Keywords
Auditory thresholds, neuropathy spectrum disorder, cortical auditory evoked potentials
Abstract
Purpose: Auditory threshold estimation using the auditory brainstem response or auditory steady state response is limited in some populations (e.g., individuals with auditory neuropathy spectrum disorder [ANSD] or those who have difficulty remaining still during testing and cannot tolerate general anesthetic). However, cortical auditory evoked potentials (CAEPs) can be recorded in many such patients and have been employed in threshold approximation. Thus, we studied CAEP estimates of auditory thresholds in participants with normal hearing, sensorineural hearing loss, and ANSD. Method: We recorded CAEPs at varying intensity levels to speech (i.e., /ba/) and tones (i.e., 1 kHz) to estimate auditory thresholds in normal-hearing adults (n = 10) and children (n = 10) and case studies of children with sensorineural hearing loss and ANSD. Results: Results showed a pattern of CAEP amplitude decrease and latency increase as stimulus intensities declined until waveform components disappeared near auditory threshold levels. Overall, CAEP thresholds were within 10 dB HL of behavioral thresholds for both stimuli. Conclusions: The above findings suggest that CAEPs may be clinically useful in estimating auditory threshold in populations for whom such a method does not currently exist. Physiologic threshold estimation in difficult-to-test clinical populations could lead to earlier intervention and improved outcomes.
Original Publication Citation
Cardon, G., Sharma, A. (2020) Cortical neurophysiological correlates of auditory threshold in adults and children with normal hearing and Auditory Neuropathy Spectrum Disorder. American Journal of Audiology. 2 Dec 2020
BYU ScholarsArchive Citation
Cardon, Garrett and Sharma, Anu, "Cortical Neurophysiologic Correlates of Auditory Threshold in Adults and Children With Normal Hearing and Auditory Neuropathy Spectrum Disorder" (2020). Faculty Publications. 7578.
https://scholarsarchive.byu.edu/facpub/7578
Document Type
Peer-Reviewed Article
Publication Date
2020
Publisher
American Journal of Audiology
Language
English
College
David O. McKay School of Education
Department
Communication Disorders
Copyright Status
Copyright © 2020 American Speech-Language-Hearing Association
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