Fig. 8.

Group averages and standard errors of S_out, S_desired, T_out, and T_desired for Control (N = 7) and Spatial Hold (N = 7) groups. A: stride-by-stride time course of S_out and S_desired for both groups. Adaptation period is represented by shaded area in gray. Spatial motor output adapted normally for the Control group, while the Spatial Hold group was prevented from adapting the spatial motor output. B: stride-by-stride time course of T_out and T_desired for both groups. Adaptation period is represented by shaded area in gray. Although S_out was not adapted in the Spatial Hold group, T_out adapted normally in this group. This suggests that the adaptation of temporal and spatial motor outputs is dissociable. C: statistical analysis on the first 10 strides of S_out for key epochs in the experimental paradigm. A significant change from early to late adaptation was found for the Control but not the Spatial Hold group. Also, significant storage from baseline to early deadaptation was found for the Control but not the Spatial Hold group. D: statistical analysis on the first 10 strides of T_out for key epochs in the experimental paradigm. In both groups T_out adapted normally: there were significant differences between early adaptation and late adaptation and between baseline and early deadaptation.