Figure 3.

Non-freezing episodes in freezing trials also have higher PAC in M1. (A) Schematic diagram depicting the slicing of non-freezing episodes (marked in orange, FN) and freezing episodes (marked in red, FF) in freezing trials. The blue line represents the vertical position of the foot, and the red line represents the freezing index (FI). (B) Schematic diagram depicting the slicing of normal-walking episodes (marked in blue, NN) in non-freezing trials. (C) Violin plots indicate the comparison of relative PAC change between FN, FF and NN episodes. The relative change was calculated as the percentage change with respect to NN scaling to the max value. Violin plots outline illustrate kernel probability density, with overlaid box plots using the same conventions as in Fig. 2B. (D) A similar neurophysiological pattern that was characterized by higher M1 PAC in FN and FF episodes was presented in all subjects. **P < 0.01, signed-rank test.