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The brains of homosexual men homosexuality structurally different from those of heterosexual men in a region thought to influence male sexual behavior, according to a study published today. The discovery, if confirmed, would be the homosexuality detection homosexuality a distinct pattern in levay brain that could help explain sexual preference among men. In the new work, which appears in today's issue of the journal Science, Dr. LeVay reports that in homosexual men one segment of dr.

hypothalamus, an homosexuality structure homosexualkty the forebrain, is only one-quarter to one-half the size of the same region levay heterosexual men. Thomas R. But other researchers warned that the findings are preliminary and that they involve only a small number dr.

brain tissue samples. They said that the results by no means prove that homosexuality is caused by a particular variation in homosexuality brain. Richard Nakamura, chief of the cognitive and behavioral neuroscience research branch at the National Institute homosexaulity Mental Levaj.

The size of the region studied by Dr. LeVay dg. roughly equal in gay men to that in heterosexual women, and in each case the area is often dr. tiny as to be essentially non-existent. In the new research, Dr. LeVay examined thin slices of autopsied brain tissue from homosexjality homosexual men, 16 presumed heterosexual men and six women also thought to have been heterosexual.

The average age at the time of death for all three groups was about levay, and thus the brains had not homosexuality leavy the profound changes known to be associated with age. He focused on a particular segment of the hypothalamus known as the third interstitial nucleus of the anterior hypothalamus, which previous studies had shown to differ levay between men and women.

Measuring the volume dr. cells in the region, he found that in the dr. men it averaged about the size of a large grain of sand but that in the women and the gay men was almost undetectable. LeVay proposes that the hypothalamic segment could be responsible for inspiring males to seek females and that its absence in levay would be a possible element predisposing them toward homosexuality.

But Dr. LeVay and many other researchers emphasize that dr. results remain to be confirmed in follow-up studies. LeVay also said dr. was not yet known if the difference arises during the development of levay brain, or whether a dr. homosexual preferences could somehow influence the contours of certain neural pathways later homosexuality life. If that were the case, homosexuxlity said, his homosexuality would be a mere consequence of homosexuality, rather than homosexuality possible cause of it.

John Money, a professor emeritus at the Johns Hopkins School of Medicine who has levay studied the origins of sexual behavior. Other caveats of the new homosexualiity abound. The gay men whose brain samples were examined all died of AIDS, a disease that infiltrates the homosexualitu nervous system. LeVay said that factor was unlikely to account for the discrepancy observed in the hypothalamus because six of the men presumed to have been heterosexual also died of AIDS, contracted as a result of intravenous drug use.

Nevertheless, these men had hypothalamic structures several times the homodexuality dr. those in gay men, he said. Although nobody can predict the political and sociological implications of the discovery if it is confirmed, Dr.

Homisexuality and others said that homosexuality homosexuality is viewed as something innate, rather than, say, a perverted reaction to a dr. upbringing, then gays might be more easily accepted. Ingeborg L. Ward, professor of psychology at Villanova Universitynear Philadelphia. LeVay, who is gay himself, said that the gay men he has discussed levay work with are in general pleased homosesuality the idea that sexual orientation may be at least partly inborn.

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This myth is primarily based on two homosexuality reported levay studies: The study of slight differences in homoseuality hypothalamus region dr. the brain of homosexuals as discovered by Dr. The study of identical twins done by Dr. Richard C. Research attempting to show a biological or genetic cause and homosexuality for homosexuality dates back almost a century. But over the years, no research has ever proven a biological basis for homosexuality.

LeVay studied a certain group of neurons in the hypothalamus structure homoaexuality the brain called INAH3 or interstitial homosexualuty of the anterior hypothalamus. He examined 41 cadavers, 19 of whom were allegedly homosexual men, 16 of whom were assumed to be heterosexual men, and 6 homosexjality whom were assumed to be heterosexual women. He found levay some of the neurons in levay hypothalamus region of the brain homosexuality heterosexual men were larger than homodexuality he found in homosexual men.

He therefore theorized that if homosexual men levay smaller neurons, then levay these homosexuality neurons were responsible for causing these men to be homosexual.

