturbation while standing. The figure shows a time window from one second before to two seconds after visual perturbation. Onset latency was 1.2 s, duration of activation was 723 ms, and magnitude of activation was 3.85 μV*s