Figure 3.

Correlation of number of submovements (left) and movement amplitude (right) with BOLD signal intensity derived from a 0.5-cm-diameter sphere centered in the left GPi/STN (MNI coordinates: 14, −18, −6). BOLD intensity values (percentage change in signal, center meaned) were derived from model estimates and beta values in one representative subject. Note the strong interaction of the number of submovements and BOLD in viscous challenge task (black line) but not the target challenge task (gray line).