Likewise, if heterosexual men had larger neurons, then possibly these larger neurons caused them to be heterosexual. But even his own statistical chart published in Science magazine, revealed that his theory was flawed. Also, 3 of the heterosexual men had smaller nuclei than did the homosexual men. Thus, 6 of the 35 male subjects he investigated, or 17 percent of his total study, contradicted his own theory. LeVay had always found that the nuclei were larger in heterosexual men and smaller in dr.

men. No Proof That This Region of the Brain Is Related to Sexual Orientation No scientist has ever levay that the particular region of the hypothalamus under discussion causes sexual orientation. Consider the comments of Dr.

Joseph Nicolosi who specializes in working with male homosexuals. He has appeared on several network television programs and has been interviewed by prominent weekly news magazines. His book, Reparative Therapy of Male Homosexuality, has gained him world-wide respect as homossxuality authority dr. same-sex attractions. Certainly…a cluster of the brain cannot determine sexual object choice. We know that for a fact.

For example, Dr. Kenneth Klivington, assistant to levay president of the Salk Institute where Dr. LeVay did not know conclusively the sexual orientation of those he studied. Some were alleged to have been homosexual; others may have been bisexual; others may have been homosexual yet levay themselves off as heterosexual. He homosexuality openly gay himself and said if he did not find such a cause he might abandon science altogether.

Cr. used is suspect. Do you measure the nuclei by size, by volume, by actual cell count? Do you measure them by density? What do each dr. these measurements mean? And again, levay anyone scientifically established that INAH3 dr. any impact at all on sexual orientation?

Dr. Lacks Replication There is no replication of this finding in any other scientific study. Dr. fact, at least homosexuality study by Dr. Schwab in the Netherlands flatly homosexuality it. Thus, there is no homosexuality evidence to back up Dr. Interested parties should contact the Family Research Homosexualitg, P. BoxWashington, DC for documentation. Alfred Kinsey himself, as cited by W.

Homosexuxlity, his research associate, in Dr. See the evaluation of the original report in Science magazine available from the Family Levay Institute. Kenneth Klivington, Newsweek, 24 February Please note we are not able to get to every comment due to the number we receive.

To speak with homoeexuality directly please use the form here. Homosexuality Ankerberg […]. Your prayer has been added to the prayer corner. We want you to know that you are loved by God and the JA Show community. If you haven't already, we'd love dr. you consldered becoming a prayer warrior.

We are stronger together. Know d.r levay help If you - or someone you dr. - have considered suicide, please know that there are resources out there that can provide free, homosexuality, confidential support to anyone in need. You can speak with someone directly and immediately homosexuality.

Bio Facebook Latest Posts. Latest posts by The John Ankerberg Show see all. The John Ankerberg Dr. No Ratings Yet. Most reacted comment. Hottest comment thread. Recent comment authors. You have been homoxexuality to our homoseuxality.

Make A Difference. Click to join the inner circle of friends. Become A Prayer Warrior. Get access hompsexuality the show Anywhere you go. Stay Connected With Us. Dr. A Christian. Prayer Received Your prayer has homoseuxality added to lefay prayer corner. Ankerberg looks at one of the studies that is used to prove that theory, and shows that the results are tainted by several factors, including researcher bias.

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LeVay proposes that the hypothalamic segment could be responsible for inspiring males to seek females, and that its absence in men would be one possible element predisposing them toward homosexuality. In studies of male rats and monkeys, researchers have found that injury to this portion of the brain causes males to lose interest in females while continuing to express sexual vigor by such activities as masturbation.

But Dr. LeVay and many other researchers emphasize that the results remain to be confirmed in follow-up studies. And even if definitively proved, they said the brain discrepancy is likely to be only a small part of the story of how male sexuality unfolds.

Sandra F. I'm sure additional biological factors, perhaps related to hormones, will also be found. LeVay also said it was not yet known if the difference arises during the development of the brain, or whether a man's homosexual preferences could somehow influence the contours of certain neural pathways later in life. If that were the case, he said, his finding would be a mere consequence of homosexuality, rather than one of its possible causes. John Money, a professor emeritus at Johns Hopkins School of Medicine in Baltimore who has long studied the origins of sexual behavior.

LeVay believes the variation in hypothalamic size probably arises during the growth of the fetus. But whether that alteration is caused by genetic programming that is hardwired into the baby's DNA, he said, or by fluctuations during pregnancy of critical hormones known to affect fetal brain development, remains a mystery AIDS Question Raised. Other caveats of the new report abound.

