Dimorphic behavior and cognition

Sexual differences in the structure and functions of the human brain have been the subject of much speculation ever since the time of Greek antiquity. Aristotle, designated the moment at which the male fetus receives its soul at the 40th day of gestation, whereas the female fetus was supposed to become antimated only six weeks later, around the 80th day of pregnancy. In the course of 19th century, the interest in the sexual dimorphism of the human brain grew rapidly. The first studies reported that the male brains were larger and more asymmetrical than the female brains and that men had relatively more brain substance in front of the central sulcus than behind. The existence of these comparatively minor nad seemingly random morphological sex differences in the human brain were often used in support of the biological view of that era, that men were intellectually superior to women nad that white upperclass people were superior to the other races and lower classes.