Audiology - Communication Research
https://audiolcommres.org.br/article/doi/10.1590/2317-6431-2025-3062pt
Audiology - Communication Research
Artigo Original

Valores normativos para potencial evocado auditivo de tronco encefálico binaural em adultos

Normative values for binaural brainstem auditory evoked potential in adults

Antonio Pereira de Carvalho Filho; Hannalice Gottschalck Cavalcanti

http://dx.doi.org/10.1590/2317-6431-2025-3062pt Audiol. Commun. Res., vol.31, e3062, 2026
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Resumo

Objetivo: Analisar os valores do Potencial Evocado Auditivo de Tronco Encefálico Binaural (PEATE-BI) para gerar resultados normativos de amplitude e latência em adultos normo-ouvintes.

Métodos: O estudo clínico envolveu 28 participantes que passaram por anamnese e avaliação audiológica. Os que atenderam aos critérios de inclusão foram submetidos ao PEATE-BI com 2000 estímulos, com 21,1 cliques por segundo, intensidade de 80 dBnNA e polaridade rarefeita.

Resultados: Os resultados do PEATE-BI foram analisados por meio de estatísticas descritivas, incluindo média, desvio padrão e intervalo de confiança. Quando comparados com a literatura, mostraram que a diferença entre as respostas binaurais e monoaurais no tronco encefálico não foi expressiva. O estudo confirmou que a estimulação binaural aumenta a amplitude da resposta, devido à independência das vias auditivas. Os resultados deste estudo podem servir como padrão de normalidade para latência e amplitude do componente de interação binaural (binaural interaction component) em adultos normo-ouvintes. Não foram observadas diferenças significativas nas latências das ondas I, III e V entre as respostas monoaurais e binaurais. Em contrapartida, foi observado aumento significativo da amplitude da onda V sob estimulação binaural, em comparação à monoaural.

Conclusão: Foram estabelecidos valores de referência para o PEATE–BI em adultos com audição normal, incluindo latência e amplitude do componente de interação binaural. As medições das latências e amplitudes do PEATE–BI mostraram semelhanças entre as orelhas direita e esquerda dos ouvintes normais.

Palavras-chave

Vias auditivas; Latência; Potencial evocado; Adultos; Audição

Abstract

Purpose: To analyze the values of the Binaural Auditory Brainstem Response (BI–ABR) to generate normative results of amplitude and latency in normal-hearing adults.

Methods: The clinical study involved 28 participants who underwent anamnesis and audiological evaluation. Those who met the inclusion criteria were submitted to BI–ABR with 2000 stimuli, a presentation rate of 21.1 clicks per second, an intensity of 80 dBnHL, and rarefaction polarity.

Results: The results of the Binaural Auditory Brainstem Response (BI–ABR) were analyzed using descriptive statistics, including mean, standard deviation, and confidence interval. When compared with the literature, they show that the difference between binaural and monaural brainstem responses is not considerable. The study confirms that binaural stimulation increases response amplitude due to the independence of the auditory pathways. The results of this study can serve as a standard of normality for BIC latency and amplitude in normal-hearing adults. No significant differences were observed in wave I, III, and V latencies between the monaural and binaural responses. In contrast, a significant increase in wave V amplitude was observed under binaural stimulation compared to monaural stimulation.

Conclusion: Reference values were established for BI–ABR in adults with normal hearing, including latency and amplitude of the Binaural Interaction Component (BIC). The latency and amplitude measurements of the BI–ABR showed similarities between the right and left ears of normal-hearing individuals.

Keywords

Auditory pathways; Latency; Evoked potential; Adults; Hearing

Referências

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Submetido em:
19/05/2025

Aceito em:
26/11/2025

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