Fig. 7

Peak joint and trunk deflection angles. Values are depicted for the elevating, lowering, and delayed lowering strategies on the ipsilateral and contralateral limbs. Each bar depicts the inter-subject (N=7) mean of the average peak angles for each strategy, with standard deviation displayed as error bars. For the ipsilateral (perturbed) limb, peak joint flexion angle or trunk deflection angle within the perturbed step (before the perturbed foot contacts the treadmill after perturbation) and after the perturbed step (in the step following the perturbation) are reported. For the contralateral limb, peak joint flexion angle in the step following the perturbation are reported. For the ankle, flexion refers to dorsiflexion. The unperturbed values shown are the inter-subject mean of the 25-stride average prior to the perturbation. Angles are reported in degrees. For each metric, values that are significantly different from that of unperturbed walking are marked with an asterisk