Time Window of Perturbation-Induced Response Triggered by Ankle Motion and Body Sway above the Ankle.

We determined the precise time windows of the electromyographic (EMG) response components triggered by ankle motion and by body sway above the ankle. A support surface under the feet of healthy young adult participants in the quiet stance was moved in translation. The EMG response component triggered by body displacement above the ankle began at 95-100 ms and ended 145-155 ms after the onset of the support surface translation.