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Lateralization of speech production starts in sensory cortices--a possible sensory origin of cerebral left dominance for speech.

Authors
  • Kell, Christian Alexander
  • Benjamin Morillon
  • Kouneiher, Frederique
  • Giraud, Anne-Lise
Type
Published Article
Journal
Cerebral cortex (New York, N.Y. : 1991)
Publication Date
Mar 31, 2011
Volume
21
Issue
4
Pages
932–937
Identifiers
DOI: 10.1093/cercor/bhq167
PMID: 20833698
Source
Medline
License
Unknown

Abstract

Speech production is a left-lateralized brain function, which could arise from a left dominance either in speech executive or sensory processes or both. Using functional magnetic resonance imaging in healthy subjects, we show that sensory cortices already lateralize when speaking is intended, while the frontal cortex only lateralizes when speech is acted out. The sequence of lateralization, first temporal then frontal lateralization, suggests that the functional lateralization of the auditory cortex could drive hemispheric specialization for speech production.

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