Planum Temporale - Other Than Humans

Other Than Humans

Although the brain area was thought to be unique to humans, almost like the anatomic version of the linguistic "language organ" of Noam Chomsky, it was shown to be similarly leftward asymmetric in chimpanzees and other great apes but not other primates, as was a related, rightward asymmetric, brain region the planum parietale that is implicated with dyslexia in humans. Monkeys show cellular asymmetry but not gross anatomic asymmetry of the planum temporale. (Brain Research, 2008). The question still remains open; what are great apes or monkeys using this "non-human primate language area" for?

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