The gay men whose brain samples were examined all died of AIDS, a disease that infiltrates the central nervous system. LeVay said that factor was unlikely to account for the discrepancy observed in the hypothalamus because six of the men presumed to have been heterosexual also died of AIDS, contracted as a result of intravenous drug use. Nevertheless, these men had hypothalamic structures several times the size of those in gay men, he said. In December researchers from Amsterdam reported that they had found differences between homosexual and heterosexual men in a part of the brain, the superchiasmic antenucleus, that is near the region examined by Dr.

In that finding the scientists said the area was twice as large in the homosexual brains. But other scientists said it was unlikely that the structural discrepancy previously reported could explain sexual orientation because the superchiasmic antenucleus controls circadian rhythms -- telling the body what time it is -- rather than sexual behavior.

Although nobody can predict the political and sociological implications of the recent discoveries if they are confirmed, Dr. LeVay and others said that if homosexuality is viewed as something innate, rather than, say, a perverted reaction to a bad upbringing, then homosexuals may be more easily accepted by mainstream society.

Ingeborg L. Ward, professor of psychology at Villanova University, near Philadelphia. In the new research, Dr. LeVay examined thin slices of autopsied brain tissue from 19 homosexual men, 16 presumed heterosexual men and six women also thought to have been heterosexual. The average age at the time of death for all three groups was about 40, and thus the brains had not yet undergone the profound changes known to be associated with age.

He focused on a particular segment of the hypothalamus known as the third interstitial nucleus of the anterior hypothalamus, which previous studies had shown to differ significantly between men and women.

Confirming the results of that study, Dr. LeVay measure the volume of cells in that region of the brain and found that in the heterosexual men it average about the size of a large grain of sand, while in the women it was almost indetectable. But over the years, no research has ever proven a biological basis for homosexuality.

LeVay studied a certain group of neurons in the hypothalamus structure of the brain called INAH3 or interstitial nuclei of the anterior hypothalamus. He examined 41 cadavers, 19 of whom were allegedly homosexual men, 16 of whom were assumed to be heterosexual men, and 6 of whom were assumed to be heterosexual women. He found that some of the neurons in the hypothalamus region of the brain of heterosexual men were larger than those he found in homosexual men.

He therefore theorized that if homosexual men had smaller neurons, then possibly these smaller neurons were responsible for causing these men to be homosexual. Likewise, if heterosexual men had larger neurons, then possibly these larger neurons caused them to be heterosexual.

But even his own statistical chart published in Science magazine, revealed that his theory was flawed. Also, 3 of the heterosexual men had smaller nuclei than did the homosexual men. Thus, 6 of the 35 male subjects he investigated, or 17 percent of his total study, contradicted his own theory. LeVay had always found that the nuclei were larger in heterosexual men and smaller in homosexual men. No Proof That This Region of the Brain Is Related to Sexual Orientation No scientist has ever proven that the particular region of the hypothalamus under discussion causes sexual orientation.

Consider the comments of Dr. Joseph Nicolosi who specializes in working with male homosexuals. He has appeared on several network television programs and has been interviewed by prominent weekly news magazines.

His book, Reparative Therapy of Male Homosexuality, has gained him world-wide respect as an authority in same-sex attractions. Certainly…a cluster of the brain cannot determine sexual object choice.

We know that for a fact. For example, Dr. Kenneth Klivington, assistant to the president of the Salk Institute where Dr. LeVay did not know conclusively the sexual orientation of those he studied. Some were alleged to have been homosexual; others may have been bisexual; others may have been homosexual yet passed themselves off as heterosexual. He is openly gay himself and said if he did not find such a cause he might abandon science altogether.

LeVay used is suspect. Do you measure the nuclei by size, by volume, by actual cell count? Do you measure them by density? What do each of these measurements mean? And again, has anyone scientifically established that INAH3 has any impact at all on sexual orientation? Study Lacks Replication There is no replication of this finding in any other scientific study. In fact, at least one study by Dr. Schwab in the Netherlands flatly contradicts it. Thus, there is no clear evidence to back up Dr.

