Journal
FRONTIERS IN INTEGRATIVE NEUROSCIENCE
Volume 5, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fnint.2011.00057
Keywords
male brain; female brain; sexual differentiation; gender differences; sex differences
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The underlying assumption in popular and scientific publications on sex differences in the brain is that human brains can take one of two forms male or female, and that the differences between these two forms underlie differences between men and women in personality, cognition, emotion, and behavior. Documented sex differences in brain structure are typically taken to support this dimorphic view of the brain. However, neuroanatomical data reveal that sex interacts with other factors in utero and throughout life to determine the structure of the brain, and that because these interactions are complex, the result is a multi-morphic, rather than a dimorphic, brain. More specifically, here I argue that human brains are composed of an ever-changing heterogeneous mosaic of male and female brain characteristics (rather than being all male or all female) that cannot be aligned on a continuum between a male brain and a female brain. I further suggest that sex differences in the direction of change in the brain mosaic following specific environmental events lead to sex differences in neuropsychiatric disorders.
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