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With the help of MRI found evidence of innateness of homosexuality

Employees Stockholm Karolinska Institute have found structural brain characteristics that distinguish gay and lesbian members of the sexual majority. According to the authors of the study, published in the Proceedings of the National Academy of Sciences, their findings suggest innate homosexual orientation.

Swedish neuroscientists Ivanka Savic and Per Lindstrom (Ivanka Savic and Per Lindström) attracted to the study of 90 volunteers: 20 gay men and lesbians, and 25 for men and women of the traditional orientation. Participants were examined with magnetic resonance imaging (MRI) and positron emission tomography (PET), which allows to observe the interaction of different parts of the brain in real time.

 

The first study found that gay men and heterosexual women both hemispheres of the brain are approximately equal in volume, whereas heterosexual men and lesbians the right hemisphere, usually a few more left.


Results of positron emission tomography proved to be even more meaningful. As it turned out, sexual preferences of the participants were clearly associated with very complex characteristics of interactions of the amygdala to other parts of the brain.

Amygdala is a pair of neurons located inside the temporal lobes. These anatomical structures associated with the formation of positive (pleasure) and negative (fear) emotions, and aggressive behavior.

Lesbians and heterosexual men the greatest number of relationships with other divisions formed the right amygdala, and its activation was accompanied by connecting the prefrontal cortex and the caudate nucleus and lenticular nucleus shell. Do gay men and heterosexual women the leading role played by the left amygdala, which interacted anterior cingulate.

The researchers identified the relationship shows the deep differences in the emotional life of lesbian and heterosexual male on the one hand, and gay men and heterosexual women on the other. The first two groups of stress causes a rapid and energetic response: in a threatening situation, such people are either thrown into the fight, or flee. Gay men and heterosexual women respond to stress more emotionally, with what may be linked to an increased tendency to depression and posttraumatic stress disorder. However, this does not mean all gays femininity or masculinity of all lesbians. Such a myth - generally one of the most incompetent in the community.

What else do we know about sexual minorities

In recent decades, scientists have learned about the supporters of same-sex love in a lot. For example, some data suggest that gay men are different from other men by a number of anatomical features - for example, significant differences in the structure of some nuclei of the hypothalamus and other subcortical brain structures.

Some time ago, scientists discovered that the brains of gay men and lesbians differently react to pheromones and treats erotic impulses are not quite as brain heterosexuals. Brain gays as heterosexual women responded only to male pheromones, and virtually ignored the women. While in the brains of lesbians and heterosexual men the picture was just the opposite.

Among gays and lesbians is much more common left-handed people, or people, ambidexter. According to some reports, the homosexual passions among both men and women are statistically associated with an increased level of speech functions and spatial memory.

About deep biological roots of homosexuality is evidenced not only in relation to new scientific data, but also the widespread prevalence of this phenomenon, and very good examples from the animal world.

Where are the gays

Growing evidence suggests the innate nature of sexual orientation in recent years. Homosexuality is explained by genetic predisposition, or features of fetal development. The first version is confirmed by studies of twins: identical twins with identical genotypes were significantly more likely share the same sexual preference as compared with fraternal twins, the genes are different.

Proponents of the second version associated intrauterine formation homosexuality with other factors such as exposure to elevated levels of testosterone in the fetus or the mother's immune system attacks the body of the fetus. So, men are more likely to be born gay in the presence of older brothers, as the mother's hormones during pregnancy in this case varies.

Supporters of traditional values ​​used to consider the attraction to persons of the same gender conscious choice, a consequence of sexual misconduct or improper upbringing. In this case, such a deviation from accepted norms deserves prosecution, or if the company wants to show humanism - health care. Up until this time, gays and lesbians were treated - one soul-saving conversation, and who and electroshock. True, the effectiveness of these methods has always been close to zero. New scientific evidence suggests that such attempts to re-nature were doomed to failure.

However, many people are hard to face the truth, or at least try to get rid of stupid stereotypes and images imposed by the media, which often serves as an occasion for ridicule, humiliation, and a complete ignorance in this matter.

American Psychiatric Association has refused to consider homosexuality a mental disorder in 1973, and from the international classification of diseases, the term withdrawn only in the early '90s. Rightness of their decisions clearly demonstrate the latest scientific discoveries. However, a number of psychiatrists from different countries, always enjoy the support of religious groups, continue to adhere to old beliefs and their attempts to redirect the libido neighbors in a traditional manner. But still without result.

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