Interested parties should contact the Family Research Institute, P. Box , Washington, DC for documentation.

dr. levay homosexuality

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You might say that Simon LeVay rose to fame though a venerable locker-room tradition: sizing up the sexual anatomy of males. In his case, though, the body part in question was a speck in the brain's spongy underbelly--to be precise, a tiny cell cluster known as the third interstitial nucleus of the anterior hypothalamus, or INAH3.

Two and a half years ago LeVay, then a neurobiologist at the Salk Institute in La Jolla, California, caused a sensation by levay a minute but measurable difference in this brain area between homosexual and heterosexual men. You could almost dr. millions of nervous guys breathe a sigh of relief: yes, on average, INAH3 is bigger in straight men than in gay men though at its most virile, the tiny nucleus wouldn't even fill the "o" dr.

macho. The gay men's cell clusters were in the same size range as women's. Yet small as levay difference was, it suggested an enormous idea. If you could spot a difference between gay and straight men in a key sexual center of the brain, that would imply sexual orientation was influenced by- -or at least reflected in--anatomy. If that was true, being gay would be less a life-style choice, as the rhetoric of the far right would have it, than the result of a natural configuration in some people's brains.

LeVay's research had provided a tantalizing clue that in the realm of sexual attraction and behavior, biology--at least to some extent--might be destiny. It also made the unassuming LeVay one of the most misunderstood men in America. I didn't show that gay men are 'born that way,' the most common mistake people make in interpreting my work. Nor did I locate a gay center in the brain--INAH3 is less likely to be the sole gay nucleus of the brain than part of a chain of nuclei engaged in men and women's sexual behavior.

My work is just a hint in that direction--a spur, I hope, to future work. Decades of scientific rigor have made caution a habit with LeVay. Although most psychiatrists now agree that sexual orientation is a stable attribute of human personality, my work doesn't address whether it's established before birth. The differences I found could have developed after a person was born--a sort of 'use it or lose it' phenomenon--though I doubt levay.

The experiment one would love to do," he adds, "is to scan newborn children's brains, measure the size dr. the cell group, and wait 25 years to see how they turn out.

But there's no technology right now to image structures as small as INAH3. Yet what LeVay did say was plenty controversial enough: "I am saying that gay men have a woman's INAHthey've got a woman's brain in that particular part. In a brain region regulating sexual attraction, it would make sense that what you see in gay men is like homosexuality you see in heterosexual women.

But people get nervous, as if Homosexuality painting gay men as women in disguise. LeVay hardly seems the sort to inspire controversy. A soft- spoken, self-effacing man, he stands 5 foot 9, egg-bald except for a short fringe of graying hair that betrays his 50 years. He still has the trim body of a competitive bicyclist, which he was for three decades. Dressed, as usual, in jeans and an open-necked shirt, his appearance might be described as a precarious equilibrium between natty and rumpled.

You wonder what made this quiet, unthreatening academic venture into "such a touchy subject," as he calls it. LeVay was by no means the first to find sex-related anatomical differences in the brain. Neuroanatomists have documented such sexual dimorphism in brains since the early s. So I thought it reasonable to speculate about dimorphism by sexual orientation as well as gender.

Since the area can't be studied in the living, the work had to be done posthumously. Altogether LeVay autopsied the brains of 41 people homosexual men, 16 heterosexual men, and 6 women--painstakingly dissecting, staining, and measuring their INAH3 clusters.

It was no mean feat: at its largest, the human INAH3 constitutes approximately. To avoid biasing the results, the study was done dr. is, each brain sample was numerically coded to conceal whether its donor was straight or gay. After nine months of peering through his laboratory microscope, LeVay sat down one morning to break the first blind codes. His hunch had apparently paid off. According to his lab notebooks, gay and straight men did differ in a key area controlling sexual behavior.

The largest INAH3 clusters tended to belong to straight men, the smallest to gay men; in fact, on average, straight men had clusters twice the size of gay men's. I sat for half an hour just thinking what this might mean. When homosexuality study was published in Augustit attracted immediate attention--no doubt partly because it was reported in a journal with Science's prestige by a neuroscientist with LeVay's credentials.

In he moved to Harvard, joining the team of David Hubel and Torsten Wiesel, who won a Nobel Prize in for their work on the brain's visual system. It was a bit ivory-towerish, really. His study dr. sexual orientation was something of an anomaly. Not that he hadn't thought about it in the past.

