Sexual orientation and the size of the anterior commissure in the human brain

摘要: The anterior commissure, a fiber tract that is larger in its midsagittal area women than men, was examined 90 postmortem brains from homosexual heterosexual and women. plane of the commissure men 18% 34% men. This anatomical difference, which correlates with gender sexual orientation, may, part, underlie differences cognitive function cerebral lateralization among Moreover, this finding difference structure not known to be related reproductive functions supports hypothesis factors operating early development differentiate sexually dimorphic structures brain, including global fashion.