Re: A lady's prerogative: the feminism thread
These are some selected quotes from a journal article that I have partially scanned.
Infant studies that have looked at differences in the brains of males and females have focused on:
(1) Total brain size: In adults, the average brain weight in men is about 11-12% MORE than the average brain weight in women. Men's heads are also about
2% bigger than women's. . This is due to the larger physical stature of men. Male’s larger muscle mass, and larger body size require more neurons to control
them. This does not suggest that due to the larger brain, males are smarter than females.
(2) Cell number: men have 4% more brain cells than women , and about 100 grams more of brain tissue. this may explain why women are more prone to dementia
(such as Alzheimer's disease) than men, because although both may lose the same number of neurons due to the disease, "in males, the functional reserve
may be greater as a larger number of nerve cells are present, which could prevent some of the functional losses."
(3) Cellular connections: while men have more neurons in the cerebral cortex, women have a more developed neuropil, or the space between cell bodies,
which contains synapses, dendrites and axons, and allows for communication among neurons .
(4) Corpus callosum: it is reported that a woman's brain has a larger corpus collusum, which means women can transfer data between the right and left
hemisphere faster than men. Men tend to be more left brained, while women have greater access to both sides.(
(6) Language: two areas in the frontal and temporal lobes related to language (the areas of Broca and Wernicke) were significantly larger in female infants, thus providing a biological reason for women's notorious superiority in language-associated thoughts. For males, language is most often just in the dominant hemisphere
(usually the left side), but a larger number of females seem to be able to use both sides for language. This gives them a distinct advantage.
Taken from Hallbarry, K. (2006), A review of Sex diffrences, Journal of H uman Neurology. Vol. 22 101-119.
If you will notice from my previous post, however, I indicated, as research has demonstrated, that environmental factors play an additional role. only children, regardless of sex, typically have larger languange centers, then households with multiple children. Typically observations, even taken through cameras in the hospital, demonstrate that mothers usualy talke more to their first born then to another child. So, please don't conclude that I'm saying that nuture is the main colperate here, I was attempting to respond to an earlier post demonstrating the complex dance between hormones, biology, and environment.