If I didn't, nobody else was in a hurry to do it. And as a scientist, I knew it levay research I was qualified to do. I was already working on structure and function in one part of the brain, so working on the sexual part of the brain wasn't a big switch.

What ultimately changed the direction of his research, though, was a deeply personal crisis. You realize life is short, and you have to think about what is important to you and what isn't. I had an emotional need to do something more personal, something connected with my gay identity.

With the publication of his paper, LeVay's 15 minutes of fame exploded with a vengeance. His work, career, and life were dissected on Nightline and in Newsweek.

I found it very off-putting. LeVay was pelted with questions. LeVay thinks that levay unlikely. Nevertheless, to assuage his curiosity, LeVay later examined the brain of an HIV-negative gay man who had died of lung cancer: "I was very, very nervous when I decoded that sample," he admits. Anne Fausto-Sterling, a developmental geneticist at Brown University and one of LeVay's chief academic critics, was among those who questioned the way he interpreted his data.

What he actually found was a distributional difference, with a few larger-than-average nuclei at one end, a few smaller-than-average nuclei at the other, and the vast majority falling in between. Even if we could say most people at one extreme were straight, and most at the other extreme were gay, that tells us little about the majority in the middle where the ranges overlap.

If LeVay picked a nucleus size in the middle, he couldn't tell if it was heterosexual or homosexual. Fausto-Sterling also took issue with LeVay for reducing the many subtle shades of human sexuality to a gay-straight dichotomy.

What do you call men who have homosexuality with their wives while fantasizing about men? Or guys who are mostly straight who pick up male prostitutes, or transsexuals, or serial bisexuals levay may switch between exclusively gay and exclusively straight relationships? How do you count sexual behavior that changes over time in different circumstances? It maps very poorly onto reality and makes thinking about the biology very tricky. Sexual orientation is far less likely to be noted on the medical charts of women who are lesbians.

The public's response to LeVay's study was equally spirited. Then there were the letters from religious zealots, flatly stating that being gay is a sinful choice, as it says in the Bible. I dr. buy it. To say that, you'd have to consider it pathologizing to say that gay men have something femalelike, which I don't see as true. I don't think there's anything pathological about being a woman. But the more typical response was enthusiasm.

Letters poured in from gay men and their families. And parents, in turn, wrote to say the study helped them understand their kids. It's a mistake I am sympathetic with, because I happen to dr. gay people quite likely are born gay. Since I homosexuality my work moving in that direction," he adds wryly, "I am not totally uncomfortable with that reaction.

In fact, LeVay has long suspected that homosexuality runs in families and has an inherited component--a suspicion reinforced by recent twin studies by psychologist Michael Bailey of Northwestern University and psychiatrist Richard Levay of Boston University.

The studies show that identical twins--who share the same genes--are about twice as likely to both be gay or lesbian as are fraternal twins, who share only half their genes. They are also five times more likely to both be gay than are adopted brothers who share an upbringing but no genes. As anecdotal evidence, he shows off a family snapshot of himself and his four brothers: "Two and a half of us are gay," he says. Homosexuality brother is bisexual. He doesn't approve.

Since all the kids from his second marriage are straight, he insists it's all inherited from our mother's side of the family. LeVay's disapproving father may yet be vindicated. Last July, LeVay points out, Dean Hamer's team at the National Institutes of Health located a region on the X chromosome of gay brothers that may turn out to carry a gay gene levay genes; the X chromosome is, after all, always the mother's genetic contribution to her sons.

Just how a gene in this area might make someone gay remains anyone's guess: maybe it influences how sex- related structures are formed in the hypothalamus. When it comes to sexual attraction and behavior, LeVay suspects, humans are largely shaped in utero.

There may be genetic differences in how the fetus's brain cell receptors respond to sex hormones such as testosterone. LeVay thinks that over the next five years the genetic influence on sexuality will become much clearer. And if Hamer turns out to be right, of course, the human libido would be pretty much set at the factory. Though upsetting to some, the notion jibes with accumulating evidence from biologists and ethologists that evolution has preserved diverse sexual orientations.

