INDIVIDUAL-DIFFERENCES IN BRAIN ASYMMETRIES AND FIBER COMPOSITION IN THE HUMAN CORPUS-CALLOSUM

被引：145
|
作者：
ABOITIZ, F
SCHEIBEL, AB
FISHER, RS
ZAIDEL, E
机构：
[1] UNIV CHILE, FAC MED, DEPT FISIOL & BIOFIS, SANTIAGO, CHILE
[2] UNIV CALIF LOS ANGELES, CTR HLTH SCI 73346, DEPT ANAT & CELL BIOL, LOS ANGELES, CA 90024 USA
[3] UNIV CALIF LOS ANGELES, CTR HLTH SCI 73346, BRAIN RES INST, LOS ANGELES, CA 90024 USA
[4] UNIV CALIF LOS ANGELES, INST NEUROPSYCHIAT, LOS ANGELES, CA 90024 USA
来源：
BRAIN RESEARCH | 1992年 / 598卷 / 1-2期
关键词：
BRAIN ASYMMETRY; CEREBRAL CORTEX; CORPUS CALLOSUM; FIBER COMPOSITION; HUMAN; INTERHEMISPHERIC TRANSFER; LATERALIZATION; SEX DIFFERENCE;
D O I：
10.1016/0006-8993(92)90179-D
中图分类号：
Q189 [神经科学];
学科分类号：
071006 ;
摘要：
There have been several recent reports concerning individual differences in the gross morphometry of the human corpus callosum. However, no studies exist on individual differences in the fiber composition of the corpus callosum. Here we report for the first time the relation of fiber composition in specific callosal segments (as seen in light microscopy) to anatomical asymmetries in language-gifted cortex, as a function of sex. We found a significant negative correlation between Sylvian fissure asymmetries and the total numbers of fibers in the isthmus of males, and in the anterior splenium of females. In addition, a population of relatively large fibers (between 1 mum and 3 mum in diameter) in the isthmus showed a strong negative correlation with perisylvian asymmetries only in males. These findings suggest a sex-dependent, pathway-specific decrease in interhemispheric connectivity with increasing lateralization.
引用
收藏
页码：154 / 161
页数：8
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