New Scientist Women's orgasms are a turn-off for the brain - News
As the women were stimulated, activity rose in one sensory part of the brain but fell in the amygdala and hippocampus, areas involved in alertness and anxiety. During orgasm, activity decreased in many more areas of the brain.
The findings appear to confirm what we already know: that women cannot enjoy sex unless they are relaxed and free from worries and distractions. Looked at from an evolutionary point of view, it could be that the brain switches off the emotions during sex because at such times reproduction and survival of the species become more important than survival of the individual.
The team has already done a similar study with 11 men, which revealed far less deactivation during orgasm than in women. However, Holstege says the results are probably unreliable because PET scanners measure activity over 2 minutes - and in men it's all over in a few seconds.
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