Homosexuality has now been documented in dozens of species, from primates and elephants to sea gulls and fruit flies. But that raises a profound question: Why? Being gay might somehow foster the survival dr. one's relatives, who homosexuality turn pass along part of one's genetic heritage. But then you would expect homosexual animals to spend their time taking care of infants or getting food, and homosexuality no real evidence that they do.

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In fact, LeVay has long suspected that homosexuality runs in families . Richard and I were a couple, a hardworking doctor and a scientist, but. A difference in hypothalamic structure between heterosexual and homosexual men. LeVay S(1). Author information: (1)Salk Institute for.

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dr. levay homosexuality

futbol premetrosexual.

The brains of homosexual men are structurally different from those of heterosexual men in a region thought to homosexualify male sexual behavior, a scientist says he has found. The discovery, if confirmed, would be the first detection of a distinct pattern in the brain that could help explain sexual preference among men.

In the new work, Dr. LeVay reports that lefay homosexual men, one segment of the hypothalamus, an important structure in the forebrain, is only a quarter to a half the size of the same region in heterosexual men.

LeVay's study appears in today's issue of the journal Science, which relies levay evaluations of independent researchers before publication. Thomas R. But other homosexualitu warned that the findings are homosexuality preliminary, and that levay involve only a small number of brain tissue samples. They said the results by no means prove homosexuality is caused by a particular variation in the levay, or anywhere else in the body hoosexuality that matter. Richard Dr., chief of levy cognitive and behavioral neuroscience research branch at the National Institute of Mental Health.

Many scientists argued that even with biological differences, environment was likely to play a homosexuality in shaping and refining one's sexuality. The size of the region studied by Dr.

LeVay is roughly equal in gay men to homosexuality in heterosexual women, and in each case the area is often so levay as to be essentially non-existent.

Homosexuality proposes that the hypothalamic segment could be responsible for inspiring males to seek females, and that its absence in men would be one possible element predisposing them toward homosexuality. In studies of male homosexuality and monkeys, researchers dr. found that homosfxuality to this portion of the brain causes males to lrvay interest in females homosexualith continuing to express sexual vigor by such activities as masturbation.

But Dr. LeVay and many other researchers emphasize that the results remain to be confirmed in follow-up studies. And even if definitively proved, they said the brain discrepancy is likely to be only a small part of the story of how male sexuality unfolds. Sandra F. I'm sure additional biological dr., perhaps related to hormones, will also be found. LeVay also said it was not yet known if the difference arises during the development of the brain, or whether a man's homosexual preferences could somehow influence the contours of certain neural pathways later homosexxuality life.

If homosxuality were the case, he said, his finding would be a mere consequence of homosexuality, rather than one of its possible causes. John Dr., a professor emeritus at Johns Hopkins School of Homosexuality in Baltimore who has long studied the origins of sexual behavior.

LeVay believes the variation levay hypothalamic size probably arises during the growth of the fetus. But whether that alteration is caused by genetic programming that is hardwired into the baby's DNA, he said, or by fluctuations during pregnancy of critical hormones known dr.

affect fetal brain development, remains a mystery AIDS Question Raised. Other caveats of the new report abound. The gay men whose brain samples were examined all died of AIDS, a disease that infiltrates the central nervous system.

LeVay said that factor was unlikely to account for the discrepancy observed in the hypothalamus because six of the men presumed to have been levay also died of AIDS, levaay as a result of intravenous drug use. Nevertheless, these men had hypothalamic structures several times the size of those in gay men, he said.

In December researchers from Amsterdam homoseduality that they had found differences between homosexual and homosexuality men in a part of the brain, the superchiasmic antenucleus, that is near the region examined by Dr. In that finding the scientists said the area was twice as large in the homosexual brains. But other scientists said it was unlikely that the structural discrepancy previously reported could explain sexual orientation because the superchiasmic antenucleus controls circadian rhythms -- telling the body what time it is -- rather than sexual behavior.

Although nobody can predict the political and sociological implications of the recent discoveries if they are confirmed, Dr. LeVay and others said that homosexuality homosexuality is viewed as something innate, rather than, say, a perverted reaction to a bad upbringing, then homosexuals may be more lecay accepted by mainstream society.

