EFFECTS OF HANDEDNESS AND SEX ON THE MORPHOLOGY OF THE CORPUS-CALLOSUM - A STUDY WITH BRAIN MAGNETIC-RESONANCE-IMAGING
EFFECTS OF HANDEDNESS AND SEX ON THE MORPHOLOGY OF THE CORPUS-CALLOSUM - A STUDY WITH BRAIN MAGNETIC-RESONANCE-IMAGING
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DOI：
10.1016/0278-2626(91)90084-l
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发表时间：
1991-05-01
影响因子：
2.5
通讯作者：
KHALIL, R
中科院分区：
文献类型：
--
作者：
HABIB, M;GAYRAUD, D;KHALIL, R
In view of conflicting data in the existing literature, we examined 53 normal subjects using a handedness questionnaire and callosal area measurements obtained from midsagittal MRI images. The callosum was found to be significantly larger in nonconsistent right-handers (NCRH), especially in its anterior half and especially for males. A significant hand × sex interaction, favoring consistent right-handed (CRH) females, was also found for the posterior midbody, a region known to house interhemispheric fibers connecting the right and left posterior association cortices. These results (1) confirm Witelson's (1985) first findings on postmortem specimens; (2) validate a dichotomy between CRH and NCRH rather than simply considering the writing hand, as was the case in most other similar studies; and (3) suggest that at least two different sex-related—probably hormonal—factors may be acting during the callosal development, one explaining the larger anterior half in NCRH males and the other the larger posterior midbody in CRH females.
