Optimizing non-invasive functional markers for cochlear deafferentation based on electrocochleography and auditory brainstem responses.
J Acoust Soc Am
; 151(4): 2802, 2022 04.
Article
in En
| MEDLINE
| ID: mdl-35461487
ABSTRACT
Accumulating evidence suggests that cochlear deafferentation may contribute to suprathreshold deficits observed with or without elevated hearing thresholds, and can lead to accelerated age-related hearing loss. Currently there are no clinical diagnostic tools to detect human cochlear deafferentation in vivo. Preclinical studies using a combination of electrophysiological and post-mortem histological methods clearly demonstrate cochlear deafferentation including myelination loss, mitochondrial damages in spiral ganglion neurons (SGNs), and synaptic loss between inner hair cells and SGNs. Since clinical diagnosis of human cochlear deafferentation cannot include post-mortem histological quantification, various attempts based on functional measurements have been made to detect cochlear deafferentation. So far, those efforts have led to inconclusive results. Two major obstacles to the development of in vivo clinical diagnostics include a lack of standardized methods to validate new approaches and characterize the normative range of repeated measurements. In this overview, we examine strategies from previous studies to detect cochlear deafferentation from electrocochleography and auditory brainstem responses. We then summarize possible approaches to improve these non-invasive functional methods for detecting cochlear deafferentation with a focus on cochlear synaptopathy. We identify conceptual approaches that should be tested to associate unique electrophysiological features with cochlear deafferentation.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Audiometry, Evoked Response
/
Evoked Potentials, Auditory, Brain Stem
Limits:
Humans
Language:
En
Journal:
J Acoust Soc Am
Year:
2022
Type:
Article
Affiliation country:
United States