期刊
CEREBRAL CORTEX
卷 17, 期 8, 页码 1757-1765出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/cercor/bhl086
关键词
brain asymmetry; chimpanzees; corpus callosum; handedness
资金
- NCRR NIH HHS [RR-00165, P51 RR000165] Funding Source: Medline
- NICHD NIH HHS [HD-38051, P01 HD038051-050005, P01 HD038051] Funding Source: Medline
- NINDS NIH HHS [R01 NS042867-05, R01 NS042867, NS-42867, R01 NS036605, R01 NS036605-08, NS-36605] Funding Source: Medline
It has been suggested from studies in human subjects that sex, handedness, and brain asymmetries influence variation in corpus callosum (CC) size and these differences reflect the degree of connectivity between homotopic regions of the left and right cerebral hemispheres. Here we report that handedness is associated with variation in the size of the CC in chimpanzees. We further report that variation in brain asymmetries in a cortical region homologous to Broca's area is associated with the size of the CC but differs for right- and left-handed individuals. Collectively, the results suggest that individual differences in functional and neuroanatomical asymmetries are associated with CC variation not just in humans but also in chimpanzees and therefore may reflect a common neural basis for laterality in these 2 species.
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