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Web address: http://www.sciencedaily.com/releases/2008/06/ 080617151845.htm Symmetry Of Homosexual Brain Resembles That Of Opposite Sex, Swedish Study Finds Covariations with the respective amygdala seed region in hetero- and homosexual subjects. The Sokoloff scale indicates T values. Clusters detected at T = 3.0 are superimposed on the standard MR image of the brain. (Credit: Image courtesy of National Academy of Sciences, PNAS (copyright 2008).) June 18, 2008 Swedish researchers have found that some physical attributes of the homosexual brain resemble those found in the opposite sex, according to an article published online (June 16) in the Proceedings of the National Academy of Sciences. Some psychological tests have shown differences between men and women in the extent to which they employ the brain's hemispheres in verbal tasks. Other research has hinted that homosexuals may exhibit the tendencies of the opposite sex in brain behavior unrelated to sexual activity. Ivanka Savic and Per Lindström, of the Department of Clinical Neuroscience at the Karolinska Institute in Stockholm, Sweden, now report that the brains of heterosexual men and homosexual women are slightly asymmetricthe right hemisphere is larger than the leftand the brains of gay men and straight women are not. Positron emission tomography (PET) scans taken by the researchers also show that in connectivity of the amygdala (which is important for emotional learning), lesbians resemble straight men, and gay men resemble straight women. The researchers analyzed the brains of 90 subjects, using magnetic resonance imaging (MRI) to assess brain volume and PET data partly gleaned from previous olfactory studies. One possible interpretation of the connectivity pattern in straight men and lesbians is that the amygdala is wired for a greater fight-or-flight response, the authors say. Share this story on Facebook, Twitter, and Google: Other social bookmarking and sharing tools: Share on stumbleupon Share on linkedin Share on pinterest_share Share on blogger Share on digg Share on delicious Share on newsvine | 245 Story Source: The above story is reprinted from materials provided by Proceedings of the National Academy of Science. Note: Materials may be edited for content and length. For further information, please contact the source cited above. Journal Reference: Ivanka Savic and Per Lindström. PET and MRI show differences in cerebral asymmetry and functional connectivity between homo- and heterosexual subjects. Proceedings of the National Academy of Sciences, 2008; DOI: 10.1073/pnas.0801566105 Need to cite this story in your essay, paper, or report? Use one of the following formats: APA MLA Proceedings of the National Academy of Science (2008, June 18). Symmetry Of Homosexual Brain Resembles That Of Opposite Sex, Swedish Study Finds. ScienceDaily. Retrieved May 13, 2013, from http://www.sciencedaily.com /releases/2008/06/080617151845.htm Note: If no author is given, the source is cited instead. ------------------------------------ Post message: [email protected] Subscribe : [email protected] Unsubscribe : [email protected] List owner : [email protected] Homepage : http://proletar.8m.com/Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/proletar/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/proletar/join (Yahoo! ID required) <*> To change settings via email: [email protected] [email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
