Auditory neuropathy/auditory dys-synchrony in children with cochlear implants / Neuropatia auditiva/dessincronia auditiva em crianças usuárias de implante coclear

AUTOR(ES)

Ana Claudia de Freitas Martinho

DATA DE PUBLICAÇÃO

2007

RESUMO

Introduction: The electrical stimulation generated by the Cochlear Implant (CI) may improve the neural synchrony and hence contribute to the development of auditory skills in patients with Auditory Neuropathy / Auditory Dys-synchrony (AN/AD). Goal: The goal of the research was to evaluate the auditory performance and the characteristics of the electrically evoked compound action potential (ECAP) in a group of 18 cochlear implants recipients with AN/AD. The results were compared with the control group composed of cochlear implants recipients with sensorial hearing loss. Method: The auditory perception was evaluated by sound field thresholds and speech perception tests. To evaluate ECAPs characteristics, the threshold and amplitude of neural response together with the amplitude growth and recovery functions were evaluated at 80Hz stimulation rate. For the patients with AN/AD, the threshold and amplitude of neural response were also evaluated at 35Hz stimulation rate. Results: No significant statistical variance for the development of auditory skills was found when comparing children with AN/AD and the control group. The ECAPs characteristics variance between the patients with AN/AD and the control group at 80Hz stimulation rate as well as at 35Hz stimulation rate were also not statistically significant. Conclusion: The CI was seen as an efficient resource to develop auditory skills in 94% of the AN/AD patients considered by the research. The auditory perception benefits as well as the possibility tomeasure the ECAP showed that the electrical stimulation could compensate the neural dys-synchrony caused by the AN/AD. However, a unique clinical procedure cannot be proposed at this point. Therefore, a careful and complete evaluation of each AN/AD patient before recommending the Cochlear Implant is advised.

ASSUNTO(S)

auditory perception aurally disabled cochlear implants percepção auditiva deficiente auditivo implante coclear

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