Thursday, August 13, 2009

Why Humans Can Talk And Chimps Can't

Nothing to say (IMAGE: Manfred Rutz/Rex Features)

From New Scientist:

A brain region critical to speech and language ballooned after humans split from chimpanzees, a new study finds.

Named after French physician, Pierre Paul Broca, who identified the region in two brain-damaged patients incapable of uttering more than a few words, Broca's area usually occupies a much larger portion of the left half of the human brain than the right.

Because right-handed humans also tend to process language in their left halves – lefties' brain are flip-flopped – some researchers think that lop-sidedness in Broca's area may help explain why humans alone developed language.

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