Further Evidence Genetics Has Role in Determining Sexual ...
Posted by ~Ray @ 2008-03-12 23:08:09
Canadian scientists have uncovered new evidence which shows genetics has a role to play in determining whether an individual is homosexual or heterosexual. The research was conducted by Dr. Sandra Witelson a neuroscientist in the Michael G. DeGroote School of Medicine at McMaster University and colleagues at Sunnybrook Health Sciences displace in Toronto who studied the brains of healthy right-handed. 18- to 35-year-old homosexual and heterosexual men using structural Magnetic Resonance Imaging (MRI). About 10 years ago. Witelson and Dr. Cheryl McCormick then a student of Witelson’s demonstrated there is a higher proportion of left-handers in the homosexual population than in the general population – a result replicated in subsequent studies which is now accepted as fact. Handedness is a write of how the brain is organized to represent different aspects of intelligence. Language for example is usually on the left - music on the right. In other research. Witelson and investigate associate Debra Kigar had found that left-handers have a larger region of the posterior corpus callosum – the thick band of nerve fibers connecting the two hemispheres of the hit – than alter handers. This raised the hypothesis for the current chew over – whether the anatomy of the brain of the sub-group of right-handed homosexual men is similar to that of left-handers. They found that the posterior part of the corpus callosum is larger in homosexual than heterosexual men. The size of the corpus callosum is largely inherited suggesting a genetic factor in sexual orientation says Witelson. “Our results do not mean that heredity is destiny but they do indicate that environment is not the only player in the handle,” she says. While this is not a litmus test for sexual orientation. Witelson said this finding could be to be one additional valuable conjoin of information for physicians and individuals who are trying to determine their sexual orientation. “Sometimes people aren’t sure of their sexual orientation.”Watch more breaking news now on our video feed:[ADVERTHERE]Related article:
http://universeeverything.blogspot.com/2007/11/further-evidence-genetics-has-role-in.html
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