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Electrophysiological correlates of impaired reading in dyslexic pre-adolescent children

2012-07Artigo científico Acesso restrito
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dc.contributor.authorAraújo, Susana
dc.contributor.authorBramão, Inês
dc.contributor.authorFaísca, Luís
dc.contributor.authorPetersson, Karl Magnus
dc.contributor.authorReis, Alexandra
dc.date.accessioned2024-03-22T14:40:18Z
dc.date.available2024-03-22T14:40:18Z
dc.date.issued2012-07
dc.date.updated2024-03-10T22:50:50Z
dc.description.abstractIn this study, event related potentials (ERPs) were used to investigate the extent to which dyslexics (aged 9–13 years) differ from normally reading controls in early ERPs, which reflect prelexical orthographic processing, and in late ERPs, which reflect implicit phonological processing. The participants performed an implicit reading task, which was manipulated in terms of letter-specific processing, orthographic familiarity, and phonological structure. Comparing consonant- and symbol sequences, the results showed significant differences in the P1 and N1 waveforms in the control but not in the dyslexic group. The reduced P1 and N1 effects in pre-adolescent children with dyslexia suggest a lack of visual specialization for letter-processing. The P1 and N1 components were not sensitive to the familiar vs. less familiar orthographic sequence contrast. The amplitude of the later N320 component was larger for phonologically legal (pseudowords) compared to illegal (consonant sequences) items in both controls and dyslexics. However, the topographic differences showed that the controls were more left-lateralized than the dyslexics. We suggest that the development of the mechanisms that support literacy skills in dyslexics is both delayed and follows a non-normal developmental path. This contributes to the hemispheric differences observed and might reflect a compensatory mechanism in dyslexics.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationAraújo, S., Bramão, I., Faísca, L., Petersson, K. M., & Reis, A. (2012). Electrophysiological correlates of impaired reading in dyslexic pre-adolescent children. Brain and cognition, 79(2), 79-88. https://doi.org/10.1016/j.bandc.2012.02.010pt_PT
dc.identifier.doi10.1016/j.bandc.2012.02.010pt_PT
dc.identifier.issn0278-2626
dc.identifier.slugcv-prod-996116
dc.identifier.urihttp://hdl.handle.net/10451/63698
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationESTUDO DOS PROCESSOS COGNITIVOS SUBJACENTES À PERTURBAÇÃO DE LEITURA E PERTURBAÇÃO DE NOMEAÇÃO VISUAL NA POPULAÇÃO DISLÉXICA
dc.relationMechanisms of Implicit Learning: From Artificial Grammars to Dyslexia
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S0278262612000334pt_PT
dc.subjectDyslexiapt_PT
dc.subjectERPpt_PT
dc.subjectOrthographic processingpt_PT
dc.subjectPhonological processingpt_PT
dc.titleElectrophysiological correlates of impaired reading in dyslexic pre-adolescent childrenpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumberSFRH/BD/28488/2006
oaire.awardNumberPTDC/PSI-PCO/110734/2009
oaire.awardTitleESTUDO DOS PROCESSOS COGNITIVOS SUBJACENTES À PERTURBAÇÃO DE LEITURA E PERTURBAÇÃO DE NOMEAÇÃO VISUAL NA POPULAÇÃO DISLÉXICA
oaire.awardTitleMechanisms of Implicit Learning: From Artificial Grammars to Dyslexia
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F28488%2F2006/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/Concurso para Projectos de I&D em todos os Domínios Científicos - 2009/PTDC%2FPSI-PCO%2F110734%2F2009/PT
oaire.citation.endPage88pt_PT
oaire.citation.issue2pt_PT
oaire.citation.startPage79pt_PT
oaire.citation.titleBrain and Cognitionpt_PT
oaire.citation.volume79pt_PT
oaire.fundingStreamConcurso para Projectos de I&D em todos os Domínios Científicos - 2009
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person.givenNameSusana
person.givenNameInês
person.givenNameLuís
person.givenNameKarl Magnus
person.givenNameAlexandra Isabel Dias Reis
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project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.cv.cienciaidF619-7368-0984 | Susana Araújo
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
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