595378.fig.003a
(a)
595378.fig.003b
(b)
Figure 3: Task performance amplitude (a) expressed as percent difference from baseline (10 cm) and cadence (b) expressed as percent difference from each participant’s baseline gait cadence (i.e., baseline). Bars represent standard deviations. Healthy old were different from PD−/+FOG in amplitude; there were no differences between groups in cadence.