Lead author Gert Holstege has interpreted this as evidence that at the moment of orgasm, perception of fear and ability to control impulses are both shut down entirely.But there could be other explanations, especially since PET scans measure brain activity over the course of several minutes.In it, researchers asked participants to write down descriptions of what it felt like to have an orgasm.Then they removed all mention of specific body parts and asked a panel of 70 psychologists, sex therapists, and gynecologists to identify whether each description was written by a man or a woman.
Other labs have used PET scanners and other techniques to see what's going on inside the brain of someone having one.
Areas of the sensory cortex that respond to stimulation to the clitoris, cervix, and vagina.
(Komisaruk et al 2011) From there, however, a number of seemingly unrelated brain areas — such as the limbic system (involved in memory and emotions), the hypothalamus (involved in unconscious body control), and the prefrontal cortex (involved in judgment and problem solving) — join in, with one after another showing heightened levels of activation.
This even includes heightened activity in the sensory cortex, the area that primarily responds to touch.
"Just thinking about stimulation, it turns out, is a very potent way of stimulating this region," he says.