Enhanced response of the left frontal cortex to slowed down speech in dyslexia: an fMRI study.

Détails

ID Serval
serval:BIB_48A00DB88B75
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Enhanced response of the left frontal cortex to slowed down speech in dyslexia: an fMRI study.
Périodique
Neuroreport
Auteur(s)
Ruff S., Cardebat D., Marie N., Démonet J.F.
ISSN
0959-4965 (Print)
ISSN-L
0959-4965
Statut éditorial
Publié
Date de publication
2002
Peer-reviewed
Oui
Volume
13
Numéro
10
Pages
1285-1289
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov'tPublication Status: ppublish
Résumé
Language difficulties of dyslexic subjects may result partly from a basic deficit in processing rapidly changing sensory inputs. In this fMRI study, we compared brain activities in adult dyslexics and controls during implicit categorical perception of phonemes with normal and slowed down stimuli. Perception of phonemic contrasts activated a frontal parietal network (Broca's area and the left supramarginal gyrus) in which the frontal component was down-regulated by slowed speech in controls and enhanced in dyslexic subjects. No modulation by speech rate was observed in the left supra-marginal gyrus. Enhancement of activity in Broca's area for slowed speech in dyslexic subjects might represent a neural basis of the improvement of performance that has been observed after remediation using this type of stimuli.
Mots-clé
Adult, Dyslexia/physiopathology, Frontal Lobe/physiology, Functional Laterality/physiology, Humans, Magnetic Resonance Imaging, Male, Speech, Speech Perception/physiology
Pubmed
Web of science
Création de la notice
24/03/2013 18:32
Dernière modification de la notice
03/03/2018 16:52
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