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09-05-2006, 12:02
Lesbians' brains respond like straight men

Monday, May 8, 2006 Posted: 2228 GMT (0628 HKT)

WASHINGTON (AP) -- Lesbians' brains react differently to sex hormones than those of heterosexual women.

An earlier study of gay men also showed their brain response was different from straight men -- an even stronger difference than has now been found in lesbians.

Lesbians' brains reacted somewhat, though not completely, like those of heterosexual men, a team of Swedish researchers said in Tuesday's edition of Proceedings of the National Academy of Sciences.

A year ago, the same group reported findings for gay men that showed their brain response to hormones was similar to that of heterosexual women.

In both cases the findings add weight to the idea that homosexuality has a physical basis and is not learned behavior.

"It shows sexual orientation may very well have a different basis between men and women ... this is not just a mirror image situation," said Sandra Witelson, an expert on brain anatomy and sexual orientation at the Michael G. DeGroote School of Medicine at McMaster University in Hamilton, Ontario.

"The important thing is to be open to the likely situation that there are biological factors that contribute to sexual orientation," added Witelson, who was not part of the research team.

The research team led by Ivanka Savic at the Stockholm Brain Institute had volunteers sniff chemicals derived from male and female sex hormones. These chemicals are thought to be pheromones -- molecules known to trigger responses such as defense and sex in many animals.

Whether humans respond to pheromones has been debated, although in 2000 American researchers reported finding a gene that they believe directs a human pheromone receptor in the nose.

The same team reported last year on a comparison of the response of male homosexuals to heterosexual men and women. They found that the brains of gay men reacted more like those of women than of straight men.

The new study shows a similar, but weaker, relationship between the response of lesbians and straight men.

Heterosexual women found the male and female pheromones about equally pleasant, while straight men and lesbians liked the female pheromone more than the male one. Men and lesbians also found the male hormone more irritating than the female one, while straight women were more likely to be irritated by the female hormone than the male one.

All three groups rated the male hormone more familiar than the female one. Straight women found both hormones about equal in intensity, while lesbians and straight men found the male hormone more intense than the female one.

The brains of all three groups were scanned when sniffing male and female hormones and a set of four ordinary odors. Ordinary odors were processed in the brain circuits associated with smell in all the volunteers.

In heterosexual males the male hormone was processed in the scent area but the female hormone was processed in the hypothalamus, which is related to sexual stimulation. In straight women the sexual area of the brain responded to the male hormone while the female hormone was perceived by the scent area.

In lesbians, both male and female hormones were processed the same, in the basic odor processing circuits, Savic and her team reported.

Each of the three groups of subjects included 12 healthy, unmedicated, right-handed and HIV-negative individuals.

The research was funded by the Swedish Medical Research Council, Karolinska Institute and the Wallenberg Foundation.

http://edition.cnn.com/2006/HEALTH/05/08/lesbian.brains.ap/index.html

09-05-2006, 12:12




Potjuh met Vet!!


09-05-2006, 12:14
Zoals mij al veel langer bekend is, homoseksualiteit is gewoon een genetisch iets, daar kun je als mens niets aan doen.

Als je in de schepping gelooft, dan mag je per definitie geloven dat god een foutje maakte bij dat schppen van mens en dier.

09-05-2006, 12:44
Misschien is homofilie wel een schitterend mechanisme van de natuur om de enorme overbevolking tegen te gaan. De mens is namelijk een plaag. De voorplanting moet worden geremd en de natuur heeft daar zo zijn mechanismen voor. Je ziet het bij vrijwel alle diersoorten.
Ik vind homofilie dus geen foutje in de schepping, maar een erg doordacht beschermingsmechanisme dat de schepper heeft geintroduceerd .

09-05-2006, 12:53


De gay als kapotje? Tja...

09-05-2006, 12:57

Citaat door hiek:
De gay als kapotje? Tja...
Het is wachten op de eerste "natuurlijke" transformaties......

09-05-2006, 12:59

Citaat door GodSend:
Lesbians' brains respond like straight men

Monday, May 8, 2006 Posted: 2228 GMT (0628 HKT)

WASHINGTON (AP) -- Lesbians' brains react differently to sex hormones than those of heterosexual women.

An earlier study of gay men also showed their brain response was different from straight men -- an even stronger difference than has now been found in lesbians.

Lesbians' brains reacted somewhat, though not completely, like those of heterosexual men, a team of Swedish researchers said in Tuesday's edition of Proceedings of the National Academy of Sciences.

