Impaired duration mismatch negativity in developmental dyslexia.

Full Abstract

A mismatch negativity event-related potential protocol was administered to dyslexic children and their respective controls to test whether a specific auditory deficit concerning phonetic processing or a lower level auditory processing deficit was present in developmental dyslexia. Three different contrast conditions were explored, including nonphonological sounds, contrasted in pitch and duration, and phonemes. Mismatch negativity amplitudes differed significantly between groups in the duration condition, whereas no differences were found in the frequency and phoneme conditions. Moreover, the dyslexic children had delayed mismatch negativity latencies in the three contrast conditions. Our results suggest a deficit in low-level auditory discrimination in dyslexic children, in particular when detecting stimulus duration, and support the rapid auditory processing theory of dyslexia.

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Author information

Author/s: Corbera, Sílvia (S); Escera, Carles (C); Artigas, Josep (J);

Affiliation: Cognitive Neuroscience Research Group, Department of Psychiatry and Clinical Psychobiology, University of Barcelona, Barcelona, Spain.

Journal and publication information

Publication Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't

Journal: Neuroreport (Neuroreport), published in England. (Language: eng)

Reference: 2006-Jul; vol 17 (issue 10) : pp 1051-5

Dates: Created 2006/06/22; Completed 2006/09/08; Revised 2006/11/15;

PMID: 16791102, status: MEDLINE (last retrieval date: 12/26/2008)

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Acoustic Stimulation - methods
Adolescent
Auditory Perceptual Disorders - etiology
Child
Contingent Negative Variation - physiology
Dose-Response Relationship, Radiation

Dose-Response Relationship, Radiation
Dyslexia - complications
Electroencephalography - methods
Female
Humans
Male

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