All data points are from the subjects in both the naïve and hemi-parkinsonian state. PPR is shown with blue markers and number of rears is shown with red. PPR was significantly correlated with motor time (t-test: p < 0.001). The blue line indicates the linear relationship between the two found via regression. Number of rears was significantly negatively correlated with motor time (t-test: p < 0.05) and the red line is found via linear regression.