Brain, Vol. 115, No. 5, 1521-1541, 1992
© 1992 Guarantors of Brain
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MORPHOMETRY OF THE SYLVIAN FISSURE AND THE CORPUS CALLOSUM, WITH EMPHASIS ON SEX DIFFERENCES
1Neuropsychiatric Institute Franz Hall, Los Angeles, California, USA 2Department of Anatomy and Cell Biology, Brain Research Institute Franz Hall, Los Angeles, California, USA 3Department of Psychology Franz Hall, Los Angeles, California, USA
Correspondence to:
Correspondence to: Eran Zaidel, Department of Psychology, Franz Hall, UCLA, Los Angeles, CA 90024-1563, USA
The relationship between anatomical asymmetrics in the perisylvian region and the sizes of different regions of the corpus callosum was investigated post-mortem in 40 brains of right-handed hospital admissions (20 males, 20 females) with no cortical involvement. There were no sex differences either in anatomical asymmetries or in regional size of the callosum. There was a negative correlation between the absolute value of Sylvian fissure(planum temporale) asymmetries and the size of the isthmus in males but not in females Further, there was a significant negative correlation between the size of the Sylvian fissure (or planum temporale) and the size of the callosal mid-body in males but not in females There was no correlation between the asymmetry of the planum temporale (left-right) and total size of the planum (left-right) These findings constrain theories about the ontogenesis of hemispheric specialization through changes in callosal connectivity and about sex differences in interhemispheric organization
Received August 20, 1991. Revised March 3, 1992. Accepted March 25, 1992.
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