Table 5.

Within-subject analysis—differences between functional runs without spontaneous facial expressions and runs with intentionally communicated facial expressions of pain in the non/low-expressive individuals (N = 13)

Brain area	Coordinates			Local peak t value
	x	y	z
Targets of the “expression suppression” areasa
Middle frontal gyrus	31	55	0	4.64
	−21	52	7	4.73
MPFC/perigenual ACC	0	45	−3	6.05
	3	24	−7	5.86
	−3	34	−7	5.95
Motor-related structures
Caudate nucleus	7	10	−3	4.54
Other areas
Superior temporal gyrus	62	−14	−3	4.97
Middle temporal gyrus	65	−14	−14	4.17
Precuneus	41	−72	34	3.96
	−41	−72	37	5.05
Motor-related structuresb
M1	58	0	37	5.47
	−45	−17	41	5.44

Global search threshold: T = 3.93, p = 0.001 (uncorrected).

^aSpontaneous nonexpression > intentionally communicated expression.

^bIntentionally communicated expression > spontaneous nonexpression.