The cerebral torque and directional asymmetry for hand use are correlates of the capacity for language in homo sapiens
Behavioral and Brain Sciences 28 (4):595-596 (2005)
The claim of consistent hemispheric specialisations across classes of chordates is undermined by the absence of population-based directional asymmetry of paw/hand use in rodents and primates. No homologue of the cerebral torque from right frontal to left occipital has been established in a nonhuman species. The null hypothesis that the torque is the sapiens-specific neural basis of language has not been disproved.
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