Journal
NEUROREPORT
Volume 17, Issue 9, Pages 923-927Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/01.wnr.0000221835.26093.5e
Keywords
chimpanzee; gesture; inferior frontal gyrus; language evolution; neuroanatomical asymmetry
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Funding
- NCRR NIH HHS [P51 RR000165, RR-00165] Funding Source: Medline
- NICHD NIH HHS [P01 HD038051-050005, P01 HD038051] Funding Source: Medline
- NIDCD NIH HHS [1F32DC007823, F32 DC007823] Funding Source: Medline
- NINDS NIH HHS [R01 NS036605-08, R01 NS042867-05, R01 NS042867, NS-42867, NS-36605, R01 NS036605] Funding Source: Medline
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Neuroanatomical asymmetries have been identified in chimpanzee frontal and temporal lobes including regions believed to be homologous to human Brocas and Wernicke's areas. This study examined whether or not neuroanatomical asymmetries in chimpanzees are associated with hand use during gestural communication. Analyses revealed that those chimpanzees that reliably employ their right hand for manual gestures have larger inferior frontal gyri in the left hemisphere than those apes that do not show consistent hand use for gestures. These findings are the first to provide a direct link between neuroanatomical asymmetries and the production of lateralized communicative behavior in non-human primates.
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