TABLE 3.

Significant reductions in evoked brain responses to cutaneous heat pain in the PDM group (menstrual phase).

Regions of reduced response	BA	Cluster size (voxels)	t score	z score	Peak MNI coordinate
					x	y	z
Left precuneus	7/31	589	3.81	3.58	−10	−48	48
Right precuneus/posterior cingulate	31/7	255	3.79	3.56	12	−62	34

BA, Brodmann area; MNI, Montreal Neurological Institute; PDM, primary dysmenorrhea.