Table 2.

Stereotaxic (Montreal Neurological Institute) coordinates of increases and decreases in rCBF during ejaculation compared with penile stimulation

		Coordinates
Side	Brain region	x	y	z	z-score
Activations
Brainstem
Right	Medial pontomesencephalic tegmentum	2	−28	−22	5.80
Left	Lateral pontine tegmentum	−18	−14	−34	6.69
Right	Lateral pontine tegmentum	14	−28	−30	5.28
Midline	Dorsal medulla (solitary complex)	0	−46	−50	5.48
Thalamus/midbrain
Left	Mesodiencephalic junction	−8	−24	0	7.75
Right	Mesodiencephalic junction	12	−24	0	6.53
Right	Anterior thalamus	12	−4	6	6.03
Basal ganglia
Right	Claustrum/insula	34	14	−8	6.21
Left	Claustrum/putamen	−32	6	4	6.28
Right	Claustrum/putamen	32	6	0	6.50
Right	Putamen	20	4	8	5.38
Cortical areas
Left	Inferior occipital gyrus (BA 18)	−2	−100	−4	5.20
Right	Lingual gyrus (BA 18)	4	−86	−12	6.22
Midline	Lingual gyrus (BA 18)	0	−92	−6	5.74
Right	Precuneus/post. cingulate (BA 31/23)	16	−62	24	6.38
Right	Precuneus (BA 7)	8	−54	50	6.05
Right	Supramarginal gyrus (BA 40)	52	−48	28	7.70
Right	Inferior parietal lobule (BA 40)	28	−38	50	5.39
Right	Paracentral lobule (BA 5)	18	−26	58	5.93
Right	Frontal dorsal gyrus (BA 6)	16	4	60	5.88
Left	Superior/medial frontal gyrus (BA 6)	−30	−4	64	5.61
Right	Superior temporal gyrus (BA 39)	54	−60	36	7.05
Right	Temporal operculum (BA 42)	52	−28	12	6.20
Right	Inferior temporal gyrus (BA 20/21)	64	−6	−32	6.33
Right	Insula	44	14	12	5.54
Right	Inferior frontal gyrus (BA 47)	54	44	−12	7.03
Right	Inferior frontal gyrus (BA 47)	56	38	−6	6.71
Cerebellum
Left	Deep cerebellar nuclei	−6	−44	−24	5.88
Left	Deep cerebellar nuclei	−8	−52	−30	5.31
Left	Vermis	−4	−88	−28	5.33
Right	Vermis	2	−58	−4	6.61
Right	Vermis	2	−66	−32	6.47
Left	Hemisphere	−34	−58	−40	7.38
Left	Hemisphere	−30	−84	−34	7.19
Right	Hemisphere	32	−68	−46	6.55
Deactivations
Left	Entorhinal cortex	−16	0	−38	4.34
Left	Entorhinal cortex	−18	10	−32	3.91
Left	Amygdala	−18	2	−24	3.34

The height threshold for activations was t = 6.09 (p < 0.01; corrected for multiple comparisons) and for deactivations t = 3.21 (p <0.001; uncorrected for multiple comparisons; extent threshold 8 voxels). Activations and deactivations are reported in the table as z-scores (conversion of t statistics to normal distribution). After transformation to Talairach coordinates, the cortical regions were identified using the Talairach atlas (Talairach and Tournoux, 1988). The thalamic and rostral midbrain structures were identified according to the stereotactic atlas of the human brain by Mai et al. (1997).