Impact of stimulus frequency and recording electrode on electrocochleography in Hybrid cochlear implant users

Viral D Tejani; Rachael L Carroll; Paul J Abbas; Carolyn J Brown

doi:10.1016/j.heares.2019.107815

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Impact of stimulus frequency and recording electrode on electrocochleography in Hybrid cochlear implant users

Journal article

Peer reviewed

Impact of stimulus frequency and recording electrode on electrocochleography in Hybrid cochlear implant users

Viral D Tejani, Rachael L Carroll, Paul J Abbas and Carolyn J Brown

Hearing research, Vol.384, pp.107815-107815

12/2019

DOI: 10.1016/j.heares.2019.107815

PMCID: PMC6913176

PMID: 31678892

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https://www.ncbi.nlm.nih.gov/pmc/articles/6913176View

Open Access

Abstract

This report explores the impact of recording electrode position and stimulus frequency on intracochlear electrocochleography (ECoG) responses recorded from six Nucleus L24 Hybrid CI users. Acoustic tone bursts (250 Hz, 500 Hz, 750 Hz, and 1000 Hz) were presented to the implanted ear via an insert earphone. Recordings were obtained from intracochlear electrodes 6 (most basal), 8, 10, 12, 14, 16, 18, 20, and 22 (most apical). Responses to condensation and rarefaction stimuli were subtracted from one another to emphasize hair cell responses (CM/DIF) and added to one another to emphasize neural responses (ANN/SUM). For a fixed stimulus frequency, the CM/DIF and ANN/SUM magnitudes increased as the recording electrode moved apically. For a fixed recording electrode, as the stimulus frequency was lowered, response magnitudes increased. The CM/DIF and ANN/SUM response phase were generally stable across recording electrodes, although substantial phase shifts were noted for a few conditions. Given the recent interest in ECoG for assessing peripheral auditory function in CI users, the impact of stimulus frequency and recording electrode position on response magnitude should be considered. Results suggest optimal ECoG responses are obtained using the most apical recording electrode and a low frequency acoustic stimulus (250 Hz or 500 Hz).

Cochlear Implants

Acoustic Stimulation

Aged

Aged, 80 and over

Audiometry, Evoked Response

Auditory Perception

Cochlear Implantation - instrumentation

Electric Stimulation

Hearing

Hearing Loss - physiopathology

Hearing Loss - psychology

Hearing Loss - rehabilitation

Humans

Middle Aged

Persons With Hearing Impairments - psychology

Persons With Hearing Impairments - rehabilitation

Predictive Value of Tests

Prosthesis Design

Details

Title: Subtitle: Impact of stimulus frequency and recording electrode on electrocochleography in Hybrid cochlear implant users
Creators: Viral D Tejani - Otolaryngology-Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, IA, USA; Communication Sciences and Disorders, University of Iowa, Iowa City, IA, USA. Electronic address: viral-tejani@uiowa.edu
Rachael L Carroll - Otolaryngology-Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, IA, USA; Communication Sciences and Disorders, University of Iowa, Iowa City, IA, USA
Paul J Abbas - Otolaryngology-Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, IA, USA; Communication Sciences and Disorders, University of Iowa, Iowa City, IA, USA
Carolyn J Brown - Otolaryngology-Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, IA, USA; Communication Sciences and Disorders, University of Iowa, Iowa City, IA, USA
Resource Type: Journal article
Publication Details: Hearing research, Vol.384, pp.107815-107815
DOI: 10.1016/j.heares.2019.107815
PMID: 31678892
PMCID: PMC6913176
NLM abbreviation: Hear Res
ISSN: 0378-5955
eISSN: 1878-5891
Grant note: P50 DC000242 / NIDCD NIH HHS
Language: English
Date published: 12/2019
Academic Unit: Communication Sciences and Disorders; Otolaryngology
Record Identifier: 9984211953302771

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