Table 1.

Activation likelihood estimates for coordinates reported as the PAG

Function	Subjects	Experiments	peaks	MNI Coordinates
				X	Y	Z
All	2515	111	188	1	−29	−12
Acupuncture	151	8	13	0	−28	−12
Autonomic	40	4	4	1	−38	−16
				−3	−38	−6
Bladder	651	9	25	1	−25	−12
Emotion	649	30	55	1	−29	−11
Pain	703	40	69	1	−29	−10
Placebo	153	6	13	−1	−33	−15
Rectal	186	8	10	0	−29	−10
				1	−26	−29