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Sexual dimorphism and handedness in the human corpus callosum based on magnetic resonance imaging

  • Radiologic Anatomy
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Abstract

The corpus callosum (CC) is a major anatomical and functional commissure linking the two cerebral hemispheres. With MR imaging in the sagittal plane, the corpus callosum can be depicted in great detail. Mid-sagittal magnetic resonance images of 80 normal individuals were analyzed to assess whether or not the morphology of the corpus callosum and its parts are related to sex and handedness. The subjects were 40 males (20 right-handers and 20 left-handers) and 40 females (20 right-handers and 20 left-handers). The midsagittal area of the corpus callosum was divided into seven sub-areas using Witelson’s method. The most striking morphological changes concerned left-handers, who had larger areas of the anterior body, posterior body and isthmus than right-handers. In addition, right-handed males had larger rostrums and isthmuses than right-handed females. These significantly increased areas were related to handedness in right-handed males. However, left-handed males had larger anterior and posterior bodies than right-handed males. In contrast, there was no significant difference between left-handers and right-handers in females. The areas of the rostrum and posterior body of the corpus callosum increased significantly with sex in males. Moreover, there were no significant age-related changes in the total corpus callosum and sub-areas of the corpus callosum. In conclusion, these anatomical changes in corpus callosum morphology require taking the sexual definition and dominant handedness into consideration.

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Authors and Affiliations

  1. Department of Anatomy, Dicle University Medical Faculty, Diyarbakır, Turkey

    M. C. Tuncer & E. S. Hatipoğlu

  2. Department of Radiology, Dicle University Medical Faculty, Diyarbakır, Turkey

    M. Özateş

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  1. M. C. Tuncer
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  2. E. S. Hatipoğlu
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  3. M. Özateş
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Correspondence to M. C. Tuncer.

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Tuncer, M.C., Hatipoğlu, E.S. & Özateş, M. Sexual dimorphism and handedness in the human corpus callosum based on magnetic resonance imaging. Surg Radiol Anat 27, 254–259 (2005). https://doi.org/10.1007/s00276-004-0308-1

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  • DOI: https://doi.org/10.1007/s00276-004-0308-1

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