Elizabeth Dinces1, Janie Chobot-Rhodd, Elyse Sussman. 1. Department of Otorhinolaryngology - Head and Neck Surgery, Albert Einstein College of Medicine, 3400 Bainbridge Ave, Bronx, NY 10467, USA. edinces@montefiore.org
Abstract
OBJECTIVE: The purpose of the current study was to longitudinally assess the development of automatic sound feature discrimination and compare it to behavioral discrimination in late-implanted cochlear implant users. METHODS: Scalp-recorded auditory evoked potentials (AEPs) and behavioral discrimination of frequency, duration and intensity differences within an oddball paradigm using complex stimuli were recorded in three late-implanted cochlear implant subjects beginning on turn-on day. RESULTS: Variable results were obtained in behavioral and AEPs that were consistent with the amount of pre-implant auditory experience each subject had. The best user showed rapid development of neurophysiologic indices of change detection along with improvement in behavioral and real-world auditory skills. In contrast, there were no recordable AEPs in the poorer CI user and there was little change in behavioral outcomes. CONCLUSION: There is evidence of utilization of usual auditory processing pathways in the AEPs of some children who receive cochlear implants late in their childhood. Some plasticity in the auditory cortical pathways may be present despite prolonged auditory deprivation in school-aged children who are late-implanted cochlear implant recipients.
OBJECTIVE: The purpose of the current study was to longitudinally assess the development of automatic sound feature discrimination and compare it to behavioral discrimination in late-implanted cochlear implant users. METHODS: Scalp-recorded auditory evoked potentials (AEPs) and behavioral discrimination of frequency, duration and intensity differences within an oddball paradigm using complex stimuli were recorded in three late-implanted cochlear implant subjects beginning on turn-on day. RESULTS: Variable results were obtained in behavioral and AEPs that were consistent with the amount of pre-implant auditory experience each subject had. The best user showed rapid development of neurophysiologic indices of change detection along with improvement in behavioral and real-world auditory skills. In contrast, there were no recordable AEPs in the poorer CI user and there was little change in behavioral outcomes. CONCLUSION: There is evidence of utilization of usual auditory processing pathways in the AEPs of some children who receive cochlear implants late in their childhood. Some plasticity in the auditory cortical pathways may be present despite prolonged auditory deprivation in school-aged children who are late-implanted cochlear implant recipients.
Authors: Liliane Aparecida Fagundes Silva; Maria Inês Vieira Couto; Fernanda C L Magliaro; Robinson Koji Tsuji; Ricardo Ferreira Bento; Ana Claudia Martinho de Carvalho; Carla Gentile Matas Journal: PLoS One Date: 2017-02-02 Impact factor: 3.240