Fig. 6

Stepping responses. Step length, step width and step time responses in unperturbed walking and after selected perturbations in transversal plane. Step length and step width responses correspond to distances between anterior and posterior ankle marker at the time of left (approximately at 0, 100 and 200 %) and right (approximately at 50, 150 and 250 %) foot strikes. Step time responses correspond to time intervals between consecutive foot off and foot strike of the same leg, i.e. left step times (approximately from −50 to 0 %, from 50 to 100 % and from 150 to 200 %) or right step times (approximately from 0 to 50 %, from 100 to 150 % and from 200 to 250 %) feet respectively