Table I.
Comparing brain activation of men and women during sexual genital stimulation
Side | Brain regions | BA | Voxels | x | y | z | t |
---|---|---|---|---|---|---|---|
Common activations for men and women | |||||||
L | Inferior parietal lobule (SII) | 40 | 142 | −54 | −22 | 28 | 3.84 |
L | Postcentral gyrus (SI) | 3 | 40 | −20 | −38 | 64 | 3.69 |
Common deactivations for men and women | |||||||
R | Amygdala | − | 379 | 20 | −2 | −24 | 4.88a , b |
R | Fusiform gyrus | 20 | 75 | 40 | −20 | −32 | 4.29 |
L | Fusiform gyrus | 20 | 526 | −54 | −32 | −28 | 4.06b |
R | Middle temporal gyrus | 21 | 68 | 54 | 10 | −20 | 3.72 |
L | Inferior temporal gyrus | 37 | 24 | −56 | −62 | −16 | 3.57 |
Men > women | |||||||
R | Claustrum | – | 121 | 32 | −18 | −4 | 4.61a , b |
L | Cerebellar vermis, posterior lobe | – | 56 | −10 | −80 | −16 | 4.11 |
R | Middle temporal gyus (VOT) | 37 | 82 | 58 | −64 | −2 | 4.07b |
L | Cerebellar vermis, Posterior lobe | – | 101 | −12 | −82 | −36 | 3.70 |
Women > men | |||||||
L | Inferior parietal lobule (posterior parietal cortex) | 40 | 367 | −34 | −56 | 44 | 4.90a |
L | Postcentral gyrus (somatosensory area 2) | 2 | 349 | −52 | −24 | 40 | 4.64a , b |
L | Precentral gyrus/middle frontal gyrus (MI/PMC) | 4/6 | 484 | −40 | −24 | 62 | 4.54a |
R | Middle frontal gyrus (PMC) | 6 | 210 | 30 | 6 | 64 | 4.35c |
R | Middle frontal gyrus (PMC) | 6 | 121 | 4 | −8 | 52 | 4.01 |
R | Inferior parietal lobule (posterior parietal cortex) | 40 | 26 | 48 | −70 | 40 | 3.48c |
L | Precuneus | 7 | 21 | −20 | −74 | 46 | 3.37 |
Within‐gender, brain activation during sexual genital stimulation was compared to brain activation of a non‐sexual passive resting state (STIM vs. REST). Gender commonalities were found by conjunction and gender differences by mutual subtraction of these within‐gender T contrasts. The statistical threshold for brain regions listed in the table is P < 0.001, uncorrected for multiple comparisons (t = 3.15). Coordinates refer to the MNI (Montréal Neurological Institute) coordinate system.
Cluster with peak voxel value of P FWE < 0.05.
Region included in a priori hypothesis.
Region symmetrical to contralateral region with P FWE < 0.05.
BA, Brodmann's area; P FWE, family‐wise error corrected for multiple comparisons; L, left hemisphere; PMC, premotor cortex; R, right hemisphere; t, t value; SII, secondary somatosensory cortex; VOT, ventral occipitotemporal cortex; x, distance (mm) relative to midsagittal plane (+, right; −, left); y, distance (mm) relative to anterior commissure (+, anterior; −, posterior); z, distance (mm) relative to intercommissural line (+, dorsal; −, ventral).