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Titolo:
Atypical organisation of the auditory cortex in dyslexia as revealed by MEG
Autore:
Heim, S; Eulitz, C; Kaufmann, J; Fuchter, I; Pantev, C; Lamprecht-Dinnesen, A; Matulat, P; Scheer, P; Borstel, M; Elbert, T;
Indirizzi:
Univ Konstanz, Dept Psychol, D-78457 Constance, Germany Univ Konstanz Constance Germany D-78457 chol, D-78457 Constance, Germany Univ Munster, Inst Expt Audiol, D-4400 Munster, Germany Univ Munster Munster Germany D-4400 Expt Audiol, D-4400 Munster, Germany Univ Munster, Dept Phoniatr & Pedaudiol, Munster, Germany Univ Munster Munster Germany ept Phoniatr & Pedaudiol, Munster, Germany
Titolo Testata:
NEUROPSYCHOLOGIA
fascicolo: 13, volume: 38, anno: 2000,
pagine: 1749 - 1759
SICI:
0028-3932(2000)38:13<1749:AOOTAC>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVOKED MAGNETIC-FIELDS; PLANUM TEMPORALE ASYMMETRY; DEVELOPMENTAL DYSLEXIA; PROCESSING DEFICIT; ATTENTION-DEFICIT; BRAIN MORPHOLOGY; HEALTHY-CHILDREN; POTENTIALS; ORGANIZATION; PSEUDOWORDS;
Keywords:
dyslexia; magnetoencephalography (MEG); auditory evoked magnetic field; children;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Life Sciences
Citazioni:
55
Recensione:
Indirizzi per estratti:
Indirizzo: Heim, S Univ Konstanz, Dept Psychol, POB D25, D-78457 Constance, Germany Univ Konstanz POB D25 Constance Germany D-78457 onstance, Germany
Citazione:
S. Heim et al., "Atypical organisation of the auditory cortex in dyslexia as revealed by MEG", NEUROPSYCHO, 38(13), 2000, pp. 1749-1759

Abstract

Neuroanatomical and -radiological studies have converged to suggest an atypical organisation in the temporal bank of the left-hemispheric Sylvian fissure for dyslexia. Against the background of this finding, we applied high temporal resolution magnetoencephalography (MEG) to investigate functional aspects of the left-hemispheric auditory cortex in 11 right-handed dyslexicchildren (aged 8-13 years) and nine matched normal subjects (aged 8-14 years). Event-related held components during a passive oddball paradigm with pure tones and consonant-vowel syllables were evaluated. The first major peak of the auditory evoked response, the M80, showed identical topographical distributions in both groups. In contrast, the generating brain structures of the later M210 component were located more anterior to the earlier response in children with dyslexia only. Control children exhibited the expectedactivation of more posterior source locations of the component that appeared later in the processing stream. Since the group difference in the relative location of the M210 source seemed to be independent of stimulus category, it is concluded that dyslexics and normally literate children differ as to the organisation of their left-hemispheric auditory cortex. (C) 2000 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/01/20 alle ore 10:44:43