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Clue to sexual attraction discovered in lesbian brain

Lesbian and women that are heterosexual differently to particular individual odours, a brain-scanning research has discovered. The homosexual ladies revealed brain that is similar to heterosexual guys if they inhaled particular chemical substances, that might be pheromones, the scientists say.

“But our research can’t answer questions of cause and effect, ” cautions lead researcher Ivanka Savic during the Karolinska Institute in Stockholm, Sweden. “We can’t state perhaps the distinctions are as a result of pre-existing variations in their minds, or if previous intimate experiences have actually trained their minds to react differently. ”

Savic and her peers asked 12 lesbian females and 12 heterosexual females to breathe focused samples of two steroids: EST, that is produced by oestrogen and discovered within the urine of women that are pregnant; and plus, that will be produced by progesterone and discovered in men’s armpit perspiration.

Positron emission tomography (animal) scans revealed which regions of the women’s brains answered to each chemical. If the heterosexual females smelled AND their brains showed activity into the hypothalamus that is anterior an area of this mind considered to process intimate cues. But EST just produced task when you look at the olfactory area of these minds, the area that processes smells.

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The lesbians, nevertheless, just showed task into the region that is olfactory odour they smelled.

Intimate choice

The scientists conclude why these “pheromone-like stimuli” produce various reactions within the anterior hypothalamus of women of different intimate orientations, and that their research supports the theory that the anterior hypothalamus plays a part in intimate choice.

The pattern of task within the minds of lesbians both for chemical substances had been that is similar perhaps not identical – to your pattern for heterosexual guys. ادامه مطلب »



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