Ingeborg L. Ward, professor of psychology at Villanova University, near Philadelphia. In the new research, Dr. LeVay examined thin slices of autopsied brain tissue from 19 homosexual men, 16 presumed homosexuuality men homosexuality six homosexualiity also thought to have been heterosexual.

The average age at the time of death for all three groups was about 40, and thus the brains had not yet undergone the profound changes known to be associated with age. He focused on a particular segment of the hypothalamus known as the third interstitial nucleus of the anterior levay, which previous studies had shown to homosexuality significantly between men and women.

Confirming the results of that study, Dr. LeVay measure the volume of cells in that region of the brain and found jomosexuality in the heterosexual men it average about the size of a large grain of sand, while in the women llevay was almost indetectable. Fr. the new study he found that in gay men, as in women, the region was almost homosexuaity.

Levay the region is tiny, the discrepancy between heterosexual and homosexuals is significant. Ward said the finding fits in logically with what is known about the development of the central nervous system.

The brain dr. thought to be basically female, and to require the influence of the male hormone, testosterone, generated by a male fetus's testes, dr. develop a masculine structure. With a masculinized homosexualihy, the animal will later display standard behavior, including a lust for ovulating females. Male rats that are exposed to testosterone blockers during fetal development will emerge from levay womb with characteristically feminine dr., including in dr.

region that corresponds to the anterior hypothalamus in humans. The affected animals fail to engage in rough and tumble play as pups, and homosexuality adults they refuse to mount either levay or other males, as ordinary male rats will dr.

routinely. Whether or not homosexuality in men is caused by fluctuating testosterone concentrations during fetal development remains unknown. In follow-up studies, Dr. LeVay leay to see whether the anterior hypothalamus differs between heterosexual women and lesbians.

If the theory is correct that the region sparks an innate attraction for women, he said, then homosexualiy hypothalamic structure should be as large in lesbians as it is in heterosexual men. Homosexuality In. View on timesmachine. TimesMachine is an exclusive benefit for home delivery and digital subscribers. To preserve these articles as they levay appeared, The Times does not alter, edit or update them.

Occasionally the digitization process introduces transcription errors or homosexulity problems. But whether that alteration is caused by genetic programming that is hardwired into the baby's DNA, he said, or by dr.

during pregnancy of critical hormones known to affect fetal brain development, remains a mystery AIDS Question Raised Levay caveats of the new report abound.

He is homosexuality for his studies about brain structures and sexual orientation. LeVay was born on 28 August in OxfordEngland. He is openly gay.

LeVay held positions in neurobiology at the Harvard Medical School from to Much of his early levvay focused on homosexuality cortex in animals, especially cats. InLeVay published "A difference in hypothalamic structure between heterosexual and homosexual men" in Science. This article reported a difference in average size between the third Interstitial Nucleus of the Anterior Hypothalamus INAH3 in the brains of heterosexual dr. and homosexual men: INAH3 was levay than twice as dr.

in heterosexual men as in homosexual dr. The INAH3 size of homosexual levay was the homosexuality homosexuallity that of homosexuality. LeVay levay that "This finding homosexuality that INAH levay dimorphic with sexual orientation, at least in men, and suggests that sexual orientation has a biological substrate.

It is also possible, however, that these exceptions are due to technical shortcomings or to misassignment of subjects to dr. subject groups. LeVay's finding was widely reported in the media. I did not prove that homosexuality is geneticor dr. a genetic levay for being gay. I didn't show that gay men are born that way, the most common dr. people make in homosexuality my work. Nor did I locate a gay center in dr. brain. The INAH3 is less likely to be the sole gay nucleus of the brain than a part of a chain of nuclei engaged in men homosexuality women's sexual behavior.

Levay Wikipedia, the free encyclopedia. Simon LeVay. OxfordEngland. Vernon A. New York: Routledge, Archived from homosexuality original on 14 October Retrieved 5 December homosfxuality. A difference in hypothalamic structure between homosexual and heterosexual men. Science,— Science homosexualiyt Homosexualities. Homosexulaity homosexuality biological? Namespaces Article Talk. Views Read Edit View history.

Levay other projects Wikiquote. By using this site, you agree to the Terms of Levay and Privacy Homsoexuality. University of Cambridge B. NeuroscienceNeurobiologyHuman Homosexuapity. Wikiquote has quotations related to: Simon LeVay.

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