2002 September 19 Thursday
Women have bigger brain area for aggression control

Evidence for the neurological basis for sexual differences in rate of violent behavior:

Philadelphia, PA -- There is a sound neurological basis for the cliché that men are more aggressive than women, according to new findings by scientists at the University of Pennsylvania School of Medicine. Using magnetic resonance imaging (MRI) scans, the Penn scientists illustrated for the first time that the relative size of the sections of the brain known to constrain aggression and monitor behavior is larger in women than in men.

The orbital frontal cortex tries to keep the amygdala in line:

Once the scientists adjusted their measurements to allow for the difference between men and women in physical size, they found that the women's brains had a significantly higher volume of orbital frontal cortex in proportion to amygdala volume than did the brains of the men.

Share |      By Randall Parker at 2002 September 19 11:45 AM 

claire said at June 9, 2007 10:08 PM:

Why do scientists keep bringing things down to 'size'? Elephants have bigger brains than humans but it doesn't make them more intelligent. IQ tests are still being designed using masculine views of what intelligence is and how to 'measure' it. Why is size deemed so definitive?

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