Potencial evocado auditivo de tronco encefálico com estímulo de fala em crianças com distúrbio fonológico / Speech-evoked auditory brainstem responses in children with phonological disorders

AUTOR(ES)

Isabela Crivellaro Goncalves

DATA DE PUBLICAÇÃO

2009

RESUMO

INTRODUCTION: The Auditory Brainstem Response (ABR) is an objective measure that evaluates the integrity of the brainstem auditory pathway and that supplements the routine audiological procedures in the diagnosis of hearing impairment. Nowadays, studies have been developed in order to characterize the auditory evoked potentials obtained through speech stimuli that are spectrally and temporally more complex than the click stimuli. AIM: To characterize the click- and the speech-evoked ABR in children with a diagnosis of phonological disorder. METHODS: Auditory Brainstem Responses to both a click and speech stimulus (syllable /da/) were recorded in 36 children with normal bilateral hearing, with ages ranging from seven to 11 years old - 18 children with typical development (Control Group - CG) and 18 children clinically diagnosed with a phonological disorder (Study Group - SG). The quantitative data analysis was performed through the unpaired T Student test. Values of mean, median, standard deviation, minimum and maximum, and p-value were obtained for the between group comparison. The qualitative data analysis was performed through the Fishers Exact Test. The occurrence of normal and abnormal results was compared between groups. The relationship between the results of speech-evoked ABR and the PCC-R index (Percentage of consonants corrects Revised) of the SG was established by Pearsons correlation. RESULTS: In the click-evoked ABR, a statistically significant difference was observed on the between groups analysis for latency values of waves I, III and V in both ears, with higher latency values for the study group. However, no between group differences were observed in the qualitative data analysis regarding the occurrence of normal and abnormal results. In the speech-evoked ABR, a statistically significant difference was observed on the between groups analysis for the latency values of waves V and A. Similarly, a statistically significant difference between groups was observed on the qualitative data analysis of latencies of waves V and A when comparing the occurrence of normal and abnormal results. No significant correlations between the results of speechevoked ABR and the PCC-R index were observed in the group of children with phonological disorder. Conclusion: Children with phonological disorders present abnormal results in the speech-evoked ABR when compared to typically developing children. This was evidenced by the delay in conducting the electrical impulse through the brainstem, suggesting the existence of auditory pathway disorders in this region

ASSUNTO(S)

transtornos da articulação child evoked potentials auditory brain stem potenciais evocados auditivos de tronco encefálico articulation disorders. criança auditory evoked potentials potenciais evocados auditivos

Documentos Relacionados

• Potencial evocado auditivo de tronco encefálico com estímulo de fala
• Speech-evoked Brainstem Auditory Responses and Auditory Processing Skills: A Correlation in Adults with Hearing Loss
• Gender differences in binaural speech-evoked auditory brainstem response: are they clinically significant?
• Potencial evocado auditivo de longa latência para o estímulo de fala apresentado com diferentes transdutores em crianças normais
• Potencial evocado auditivo de tronco encefálico em crianças com exposição ao chumbo