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. Author manuscript; available in PMC: 2018 Jul 1.
Published in final edited form as: Exp Brain Res. 2017 Apr 28;235(7):2243–2258. doi: 10.1007/s00221-017-4971-y

Figure 3.

Figure 3

Time-normalized profiles of the center of pressure coordinate in the anterior-posterior direction (COPAP; A and B) and the standard deviation of COPAP (SD-COP; C and D) with standard error shades. Participants were at the anterior-most position at 0% and 100%, of the sway cycle. At about 50% of the sway cycle, participants were at the posterior-most position. A and C: Experiment 1. The dashed line represents the mean data for PD patients and the solid line represents the mean data for the controls. B and D: Experiment 2. The dashed line represents the mean data for the off-drug condition and the solid line represents the mean data for the on-drug condition.