Stepping in Place While Voluntarily Turning Around Produces a Long-Lasting Posteffect Consisting in Inadvertent Turning While Stepping Eyes Closed

Figure 6

Foot angle (a) and its correlation with body rotation velocity (b). The mean foot yaw angle (a) between two consecutive stance phases was similar for podokinetic stimulation and voluntary turning. During the two posteffects, the mean angle diminished. In panel (b), the mean foot angle of each subject was plotted against the mean rotation velocity while stepping, for all conditions. There was a good relationship between foot angle and subject’s angular velocity, both during voluntary turning and during the two posteffects. indicates significant difference () between mean foot angles (a).

(a)

(b)