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Right-handed chimpanzees provide clues to the origin of human language

Science Centric (16 Nov 2009 10:45 GMT) - Most of the linguistic functions in humans are controlled by the left cerebral hemisphere. A study of captive chimpanzees at the Yerkes National Primate Research Centre (Atlanta, Georgia), reported in the January 2010 issue of Elsevier's Cortex, suggests that this 'hemispheric lateralisation' for language may have its evolutionary roots in the gestural communication of our common ancestors. A large majority of the chimpanzees in the study showed a significant bias towards right-handed gestures when communicating, which may reflect a similar dominance of the left hemisphere for communication in chimpanzees as that seen for language functions in humans…

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