A year ago, the same group reported findings for gay men that showed their brain response to hormones was similar to that of heterosexual women.

In both cases the findings add weight to the idea that homosexuality has a physical basis and is not learned behavior.

"It shows sexual orientation may very well have a different basis between men and women ... this is not just a mirror image situation," said Sandra Witelson, an expert on brain anatomy and sexual orientation at the Michael G. DeGroote School of Medicine at McMaster University in Hamilton, Ontario.

"The important thing is to be open to the likely situation that there are biological factors that contribute to sexual orientation," added Witelson, who was not part of the research team.

The research team led by Ivanka Savic at the Stockholm Brain Institute had volunteers sniff chemicals derived from male and female sex hormones. These chemicals are thought to be pheromones -- molecules known to trigger responses such as defense and sex in many animals.

Whether humans respond to pheromones has been debated, although in 2000 American researchers reported finding a gene that they believe directs a human pheromone receptor in the nose.

The same team reported last year on a comparison of the response of male homosexuals to heterosexual men and women. They found that the brains of gay men reacted more like those of women than of straight men.

The new study shows a similar, but weaker, relationship between the response of lesbians and straight men.

Heterosexual women found the male and female pheromones about equally pleasant, while straight men and lesbians liked the female pheromone more than the male one. Men and lesbians also found the male hormone more irritating than the female one, while straight women were more likely to be irritated by the female hormone than the male one.

All three groups rated the male hormone more familiar than the female one. Straight women found both hormones about equal in intensity, while lesbians and straight men found the male hormone more intense than the female one.

The brains of all three groups were scanned when sniffing male and female hormones and a set of four ordinary odors. Ordinary odors were processed in the brain circuits associated with smell in all the volunteers.

In heterosexual males the male hormone was processed in the scent area but the female hormone was processed in the hypothalamus, which is related to sexual stimulation. In straight women the sexual area of the brain responded to the male hormone while the female hormone was perceived by the scent area.

In lesbians, both male and female hormones were processed the same, in the basic odor processing circuits, Savic and her team reported.

Each of the three groups of subjects included 12 healthy, unmedicated, right-handed and HIV-negative individuals.

The research was funded by the Swedish Medical Research Council, Karolinska Institute and the Wallenberg Foundation.

http://edition.cnn.com/2006/HEALTH/05/08/lesbian.brains.ap/index.html
Klopt wel met wat ik er van weet.

Maar er is ook nog iets anders.

Veel lesbiennes hebben grote moeite met hun emotionaliteit / emotionele gevoelens.

Vreemd dat dit aspect niet onderzocht is.

09-05-2006, 13:01

Citaat door aplat:
Veel lesbiennes hebben grote moeite met hun emotionaliteit / emotionele gevoelens.

Vreemd dat dit aspect niet onderzocht is.
Als jij er een paar kunt regelen wil ik dat wel onder-zoeken.....

09-05-2006, 13:02

Citaat door GodSend:
Als jij er een paar kunt regelen wil ik dat wel onder-zoeken.....
Ik ben er zelf met een gehuwd geweest.

Het kon niet duidelijker.

09-05-2006, 13:03

Citaat door an3sdej:
Zoals mij al veel langer bekend is, homoseksualiteit is gewoon een genetisch iets, daar kun je als mens niets aan doen.

Als je in de schepping gelooft, dan mag je per definitie geloven dat god een foutje maakte bij dat schppen van mens en dier.


veelzeggend, andries...

09-05-2006, 13:04

Citaat door aplat:
Ik ben er zelf met een gehuwd geweest.

Het kon niet duidelijker.
Hahahaha, hoop dat die bekering niet aan jou lag.....

09-05-2006, 13:04

Citaat door aplat:
Ik ben er zelf met een gehuwd geweest.

Het kon niet duidelijker.
pars pro toto?

09-05-2006, 13:04



Citaat door an3sdej:
Zoals mij al veel langer bekend is, homoseksualiteit is gewoon een genetisch iets, daar kun je als mens niets aan doen.

Als je in de schepping gelooft, dan mag je per definitie geloven dat god een foutje maakte bij dat schppen van mens en dier.
Dat formuleerde Augustinus ook al.

09-05-2006, 13:05

Citaat door a_tropos:


veelzeggend, andries...
Vanuit het geloof gezien Atropos

09-05-2006, 13:05

Citaat door an3sdej:
Vanuit het geloof gezien Atropos
amen!

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