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GENDER & SEXUAL ORIENT-
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More Sex Differences in the Brain
There are other sex-related anatomical differences in the brain. Neuroanatomists have documented such sexual dimorphism in the corpus callosum and the anterior commissure. The corpus callosum is the nerve bundle connecting the two brain hemispheres, and it tends to be relatively larger in females.
 (image thanks to this site on brain anatomy
The anterior commissure, another nerve pathway between the brain's two halves, also tends to be larger in females. The fact that both the corpus callosum and the anterior commissure are larger in volume in women than in men suggests that perhaps the two cerebral hemispheres are more richly connected in women. We see the possible results of this difference when we discuss the idea that women tend to have greater verbal fluency and other such cognitive differences than men.
On the other hand, part of the amygdala--an almond-shaped area near the hypothalamus that is thought to play a role in sexual arousal--is larger in males than in females.
 What else??
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