Fig. 5.

Contrast of brain activation induced by muscle and bone stimulation: contrast of weak stimulation to muscle and bone (a), contrast of strong stimulation to muscle and bone (b), and contrast of all the stimulations to muscle and bone (c). In millimeter elevations relative to a line through the anterior–posterior commissure (AC–PC line), brain slices are shown in superior–inferior sequence. The axial slices are arranged from dorsal (left) to ventral (right). Statistical map thresholds are P < 0.005 (uncorrected, paired test). Minimum cluster size is 20 voxels. Right (R) and left (L) sides are indicated. BA Brodmann area; ACC anterior cingulate cortex