Obstacle Avoidance amongst Parkinson Disease Patients Is Challenged in a Threatening Context

Figure 3

Horizontal centre of mass velocity for two strides prior to obstacle crossing stride for neurologically normal older adults (CTRL; 𝑛=10), the MEDS off Parkinson disease patients (OFF; 𝑛=10), and the same patients with normal medication levels restored (ON; 𝑛=10) in unobstructed walking trials. G and T indicate significant main effects (𝑃<.017) for group and threat, while G×T indicates a significant interaction (𝑃<.017) of group and threat effects.