Another example in addition to those you cite in your post is that the corpus callosum (fibers that connect the two hemispheres in the brain) tends to be thicker in women than in men.

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Four different studies done in the past decade using MRI (magnetic resonance imaging) all found a slight reduction in the size of four regions of the brain: the corpus callosum, the basal ganglia, the frontal lobes, and the cerebellar vermis.

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