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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: Jun 16, 2026

Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process

Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process

Published on: June 21, 2024

Electric Auditory Brainstem Response Audiometry in Cochlear Implants: New Recording Paradigm.

Takwa Gabr¹, Hossam Debis², Ahmed Hafez³

¹Audiovestibular Medicine Unit, Faculty of Medicine, Kafrelsheikh University, Elgeesh Street, Kafrelsheikh 33516, Egypt.

Audiology Research

|July 25, 2024

Summary

Recording electrically evoked auditory brainstem responses (E-ABR) from adjacent cochlear implant channels is faster and reliable. This method effectively assesses hearing in patients without compromising E-ABR results.

Keywords:

channel interaction cochlear implants combined recording electric ABR

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Last Updated: Jun 16, 2026

Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process

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Published on: June 21, 2024

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Cochlear Implant Surgery and Electrically-evoked Auditory Brainstem Response Recordings in C57BL/6 Mice

Cochlear Implant Surgery and Electrically-evoked Auditory Brainstem Response Recordings in C57BL/6 Mice

Published on: January 9, 2019

Area of Science:

Audiology
Neuroscience
Biomedical Engineering

Background:

Cochlear implants (CIs) restore hearing for severe to profound hearing loss.
Electrically evoked auditory brainstem response (E-ABR) assesses CI function.
E-ABR can be recorded from different cochlear regions (apical, middle, basal).

Purpose of the Study:

To compare E-ABR recordings from individual CI channels versus combined adjacent channels.
To evaluate the reliability and efficiency of different E-ABR recording methods.
To investigate the correlation between E-ABR amplitude and current level in combined recordings.

Main Methods:

Included 17 children with unilateral cochlear implants.
Performed impedance measurement, ECAP, and E-ABR recordings from apical, middle, and basal channels.
Compared individual channel E-ABR with simultaneous separated and adjacent combined channel recordings.

Main Results:

E-ABR latencies and amplitudes were similar across individual and combined recording methods.
Combined adjacent channel E-ABR amplitudes positively correlated with applied current levels.
No compromise in E-ABR results was observed with combined recording techniques.

Conclusions:

Combined E-ABR recording from adjacent channels is a faster and more reliable technique.
This method can be effectively utilized in clinical settings.
Adjacent channel E-ABR recording provides valid and comparable results to individual channel recordings.