Fig. 2: The gray matter volume is increased in specific cerebral areas in patients in the Pain group than that in the Control group.

Regions with increased gray matter (M1, SMA, and PCC) in the Pain group are superimposed on a normalized structural cerebral image. The color bar represents the t-score. Coordinates (X, Y, and Z values) are given in the Montreal Neurological Institute (MNI) space.