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- Title
Remediation effects on N170 and P300 in children with developmental dyslexia.
- Authors
Jucla, Mélanie; Nenert, Rodolphe; Chaix, Yves; Demonet, Jean-François
- Abstract
This study aimed at investigating the ERP correlates (N170 and P300 components) of a multimodal training program focused in dyslexia. ERPs were obtained from 32 electrodes in 24 French children with developmental dyslexia (mean age 10 years 7 months) during a visual lexical decision task. All the children received two intensive two-month evidence-based training programs: one based on phonemic awareness and the other on visual and orthographic processing in a cross-over design. Ten control children matched on chronological age were also tested. We showed dissociation between N170, P300 and behavioral improvement. In the dyslexic group, P300 amplitude decreased for non-words and words as the latter yielded performance improvement. In the control group, the same effect was observed for pseudo-words. At the same time, the opposite pattern occurred for the N170 latency, which was shortened for pseudo-words and pseudo-homophones in the dyslexic group and for words in the typically achieving children. We argue that training might modulate cortical activity in dyslexic children in a visual word recognition task. Considering the well-known implication of P300 in attentional processes, our results reflect the strong link between reading skill improvement after remediation and visual attentional process maturation.
- Subjects
DYSLEXIA; DEVELOPMENTAL disabilities; READING ability testing; VISUAL learning; PHONEMICS; REMEDIAL reading teaching; PHONOLOGY; EVIDENCE-based medicine; FRENCH people
- Publication
Behavioural Neurology, 2010, Vol 22, Issue 3/4, p121
- ISSN
0953-4180
- Publication type
Article
- DOI
10.1155/2010/913692