Figure 1.

An outline of the protocol used to investigate locomotor adaptation and adaptive learning. Solid black horizontal lines indicate that the belts were moving at the same speed. The solid white lines represent the nondominant limb in HYA and HOA and the more-affected limb in PD while the dashed white lines represent the contralateral limb. “Fast” indicates self-selected fastest comfortable walking speed and “Slow” indicates slow (50% of fast) walking speed.