Table 2. Within-group comparisons in brain regions differentially activated for the simple main effects.

Anatomical region	BA	Voxels	Side	MNI coordinates			Z score
				x	y	z
Gelotophobics (hostile type > non-hostile type)
Superior frontal gyrus (dlPFC)	8	128	R	30	20	52	4.44
Inferior frontal gyrus (vlPFC)	46	36	L	−48	42	12	4.14
Inferior frontal gyrus (vlPFC)	45	24	R	50	16	16	4.08
Caudate body (dorsal striatum)	—	38	L	−8	0	12	3.63
Gelotophobics (non-hostile type > hostile type)
Caudate tail	—	74	R	36	−46	8	5.20
Caudate tail	—	43	L	−38	−46	8	4.29
Non-gelotophobics (hostile type > non-hostile type)
Middle frontal gyrus (dlPFC)	9	113	R	40	16	36	5.92
Middle frontal gyrus (vlPFC)	10	34	R	32	60	6	4.74
Insula	47/13	21	R	30	20	−4	4.94
Insula	13	21	L	−32	22	6	3.88
Non-gelotophobics (non-hostile type > hostile type)
Anterior cingulate cortex (dACC)	32	106	L	−18	36	20	6.17
Amygdala	—	56	R	22	−10	−12	5.72
Midbrain (substantia nigra)	—	181	R	14	−24	−8	5.58
Insula	13	28	R	30	−32	20	5.29
Anterior cingulate cortex (vACC)	32	87	R	10	26	−6	5.00
Midbrain (subthalamic nucleus)	—	63	L	−12	−12	−8	4.85
Amygdala	—	40	L	−22	−10	−12	4.52
Midbrain (medial geniculate body)		46	L	−20	−24	−6	4.43
Inferior frontal gyrus (vlPFC)	46	12	L	−36	36	14	4.31
Orbitofrontal cortex (OFC)	47	13	L	−32	32	−16	4.13
Nucleus accumbens (NAcc)	—	39	L	−4	0	−4	3.55

The activation threshold for the simple main effects was set at p < 0.05 FWE (family-wise error rate) for multiple comparisons using predefined ROIs for each type of joke. dlPFC = dorsolateral prefrontal cortex; vlPFC = ventrolateral PFC; vmPFC = ventromedial PFC; vACC = ventral anterior cingulate cortex; dACC = dorsal ACC.