T attention disorders

pages

English

Documents

Écrit par
Yves Chaixa

Publié par
pefav

Lire un extrait

Obtenez un accès à la bibliothèque pour le consulter en ligne En savoir plus

Découvre YouScribe et accède à tout notre catalogue !

Je m'inscris

Découvre YouScribe et accède à tout notre catalogue !

Je m'inscris

pages

English

Documents

Lire un extrait

Obtenez un accès à la bibliothèque pour le consulter en ligne En savoir plus

Publié par

pefav

Langue

English

an : T attention disorders Yves Chaixa,c,, Jean-Michel A Pascale de Castelnaua, Jacque aUnite de Neurologie Pediatrique, Hopital des bUniversite Paul-Sabatier, LAPMA, EA 3691 T cINSERM U825, Hopital de Purpan, IFR 96 To Motor impairment (40–57% depending on the severity of motor difficulties) presented a motor impairment instruction, adequate intelligence and socio-cultural oppor- y re- rs as impairment profile or the presence of co-morbidity. Several ARTICLE IN PRESS E U R O P E AN J O U RNA L O F PA E D I AT R I C N EU RO L O G Y 11 ( 2007 ) 368 – 374 Corresponding author. Tel.: +33 0534 55 8575; fax: +33 05 3455 8710. tunity.1 This disorder is remarkably common but with an uncertain prevalence rate, ranging from 5% to 17.5%.2 A genetic origin with a neurological basis is admitted now for theories of dyslexia have been proposed.3,4 As a ‘top-down' conceptualization, the phonological theory emphasizes the central role of an impairment of phonological representations,5 1090-3798/$ - see front matter & 2007 European Paediatric Neurology Society. Published by Elsevier Ltd. All rights reserved. doi:10.1016/j.ejpn.2007.03.006 E-mail address: chaix.

attention deficit

children

found

french population

reading age

also found

motor impairment

no significant

Voir

Publié par

pefav

Langue

English

Original article

ARTICLE IN

PRESS

E U R O P E A N J O U R N A L O F P A E D I A T R I C N E U R O L O G Y1 1 3 6 8 – ( 2 0 0 7 ) 3 7 4

Official Journal of the European Paediatric Neurology Society

Motor impairment in attention disorders

dyslexia:

The

inﬂuence

a,c,ab a YvesChaix,JeanMichelAlbaret,C´elineBrassard,EmmanuelCheuret, a a a c Pascale de Castelnau , Jacques Benesteau , Caroline Karsenty , JeanFranc-´eDsenomtoi a Unite´deNeurologiePediatrique,HˆopitaldesEnfants,330avdeGrandeBretagne,31059ToulouseCedex9,France b Universit´ePaulSabatier,LAPMA,EA3691Toulouse,France c INSERM U825, Hoˆ pital de Purpan, IFR 96 Toulouse, France

a r t i c l e

i n f o

Article history: Received 26 April 2006 Received in revised form 8 March 2007 Accepted 13 March 2007

Keywords: Dyslexia Attention disorder Motor impairment

Introduction

a b s t r a c t

Developmental dyslexia is a heterogeneous syndrome with a phonological core deﬁcit and frequent association with other developmental disorders. Controversies exist about the inﬂuence of motor difﬁculties frequently encountered in dyslexia. According to different theoretical approaches, these motor impairments would reﬂect either a frequent co-morbid entity or a cerebellar dysfunction that could constitute the causal factor of reading disabilities. The principal aim of this study was to determine the frequency of motor impairments in a population of children with phonological dyslexia and specify possible links with attention deﬁcit. We analysed retrospectively motor and attention abilities of 58 children with phonological dyslexia. An important sub-group of children with dyslexia (40–57% depending on the severity of motor difﬁculties) presented a motor impairment affecting co-ordination, balance and manual dexterity suggesting a cerebellar dysfunction. There was a signiﬁcant association between attention deﬁcit and motor impairments, with a speciﬁc impact on balance and co-ordination deﬁcits. The comparison of performance in four groups deﬁned according to the presence versus absence of attention deﬁcit and motor impairment, respectively, were not in favour of a unequivocal causal link between reading disabilities and motor or attention disorders. &2007 European Paediatric Neurology Society. Published by Elsevier Ltd. All rights reserved.

Developmental dyslexia or ‘Speciﬁc Reading Disability’ has been deﬁned as an unexpected, speciﬁc and persistent failure to acquire efﬁcient reading skills despite conventional instruction, adequate intelligence and socio-cultural oppor-1 tunity. This disorder is remarkably common but with an 2 uncertain prevalence rate, ranging from 5% to 17.5%. A genetic origin with a neurological basis is admitted now for

this developmental disorder, but the precise aetiology re-3 mains unknown. At a behavioural level, dyslexia appears as a relative heterogeneous syndrome. The variability of the phenotype results from several factors: the severity of reading deﬁcit, the sub-types of dyslexia depending on language impairment proﬁle or the presence of co-morbidity. Several 3,4 theories of dyslexia have been proposed. As a ‘top-down’ conceptualization, thephonological theoryemphasizes the 5 central role of an impairment of phonological representations,

 Corresponding author.05 34 55 87 10.fax: +33 05 34 55 85 75; Tel.: +33 E-mail address:chaix.y@chu-toulouse.fr (Y. Chaix). 1090-3798/$ - see front matter&2007 European Paediatric Neurology Society. Published by Elsevier Ltd. All rights reserved. doi:10.1016/j.ejpn.2007.03.006

Voir