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Lateralization of Speech Production Starts in Sensory Cortices—A Possible Sensory Origin of Cerebral Left Dominance for Speech

By Christian Kell, Benjamin Morillon, Frederique Kouneiher and Anne-Lise Giraud

Abstract

International audienceSpeech 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

Topics: functional MRI, auditory cortex, articulation, task set, reading, [SCCO]Cognitive science, [SCCO.NEUR]Cognitive science/Neuroscience
Publisher: 'Oxford University Press (OUP)'
Year: 2011
DOI identifier: 10.1093/cercor/bhq167
OAI identifier: oai:HAL:hal-02088032v1
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