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Titolo:
Developmental dyslexia: atypical cortical asymmetries and functional significance
Autore:
Robichon, F; Levrier, O; Farnarier, P; Habib, M;
Indirizzi:
Univ Bourgogne 1, LEAD, CNRS, ESA 5022, F-21000 Dijon, France Univ Bourgogne 1 Dijon France F-21000 S, ESA 5022, F-21000 Dijon, France CHU Timone, Dept Neurol, Marseille, France CHU Timone Marseille FranceCHU Timone, Dept Neurol, Marseille, France CHU Timone, Dept Neuroradiol, Marseille, France CHU Timone Marseille France Timone, Dept Neuroradiol, Marseille, France
Titolo Testata:
EUROPEAN JOURNAL OF NEUROLOGY
fascicolo: 1, volume: 7, anno: 2000,
pagine: 35 - 46
SICI:
1351-5101(200001)7:1<35:DDACAA>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
PLANUM TEMPORALE ASYMMETRY; CEREBRAL-DOMINANCE; BRAIN MORPHOLOGY; ADULT DYSLEXICS; HANDEDNESS; DEFICITS; SPEECH; CORTEX; REAPPRAISAL; HEMISPHERES;
Keywords:
Broca's area; dyslexia; parietal lobe; phonological deficit; Planum temporale; speech processing;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
51
Recensione:
Indirizzi per estratti:
Indirizzo: Robichon, F Univ Bourgogne 1, LEAD, CNRS, ESA 5022, 6 Blvd Gabriel, F-21000 Dijon, France Univ Bourgogne 1 6 Blvd Gabriel Dijon France F-21000 , France
Citazione:
F. Robichon et al., "Developmental dyslexia: atypical cortical asymmetries and functional significance", EUR J NEUR, 7(1), 2000, pp. 35-46

Abstract

Using brain magnetic resonance imaging, we measured in 16 young developmental dyslexic adults and 14 age-matched controls cortical asymmetries of posterior language-related areas, including Plenum temporale and parietal operculum cortical ribbon, and of the inferior frontal region related in the left hemisphere to speech processing. In addition, we assessed the sulcal morphology of the inferior frontal gyrus in both groups according to a qualitative method. The dyslexic subjects also performed specific tasks exploring different aspects of phonological and lexical-semantic processes. Results showed that: (1) contrary to most results reported in the literature, there is a lack of any morphological difference relative to Planum temporale asymmetry between the two groups; (2) there are significant differences betweendyslexic and control subjects relative to frontal areas; (3) concerning the parietal region, then is a mon asymmetrical pattern towards the left sidein dyslexic subjects than in controls; and (4) relations in dyslexic subjects between parietal asymmetry coefficient and the level of performance in a phonological task have a particular reliance on verbal short-term memory,frontal asymmetry and performance in a non-word reading task. Considering these results it is suggested that phonological segmentation skills may relate to frontal lobe morphology, while phonological memory-based impairment in people with dyslexia may rather relate to parietal lobe morphology.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/01/20 alle ore 16:02:46