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Lateralization Of Function

Effects of Prenatal Testosterone on Lateralization Handedness and Language. Lateralization Of Function. Geschwind and Galaburda. Prenatal testosterone in males causes the right hemisphere to develop to the size of the left resulting in left-handedness . Witelson and Goldsmith.

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Lateralization Of Function

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  1. Effects of Prenatal Testosterone on Lateralization Handedness and Language Lateralization Of Function

  2. Geschwind and Galaburda • Prenatal testosterone in males causes the right hemisphere to develop to the size of the left resulting in left-handedness

  3. Witelson and Goldsmith • Exposure of prenatal testosterone to the Corpus Callosum instead of the hemisphere affected handedness

  4. The Experiment • 65 Children-31 girls, 34 boys • Testosterone levels were documented during their 16th-18th week prenatal state • At ages 5-7 Point System -1 For use of left hand 0 For use of both hands at separate attempts +1 For use of right hand

  5. The Experiment • Tests every 10 mins: • Drawing • Tooth brushing • Throwing (far) • Hammering • Stirring • Erasing • Opening a lid • Cutting with scissors • Grasping a glass of lemonade • Turning hands of a clock

  6. Results! • Results showed that neither theories were correct but Witelson and Nowakowski did find that pT affected the mid-body of the corpus callosum when the boys of the same test groups were analyzed at age 11 • This contributed to assymetry and the development of handedness

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