Figure 2. Image of statistic parametric mapping for the contrast (A) voluntary movements of the healthy hand relative to rest.

Brain responses showed activation of M1, SMA, and premotor areas when moving the healthy hand. (B) When voluntary moving the alien hand, M1 and other areas showed significant activations (see table 1 for details). The figure shows activation of the contralateral M1. (C) Alien movements could be elicited by experimenter's stimulation (see text for further explanation). The figure demonstrates activation of M1 and IFG when alien movements were evoked (see circles) (relative to stimulation of the healthy hand). Stimulation of the healthy hand revealed no significant brain areas (relative to the stimulation of the alien hand). Areas of significant fMRI signal change are shown as color overlays on the T1-MNI reference brain.