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Related Concept Videos

The Cochlea01:13

The Cochlea

41.1K
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.
41.1K
Hair Cells01:22

Hair Cells

36.3K
Hair cells are the sensory receptors of the auditory system—they transduce mechanical sound waves into electrical energy that the nervous system can understand. Hair cells are located in the organ of Corti within the cochlea of the inner ear, between the basilar and tectorial membranes. The actual sensory receptors are called inner hair cells. The outer hair cells serve other functions, such as sound amplification in the cochlea, and are not discussed in detail here.
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Anatomy of the Ear01:16

Anatomy of the Ear

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Auditory sensation, commonly called hearing, involves the transformation of sonic waves into neural impulses facilitated by the structures of the auditory organ. The prominent, flesh-like structure on the side of the head, called the auricle, directs sound waves towards the auditory canal. The auricle is often mislabeled as the pinna, a term more aligned with mobile structures like a feline's external ear. The auditory canal penetrates the cranium via the external auditory meatus of the...
11.5K
Auditory Pathway01:15

Auditory Pathway

7.2K
Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking...
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Related Experiment Video

Updated: May 7, 2026

The Miniature Pig: A Large Animal Model for Cochlear Implant Research
06:16

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Published on: July 28, 2022

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Functional simulation of the cochlea for implant optimization.

Mario Ceresa, Frederic Perez, Sergio Vera

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
    |October 11, 2013
    PubMed
    Summary

    Cochlear implantation outcomes vary due to anatomical differences and placement errors. A new finite element model simulates cochlear mechanics, accounting for patient variability to improve hearing restoration surgery.

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    Area of Science:

    • Biomedical Engineering
    • Computational Mechanics
    • Auditory Neuroscience

    Background:

    • Cochlear implantation aims to restore hearing in severe to profound hearing loss.
    • Surgical outcomes show significant inter-patient variability.
    • Anatomical differences and implant placement impact efficacy.

    Purpose of the Study:

    • To develop a functional finite element model of the cochlea.
    • To incorporate inter-patient anatomical variability into the model.
    • To simulate cochlear implant electrode placement and its effects.

    Main Methods:

    • A finite element model was developed for the cochlea.
    • The cochlear partition was modeled as an elastic solid with finite deformation.
    • Perilymph fluid was modeled as a compressible, viscous fluid.
    • The interaction between fluid and partition was captured.

    Main Results:

    • The model successfully captured the biomechanical interaction within the cochlea.
    • Numerical simulations demonstrated the cochlear partition's response to varying stimulation frequencies.
    • The model's ability to incorporate anatomical variability was established.

    Conclusions:

    • A novel finite element model can simulate cochlear mechanics with patient-specific variability.
    • This model offers a tool to optimize cochlear implant design and placement.
    • Improved simulation capabilities may lead to more predictable and effective hearing restoration outcomes.