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Essay about The Homosexual Brain?

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The Homosexual Brain?

In 1992, Vice-President Dan Quayle said that homosexuality "is more of a choice than a biological situation...It is a wrong choice." (1). Quayle's statement counters the sentiment of many homosexuals that their sexual orientation is neither a lifestyle nor a personal choice, it is innate and unchangeable (2) . Is homosexuality a choice or does sexual preference have a biological basis? This question is at the forefront of academic, scientific, political, legal and media consciousness (3). The debate over homosexuality has influenced a myriad of research in finding a biological cause for differences in sexual behavior.

The quest to find a biological substrate for homosexuality resembles an earlier movement in …show more content…

Prenatal and perinatal hormones organize the components of the brain and create either a male or female brain and thereby produce male or female typical behavior (5). The most sexually dimorphic region of the brain is located in the hypothalamus. The sexually dimorphic nucleus of the preoptic area (SDN-POA) is the most differentiated portion of the brain between sexes. In humans, the SDN is twice as large in young adult men than it is in women. The SDN-POA also plays an essential role in the secretion of gonadotropin, maternal behavior, and sexual behavior in many mammals and therefore implies that it is critical in human sexual behavior. There are four cell groups located in this preoptic-anterior hypothalamic area. These four groups have been termed the Interstitial Nuclei of the Anterior Hypothalamus (INAH 1-4). Research done on these cell groups shows that the INAH-3 is about three times larger in the male brain than it is in the female brain (6). The INAH-2 is twice as large in the male brain than the female brain (6). The importance of these regions in sexual differentiation (between the sexes) led scientists to believe that sexual orientation could be on a continuum in this area of neurological research (7).

>From this previous work on the anterior hypothalamus, LeVay hypothesized that the INAH 2 or 3 would be larger in men who sexually prefer women than

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