Typical phase plots for entrained gaits, some level of entrained gaits, and non-entrained gaits.

Example of phase plots of subjects who exhibited entrainment (A), some level of entrainment (B), and non-entrainment (C) for a given condition. The circles represents the time of each heel strike relative to the stimulation period. A) Entrainment is represented by a vertical line of circles when gait cycles periods were stacked atop each other. B) Example of phase plots of a subjects who exhibited some level of entrainment for a given condition. C) Shows distinctive results of non-entrained to perturbation. When the heel strikes drift to the right, the actual gait cycle period was longer than the stimulation period. When the heel strikes drift to the left, the actual gait cycle period was shorter than the stimulation period.