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Neandertal's Right-Handedness Verified, Hints at Language Capacity

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Neandertal's Right-Handedness Verified, Hints at Language Capacity
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There are precious few Neandertal skeletons available to science. One of the more complete was discovered in 1957 in France, roughly 900 yards away from the famous Lascaux Cave. That skeleton was dubbed "Regourdou." Then, about two decades ago, researchers examined Regourdou's arm bones and theorized that he had been right-handed.

"This skeleton had a mandible and parts of the skeleton below the neck," said David Frayer, professor of anthropology at the University of Kansas. "Twenty-plus years ago, some people studied the skeleton and argued that it was a right-handed individual based on the muscularity of the right arm versus the left arm."

Handedness, a uniquely human trait, signals brain lateralization, where each of the brain's two hemispheres is specialized. The left brain controls the right side of the body and in a human plays a primary role for language. So, if Neandertals were primarily right-handed, like modern humans, that fact could suggest a capacity for language.

Now, a new investigation by Frayer and an international team led by Virginie Volpato of the Senckenberg Institute in Frankfurt, Germany, has confirmed Regourdou's right-handedness by looking more closely at the robustness of the arms and shoulders, and comparing it with scratches on his teeth. Their findings are published August 23 in the journal PLoS ONE.




Source: www.sciencedaily.com/releases/2012/08/120827160825.htm

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