Brain activation and sexual arousal in healthy, heterosexual males
14 heterosexual right-handed males ages 18-30 had MRIs performed while their penis’s hydraulic pressures were measured when watching video clips of relaxing, sports, and erotic scenes.
Fig. 4 Turgidity‐correlated brain activations obtained from a random effects analysis of 11 subjects. Red–yellow colour scale indicates regions that exhibit significant correlations with behavioural measures of penile turgidity. These colour maps have been superimposed on the average T2‐weighted and stereotaxically normalized brain volume. (A) SPM99 surface reconstruction depicting projections of activations on the right side of the brain. (B) Axial section depicting the largest brain activation observed in this experiment in the right insula and claustrum. (C) Axial section illustrating activation in left caudate/putamen and right middle temporal/middle occipital gyri (BA 37/19). (D) Axial section depicting cingulate gyrus activation. (E) Coronal section illustrating activation in the right hypothalamus.
From BRAIN: A journal of Neurology, Volume 125, Issue 5, 05 May 2002, pages 1014-1023 by authors Bruce A. Arnow, John E. Desmond, Linda L. Banner, Gary H. Glover, Ari Solomon, Mary Lake Polan, Tom F. Lue and Scott W. Atlas