Neurophysiological origin of human brain asymmetry for speech and language.

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.
Type de document :
Article dans une revue
Proceedings of the National Academy of Sciences of the United States of America , National Academy of Sciences, 2010, 107 (43), pp.18688-93. 〈10.1073/pnas.1007189107〉
Liste complète des métadonnées

https://hal.inria.fr/hal-00795772
Contributeur : Olivier Colliot <>
Soumis le : jeudi 28 février 2013 - 19:55:42
Dernière modification le : mardi 17 avril 2018 - 10:32:02

Lien texte intégral

Identifiants

Collections

CEA | EHESS | ICM | UPMC | PSL

Citation

Benjamin Morillon, Katia Lehongre, Richard S J Frackowiak, Antoine Ducorps, Andreas Kleinschmidt, et al.. Neurophysiological origin of human brain asymmetry for speech and language.. Proceedings of the National Academy of Sciences of the United States of America , National Academy of Sciences, 2010, 107 (43), pp.18688-93. 〈10.1073/pnas.1007189107〉. 〈hal-00795772〉

Partager

Métriques

Consultations de la notice

274