Neurophysiological origin of human brain asymmetry for speech and language.

Details

Serval ID
serval:BIB_7CC921260CDC
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Neurophysiological origin of human brain asymmetry for speech and language.
Journal
Proceedings of the National Academy of Sciences of the United States of America
Author(s)
Morillon B., Lehongre K., Frackowiak R.S., Ducorps A., Kleinschmidt A., Poeppel D., Giraud A.L.
ISSN
1091-6490 (Electronic)
ISSN-L
0027-8424
Publication state
Published
Issued date
26/10/2010
Peer-reviewed
Oui
Volume
107
Number
43
Pages
18688-18693
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Abstract
The physiological basis of human cerebral asymmetry for language remains mysterious. We have used simultaneous physiological and anatomical measurements to investigate the issue. Concentrating on neural oscillatory activity in speech-specific frequency bands and exploring interactions between gestural (motor) and auditory-evoked activity, we find, in the absence of language-related processing, that left auditory, somatosensory, articulatory motor, and inferior parietal cortices show specific, lateralized, speech-related physiological properties. With the addition of ecologically valid audiovisual stimulation, activity in auditory cortex synchronizes with left-dominant input from the motor cortex at frequencies corresponding to syllabic, but not phonemic, speech rhythms. Our results support theories of language lateralization that posit a major role for intrinsic, hardwired perceptuomotor processing in syllabic parsing and are compatible both with the evolutionary view that speech arose from a combination of syllable-sized vocalizations and meaningful hand gestures and with developmental observations suggesting phonemic analysis is a developmentally acquired process.

Keywords
Adult, Auditory Cortex/physiology, Brain/anatomy & histology, Brain/physiology, Dominance, Cerebral/physiology, Electroencephalography, Humans, Language, Magnetic Resonance Imaging, Male, Motor Cortex/physiology, Speech/physiology, Young Adult
Pubmed
Web of science
Open Access
Yes
Create date
09/12/2010 9:14
Last modification date
20/08/2019 14:38
Usage data