Fig. 6.

Activation in the thalamus. A, Group activation. Activation in the contralateral thalamus is shown after a noxious thermal stimulus to the V3 region of the face.B, Face and thumb activation. Activation is shown in the contralateral thalamus after stimulation to the face and hand. Thewhite areas show regions of common activation after thermal stimulation to the V1, V2, and V3 distributions of the face in regions defined as the DM and VPM nuclei. Activation of the thumb is mapped onto the same anatomical section (purple circle) and corresponds to the VPL nucleus. The regions are defined anatomically using the atlas of Talairach and Tournoux (1988). Time courses of activation for each area are shown in theinsets. Percent signal change is shown in arbitrary units (a.u.); numbers in thebottom corners indicate the Talairach coordinates in the rostrocaudal (z) axis.