Title

Fast Click Rate Electrocochleography and Auditory Brainstem Response in Normal-Hearing Adults Using Continuous Loop Averaging Deconvolution

Authors

Wafaa A. Kaf, Missouri State UniversityFollow
Kelly M. Lewis, MSU Graduate Student
Erdem Yavuz
Samantha M. Dixon, MSU Graduate Student
Mark Van Ess
Abdullah M. Jamos, Missouri State UniversityFollow
Rafael E. Delgado

Abstract

Objectives: Using the continuous loop averaging deconvolution (CLAD) technique for conventional electrocochleography (ECochG) and auditory brainstem response (ABR) recordings, the effects of testing at high stimulus rates may have the potential to diagnose disorders of the inner ear and auditory nerve. First, a body of normative data using the CLAD technique must be established.

Design: Extratympanic click ECochG and ABR to seven stimulus rates using CLAD were measured simultaneously from a tympanic membrane electrode and surface electrodes on the forehead and mastoid of 42 healthy individuals.

Results: Results showed that the compound action potential (AP) of the ECochG and waves I, III, and V of the ABR decreased in amplitude and increased in latency as stimulus rate was increased from standard 7.1 clicks/s up to 507.81 clicks/s, with sharp reduction in AP amplitude at 97.66 clicks/s and reaching asymptote at 292.97 clicks/s. The summating potential (SP) of the ECochG, however, stayed relatively stable, resulting in increased SP/AP ratios with increasing rate. The SP/AP amplitude ratio showed more stability than AP amplitude findings, thus it is recommended for use in evaluation of cochlear and neural response.

Conclusions: Results of both amplitude and latency data from this normative neural adaptation function of the auditory pathway serves as guide for improving diagnostic utility of both ECochG and ABR using CLAD as a reliable technique in distinguishing inner ear and auditory nerve disorders.

Department(s)

Communication Sciences and Disorders

Document Type

Conference Proceeding

DOI

https://doi.org/10.1097/AUD.0000000000000381

Keywords

Auditory brainstem response, Continuous loop averaging deconvolution technique, Electrocochleography, Fast click rates, Neural adaptation

Publication Date

1-1-2017

Recommended Citation

Kaf, Wafaa A., Kelly M. Lewis, Erdem Yavuz, Samantha M. Dixon, Mark Van Ess, Abdullah M. Jamos, and Rafael E. Delgado. "Fast click rate electrocochleography and auditory brainstem response in normal-hearing adults using continuous loop averaging deconvolution." Ear and hearing 38, no. 2 (2017): 244-254.

Journal Title

Ear and Hearing