AI Article Synopsis
- Studies show that factors like sex, handedness, and brain asymmetries affect the size of the corpus callosum (CC), which connects the left and right sides of the brain.
- Research indicates that in chimpanzees, handedness is linked to the size of the CC, similar to findings in humans.
- Differences in brain asymmetries related to an area similar to Broca's area correspond to CC size in both right- and left-handed individuals, suggesting shared neural traits for brain lateralization in humans and chimpanzees.
Article Abstract
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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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2018751 | PMC |
| http://dx.doi.org/10.1093/cercor/bhl086 | DOI Listing |
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