(submitted by BigBad)
Different areas of women's brains affected during sex
COPENHAGEN - Women may be able to fool their partners by faking an orgasm but a brain scanner will catch them out every time, a conference heard on Monday.

Researchers at the University of Groningen in the Netherlands have used scans to show that different areas of the brain are stimulated during an orgasm but are not activated when a woman fakes it.

“Women can imitate orgasm quite well,” Gert Holstege told a fertility meeting on Monday. “But there is nothing really happening in the brain.”

He and colleagues took brain scans of 13 women and 11 men, aged 19-49 who had volunteered for the study, while they were being sexually stimulated by their partner and during an orgasm and compared them to images of their brains at rest.

“We wanted to know what the brain was doing during orgasm,” Holstege said.

When women genuinely achieved an orgasm, areas of the brain involved in fear and emotion were deactivated. Those areas stayed alert however when women were faking it.

The researchers also found that the cortex, which is linked with consciousness, is active during a fake orgasm but not during the real thing.

Women’s orgasms may be influenced by genes

“The deactivation of these very important parts of the brain might be the most important thing necessary to have an orgasm,” said Holstege.

“It means that if you are fearful or at a very high level of anxiety, then it is very difficult to have sex because you really have to let yourself go,” he added.

Male brains affected differently
The brain scans for men during orgasm were less conclusive, according to Holstege.

But they did show that different parts of the male and female brain are activated and deactivated during sexual stimulation.

The researchers found less deactivation in the males in the areas of the brain linked to emotion and fear when they were sexually stimulated.

They are now planning further studies to compared the male and female brains during orgasm.

About 5,300 delegates are attending the 4-day meeting of the European Society of Human Reproduction and Embryology.

Copyright 2005 Reuters Limited.

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