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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.

The Auditory Ossicles

The Auditory Ossicles

The auditory ossicles of the middle ear transmit sounds from the air as vibrations to the fluid-filled cochlea. The auditory ossicles consist of two malleus (hammer) bones, two incus (anvil) bones, and two stapes (stirrups), one on each side. These bones develop during the fetal stage and are the ones to ossify first. They are fully mature at birth and do not grow afterward.
The aptly named stapes look very much like a stirrup. The three ossicles are unique to mammals, and each plays a role in...

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Related Experiment Video

Updated: Jun 29, 2026

Robotic Cochlear Implantation for Direct Cochlear Access

Robotic Cochlear Implantation for Direct Cochlear Access

Published on: June 16, 2022

[Cochlear implantation in the ossified cochlear].

Yong-Xin Li¹, Shuang Lang, Xiao-Tian Zhao

¹Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital University of Medical Science, Beijing 100730, China.

Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi = Chinese Journal of Otorhinolaryngology Head and Neck Surgery

|October 2, 2008

Summary

This summary is machine-generated.

Cochlear ossification presents surgical challenges for multichannel cochlear implantation. Despite difficulties, patients with ossified cochleas, particularly after meningitis, can achieve auditory sensation and benefit from the procedure.

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Robotic Cochlear Implantation for Direct Cochlear Access

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Published on: June 16, 2022

Performing Intracochlear Electrocochleography During Cochlear Implantation

Performing Intracochlear Electrocochleography During Cochlear Implantation

Published on: March 8, 2022

Area of Science:

Otolaryngology
Neurosurgery
Biomedical Engineering

Context:

Cochlear ossification, often a sequela of meningitis, complicates cochlear implantation.
Multichannel cochlear implantation aims to restore hearing in patients with severe to profound sensorineural hearing loss.
Surgical outcomes in ossified cochleas require careful evaluation of preoperative conditions and surgical techniques.

Purpose:

To explore challenges and describe clinical experiences with multichannel cochlear implantation in patients with cochlear ossification.
To detail preoperative evaluation, surgical decision-making, and insertion techniques for ossified cochleas.
To assess the safety and efficacy of cochlear implantation in this patient cohort.

Summary:

Retrospective review of seven cases with bilateral cochlear ossification, four due to meningitis.
Surgical insertion of cochlear implant arrays varied based on the degree of ossification, with full insertion in four cases.
Post-implantation, all patients experienced auditory sensations, with no severe complications; electrode impedance and auditory thresholds were slightly elevated.

Impact:

Highlights the potential benefits of cochlear implantation for patients with ossified cochleas, even post-meningitis.
Emphasizes the degree of ossification and complete electrode insertion as key factors for successful outcomes.
Suggests increased attention for profound sensorineural hearing loss patients following meningitis, considering cochlear implantation.