595378.fig.002a
(a)
595378.fig.002b
(b)
Figure 2: Kinematic trajectories (a) healthy older adult and (b) individual with PD-FOG with an FO-UE event. AAPC: average antiphase cycle; FO-UERi: initiation of right upper extremity freeze; FO-UELi: initiation of left upper extremity freeze.