Separate PCA of force tracking traces for control subjects and patients.

<p><b>A</b>. Average force trace for each control subject (left) and each patient (medicated and non-medicated patients pooled, right). Note higher variations of baseline force in patients. <b>B–D</b>. PC loading as a function of time for PC1, PC2 and PC3, respectively. <b>B</b>. PC1 loading as a function of time for controls (left) and patients (right). Strong resemblance to force trace present in controls, less so in patients. <b>C</b>. PC2 loading as a function of time for controls (left) and patients (right). Resemblance to the inverse force profile in both groups. <b>D</b>. PC3 loading as a function of time for controls (left) and patients (right). Strongest loading during force transitions (ramp and release) for both groups.