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Brains evolution and neurolinguistic preconditions

Published online by Cambridge University Press:  04 February 2010

Wendy K. Wilkins  and
Jennie Wakefield
Wendy K. Wilkins
Affiliation:
Department of English, Arizona State University, Tempe, AZ 85287-0302Electronic mail: wendy.wilkins@asu.edu
Jennie Wakefield
Affiliation:
Department of Speech and Hearing Science, Arizona State University, Tempe, AZ 85287-1908Electronic mail: jennie@asu.edu
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Abstract

This target article presents a plausible evolutionary scenario for the emergence of the neural preconditions for language in the hominid lineage. In pleistocene primate lineages there was a paired evolutionary expansion of frontal and parietal neocortex (through certain well-documented adaptive changes associated with manipulative behaviors) resulting, in ancestral hominids, in an incipient Broca's region and in a configurationally unique junction of the parietal, occipital, and temporal lobes of the brain (the POT). On our view, the development of the POT in our ancestors resulted in the neuroanatomical substrate consistent with the ability for representations in modality-neutral association cortex and, as a result of structure-imposing interaction with Broca's area, the hierarchically structured “conceptual structure.” Evidence from paleoneurology and comparative primate neuroanatomy is used to argue that Homo habilis (2.5–2 million years ago) was the first hominid to have the appropriate gross neuroanatomical configuration to support conceptual structure. We thus suggest that the neural preconditions for language are met in H. habilis. Finally, we advocate a theory of language acquisition that uses conceptual structure as input to the learning procedures, thus bridging the gap between it and language.

Keywords

conceptual structureevolutionHomo habilislanguage acquisitionlanguage biologylanguage originneurolinguisticspaleoneurologypreadaptationsensorimotor feedback

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Type
Target Articles
Information
Behavioral and Brain Sciences , Volume 18 , Issue 1: An International Journal of Current Research and Theory with Open Peer Commentary , March 1995 , pp. 161 - 182
Copyright
Copyright © Cambridge University Press 1995

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