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Brainstem Encoding of Aided Speech in Hearing Aid Users with Cochlear Dead Region(s)
Hassaan, Mohammad Ramadan; Ibraheem, Ola Abdallah; Galhom, Dalia Helal.
Afiliação
  • Hassaan, Mohammad Ramadan; Zagazig University. Faculty of Medicine. Otorhinolaryngology department. Zagazig. EG
  • Ibraheem, Ola Abdallah; Zagazig University. Faculty of Medicine. Otorhinolaryngology department. Zagazig. EG
  • Galhom, Dalia Helal; Zagazig University. Faculty of Medicine. Otorhinolaryngology department. Zagazig. EG
Int. arch. otorhinolaryngol. (Impr.) ; 20(3): 226-234, July-Sept. 2016. tab, graf
Artigo em Inglês | LILACS | ID: lil-795198
Biblioteca responsável: BR1.1
ABSTRACT
Abstract Introduction Neural encoding of speech begins with the analysis of the signal as a whole broken down into its sinusoidal components in the cochlea, which has to be conserved up to the higher auditory centers. Some of these components target the dead regions of the cochlea causing little or no excitation. Measuring aided speechevoked auditory brainstem response elicited by speech stimuli with different spectral maxima can give insight into the brainstem encoding of aided speech with spectral maxima at these dead regions. Objective This research aims to study the impact of dead regions of the cochlea on speech processing at the brainstem level after a long period of hearing aid use. Methods This study comprised 30 ears without dead regions and 46 ears with dead regions at low, mid, or high frequencies. For all ears, we measured the aided speechevoked auditory brainstem response using speech stimuli of low,mid, and high spectral maxima. Results Aided speech-evoked auditory brainstem response was producible in all subjects. Responses evoked by stimuli with spectral maxima at dead regions had longer latencies and smaller amplitudes when compared with the control group or the responses of other stimuli. Conclusion The presence of cochlear dead regions affects brainstem encoding of speech with spectral maxima perpendicular to these regions. Brainstem neuroplasticity and the extrinsic redundancy of speech can minimize the impact of dead regions in chronic hearing aid users.
Assuntos

Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: LILACS Assunto principal: Percepção da Fala / Potenciais Evocados Auditivos do Tronco Encefálico / Auxiliares de Audição Limite: Adolescente / Adulto / Humanos Idioma: Inglês Revista: Int. arch. otorhinolaryngol. (Impr.) Assunto da revista: Otorrinolaringologia Ano de publicação: 2016 Tipo de documento: Artigo País de afiliação: Egito Instituição/País de afiliação: Zagazig University/EG

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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: LILACS Assunto principal: Percepção da Fala / Potenciais Evocados Auditivos do Tronco Encefálico / Auxiliares de Audição Limite: Adolescente / Adulto / Humanos Idioma: Inglês Revista: Int. arch. otorhinolaryngol. (Impr.) Assunto da revista: Otorrinolaringologia Ano de publicação: 2016 Tipo de documento: Artigo País de afiliação: Egito Instituição/País de afiliação: Zagazig University/EG
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