Word: neuroendocrinologist
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Dates: during 1990-1999
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These conjectures about the corpus callosum have been hard to prove because the structure's girth varies dramatically with both age and health. Studies of autopsied material are of little use because brain tissue undergoes such dramatic changes in the hours after death. Neuroanatomist Laura Allen and neuroendocrinologist Roger Gorski of UCLA decided to try to circumvent some of these problems by obtaining brain scans from live, apparently healthy people. In their investigation of 146 subjects, published in April, they confirmed that parts of the corpus callosum were up to 23% wider in women than in men. They also measured...
Animal studies provide a good deal of evidence for a biological basis of sexual orientation. Through careful manipulation of hormone levels in newborn rats, Roger Gorski, a neuroendocrinologist at UCLA, has been able to produce male rodents that demonstrate feminine behavior. Other researchers, working with mice, have noted that female fetuses that develop between two male fetuses in a litter appear to be masculinized to some degree by their brothers' testosterone. They look more like males than females, mature more slowly, have fewer reproductive cycles as adults and are less attractive to male mice...
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