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 Monday.New research indicates that parts of the brain that govern fear and anxiety are switched off when a woman is having an orgasm. In the first study to map brain function during orgasm, scientists from the Netherlands also found that as a woman climaxes, an area of the brain that governs emotional control is also heavily deactivated."The fact that there is no deactivation in faked orgasms means a basic part of a real orgasm is letting go. Women can imitate orgasm quite well, as we know, but there is nothing really happening in the brain,” said neuroscientist Gert Holstege, presenting his findings Monday at the annual meeting of the European Society of Human Reproduction and Embryology.