Effect of ankle perturbation period and stimulus amplitude on entrainment.

Indicates the number of subjects who showed entrainment with the changes of ankle perturbation period. The darker and gray squares represent subjects that exhibited entrainment to the full and to some degree, respectively. The while squares represent subjects that were non-entrained. (A) Shows the effects of ankle perturbations at full amplitude. (B) Shows the effects of ankle perturbations at reduced amplitude. The plots on the left show the results for each individual subjects, whereas the plots on the right show the results without distinction from the subjects.