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Updated: Jul 13, 2025
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Cochlear Implant Surgery and Electrically-evoked Auditory Brainstem Response Recordings in C57BL/6 Mice
Published on: January 9, 2019
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Normal linear and non-linear cochlear mechanisms and efferent system functioning in individuals with misophonia
Urs Suraj1, Kavassery Venkateswaran Nisha2, Prashanth Prabhu2
1Department of Audiology, All India Institute of Speech and Hearing, Manasagangothri, Mysuru, 570 006, Karnataka, India. surajursbr@gmail.com.
Summary
This study found no significant differences in outer hair cell function or efferent auditory system activity between individuals with and without misophonia, suggesting these auditory mechanisms are not primary causes of the condition.
Area of Science:
- Auditory Neuroscience
- Psychoacoustics
- Otoacoustic Emissions
Background:
- Misophonia involves strong emotional responses to specific sounds.
- The auditory mechanisms underlying misophonia are debated.
- Investigating outer hair cell and efferent auditory functioning is crucial.
Purpose of the Study:
- To examine non-linear and linear outer hair cell functioning in misophonia.
- To assess auditory efferent functioning in individuals with misophonia.
- To determine the role of cochlear and efferent systems in misophonia.
Main Methods:
- Included 40 ears with misophonia and 37 ears without, all with normal hearing.
- Measured transient evoked otoacoustic emissions (TEOAEs) and distortion product otoacoustic emissions (DPOAEs).
- Recorded otoacoustic emissions under conditions with and without contralateral noise.
Main Results:
- No significant differences in TEOAE or DPOAE amplitudes between groups.
- No significant differences in the suppression magnitude of TEOAEs or DPOAEs.
- Auditory efferent function showed no significant group differences.
Conclusions:
- Cochlear and efferent auditory systems may not be major contributors to misophonia.
- The examined auditory underpinnings do not appear to drive misophonia.
- Further research into other mechanisms of misophonia is warranted.
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