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. Author manuscript; available in PMC: 2017 Jan 1.
Published in final edited form as: Gait Posture. 2015 Oct 21;43:187–191. doi: 10.1016/j.gaitpost.2015.09.021

Fig. 2.

Fig. 2

A) Sample PRC from a representative subject. The high amplitude changes in swing duration are the strides when the perturbation was applied. B) Phase advance or delay (ΔΦ) is plotted vs. the point in swing at which the perturbation was applied. In this context, 0 = toe off and 1 = heel strike.