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The Cochlea

The Cochlea

The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.

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Related Experiment Video

Updated: Jul 9, 2025

Performing Intracochlear Electrocochleography During Cochlear Implantation

Performing Intracochlear Electrocochleography During Cochlear Implantation

Published on: March 8, 2022

Caloric function as a predictor of cochlear implant performance.

Alexandra E Quimby¹, Christopher Z Wen², Michael J Ruckenstein¹

¹Department of Otorhinolaryngology-Head & Neck Surgery, University of Pennsylvania, Philadelphia, PA, USA.

Cochlear Implants International

|November 30, 2023

Summary

Cochlear implantation (CI) affects vestibular function, impacting hearing outcomes. Pre- and post-implantation vestibular tests can help predict cochlear implant (CI) performance in patients.

Keywords:

Cochlear implant caloric vestibular

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Last Updated: Jul 9, 2025

Performing Intracochlear Electrocochleography During Cochlear Implantation

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Published on: March 8, 2022

Author Spotlight: Advancements in Impedance Monitoring for Cochlear Implant Surgery

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Published on: August 4, 2023

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages

Published on: March 24, 2023

Area of Science:

Otolaryngology
Neuroscience
Audiology

Background:

Cochlear implantation (CI) can alter vestibular function.
The relationship between vestibular changes and CI performance is not fully understood.

Purpose of the Study:

To investigate if caloric vestibular responses post-cochlear implantation can predict hearing performance.

Main Methods:

Retrospective analysis of 43 patients undergoing CI with pre- and post-operative videonystagmography (VNG).
Caloric responses were compared pre- and post-implantation.
Prediction of AzBio +10 dB S/N scores was assessed.

Main Results:

A significant decrease in caloric response was observed in the implanted ear post-CI (p=0.02).
Pre- and post-implantation caloric responses predicted CI performance at various time points.
Changes in caloric response did not correlate with CI performance.

Conclusions:

Cochlear implantation impacts vestibular function, evidenced by altered caloric responses.
Vestibular function metrics before and after CI may predict aspects of CI performance variability.