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Neuroscience of sex differences
Neuroscience of sex differences is the study of the characteristics of the brain that separate the male brain and the female brain. Unlike sexual characteristics, which are the physical qualities that separate the two sexes of an organism, the neurological differences are not visually apparent and therefore hard to study. Psychological sex differences are thought by some to reflect the interaction of genes, hormones and social learning on brain development throughout the lifespan. Some evidence from brain morphology and function studies indicates that male and female brains cannot always be assumed to be identical from either a structural or functional perspective, and some brain structures are sexually dimorphic.〔
==History==
Ideas of differences in the male and female brain circulated during the time of ancient Greek philosophers around 850 B.C. Aristotle claimed that males did not "receive their soul" until 40 days post-gestation and females did not until 80 days. In 1854, Emil Huschke discovered that "the frontal lobe in the male is all of 1% larger than that of the female." As the 19th century progressed, scientists began researching sexual dimorphisms in the brain significantly more. Until around 21 years ago, scientists knew of several structural sexual dimorphisms of the brain, but they did not think that sex had any impact on how the human brain performs daily tasks. Through fMRI and PET scan studies a great deal of information regarding the differences between male and female brains and how much they differ in regards to both structure and function has been uncovered.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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