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A difference in hypothalamic structure between heterosexual and homosexual men.
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A difference in hypothalamic structure between heterosexual and homosexual men.

Author: S LeVay Affiliation: Salk Institute for Biological Studies, San Diego, CA 92186.
Edition/Format: Article Article : English
Publication:Science (New York, N.Y.) 1991 Aug 30; 253(5023): 1034-7
Summary:
The anterior hypothalamus of the brain participates in the regulation of male-typical sexual behavior. The volumes of four cell groups in this region [interstitial nuclei of the anterior hypothalamus (INAH) 1, 2, 3, and 4] were measured in postmortem tissue from three subject groups: women, men who were presumed to be heterosexual, and homosexual men. No differences were found between the groups in the volumes of  Read more...
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Details

Document Type: Article
All Authors / Contributors: S LeVay Affiliation: Salk Institute for Biological Studies, San Diego, CA 92186.
ISSN:0036-8075
Language Note: English
Unique Identifier: 121655996
Awards:

Abstract:

The anterior hypothalamus of the brain participates in the regulation of male-typical sexual behavior. The volumes of four cell groups in this region [interstitial nuclei of the anterior hypothalamus (INAH) 1, 2, 3, and 4] were measured in postmortem tissue from three subject groups: women, men who were presumed to be heterosexual, and homosexual men. No differences were found between the groups in the volumes of INAH 1, 2, or 4. As has been reported previously, INAH 3 was more than twice as large in the heterosexual men as in the women. It was also, however, more than twice as large in the heterosexual men as in the homosexual men. This finding indicates that INAH is dimorphic with sexual orientation, at least in men, and suggests that sexual orientation has a biological substrate.

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