Abstract
ABSTRACTObjective To analyze the latency and the amplitude values of Mismatch Negativity and P300 cognitive potential in children with stuttering, with no auditory complaints, with auditory thresholds within the normality range, comparing them to the findings of a Control Group.Methods A cross-sectional study involving 50 children of both sexes, 15 with stuttering and 35 without stuttering, aged 6 to 11 years, with no diagnosis of ear pathology or other diseases. All children were submitted to peripheral audiological evaluation (meatoscopy, pure tone testing, speech audiometry, and acoustic immittance measures) and a central audiological evaluation (investigation of the Mismatch Negativity and P300 cognitive potential). For the evaluation of fluency, all children with stuttering had a specific history taken and were video recorded in a spontaneous speech. Afterwards, the transcription was done, followed by speech analysis to classify children according the severity of stuttering.Results There was a significant difference in the latencies of Mismatch Negativity and P300 cognitive potential, as well as in the amplitude of Mismatch Negativity.Conclusion There was a significant delay in the latencies of Mismatch Negativity and P300 cognitive potential, as well as increase in the amplitude of the Mismatch Negativity in children with stuttering when compared to children in the Control Group. Changes in the morphology of the waves were found in the Stuttering Group.
Highlights
Houve excelente concordância entre juízes na análise da severidade da gagueira (Kappa 0,82), bem como na análise dos componentes dos potenciais evocados auditivos de longa latência (PEALL) Mismatch Negativity (MMN) e P300 (Kappa 0,89)
Non-linguistic auditory processing in stuttering: evidence from behavior and event-related brain potentials
Summary
Objetivo: Analisar os valores de latência e amplitude do Mismatch Negativity e potencial cognitivo P300 em crianças com gagueira, sem queixas auditivas, com limiares auditivos dentro dos padrões de normalidade, comparando aos achados de um Grupo Controle. Todas as crianças realizaram avaliação audiológica periférica (meatoscopia, audiometria tonal, audiometria vocal e medidas de imitância acústica) e avaliação audiológica central (Mismatch Negativity e potencial cognitivo P300). As crianças com gagueira realizaram anamnese específica, seguida da filmagem de uma fala espontânea, que foi transcrita e analisada quanto à severidade da gagueira. Resultados: Houve diferença significativa nas latências do Mismatch Negativity e do potencial cognitivo P300, assim como na amplitude do Mismatch Negativity. Conclusão: Verificou-se atraso nas latências do Mismatch Negativity e potencial cognitivo P300 nas crianças com gagueira, assim como aumento na amplitude do Mismatch Negativity, ao serem comparados com crianças do Grupo Controle. No Grupo com Gagueira foram igualmente identificadas alterações na morfologia das ondas
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