Journal
EUROPEAN JOURNAL OF NEUROSCIENCE
Volume 25, Issue 8, Pages 2565-2570Publisher
WILEY
DOI: 10.1111/j.1460-9568.2007.05502.x
Keywords
brain asymmetry; handedness; non-human primates; white matter
Categories
Funding
- NCRR NIH HHS [P51 RR000165-485848, RR-00165, P51 RR000165] Funding Source: Medline
- NICHD NIH HHS [HD-38051, P01 HD038051-100005, P01 HD038051] Funding Source: Medline
- NINDS NIH HHS [R01 NS036605, R01 NS042867-07, R01 NS042867, NS-42867, R01 NS036605-08, NS-36605] Funding Source: Medline
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Although behavioral and brain asymmetries have been documented in non-human primates, lateralization in cortical connectivity as reflected in white matter has not been described in any species, despite the intrinsic theoretical interest in white matter expansion during primate brain evolution. Here we report evidence of population-level leftward asymmetries in the white matter of chimpanzees. We further report that lateralization in white matter correlates with their handedness as well as neuroanatomical asymmetries in the precentral gyrus. These findings suggest that chimpanzees show asymmetries in cortical connectivity and these may serve as the foundation for morphological and behavioral laterality in primates, including humans.
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