Grays assertion about the fibers which connect the two brain hemispheres and carry information between them begs the question, “Is he right?
The Gendered Society, Michael Kimmel says that while one study showed that the splenium, a subregion of the corpus callosum, was found by one researcher to be significantly larger and more bulbous in shape in females, subsequent research has failed to confirm this finding (p. 33). Indeed, in magnetic resonance imaging (MRI) tests on living men and women, no differences were found between the sexes. Jonathon Beckwith, professor of microbiology and molecular genetics at Harvard Medical School argues that even if scientists did find differences, there is no way at this time that they could make a connection between brain structure and behavior pattterns. So if the evidence for women’s larger corpus callosum is so skimpy, why does “Dr” Gray act like it’s a fact? Brain researcher Marcel Kinsbourne suggests it’s because of anti-feminist backlash: “It seems that if sex differences do not exist, then they have to be invented.
