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Related Concept Videos

The Cochlea01:13

The Cochlea

50.6K
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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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...
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Related Experiment Video

Updated: Jan 17, 2026

Author Spotlight: Advancements in Impedance Monitoring for Cochlear Implant Surgery
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Optical coherence tomography-based cochlear endoscopy through the human round window membrane.

Julianna M Bordas, Wihan Kim, Michael J Serafino

    Optics Letters
    |September 16, 2025
    PubMed
    Summary
    This summary is machine-generated.

    A redesigned optical coherence tomography (OCT) endoscope improves imaging of the human cochlea. This new device enhances navigation and visibility, paving the way for diagnosing inner ear hearing disorders.

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    Area of Science:

    • Otolaryngology
    • Biomedical Engineering
    • Medical Imaging

    Background:

    • The human cochlea is challenging to image due to its delicate structure and location.
    • Optical coherence tomography (OCT) excels at imaging cochlear morphology and function in animal models.
    • Previous OCT endoscope designs faced clinical usability challenges.

    Purpose of the Study:

    • To present a redesigned OCT endoscope for non-invasive human cochlea imaging.
    • To overcome limitations of previous designs, enhancing navigation and visibility.
    • To advance the clinical application of OCT for inner ear diagnostics.

    Main Methods:

    • Redesigned hand-held OCT endoscope with reduced size and improved visibility.
    • Incorporation of a forward-looking fiber bundle and camera for enhanced navigation.
    • Validation using an opal checkerboard target and a cadaver temporal bone.

    Main Results:

    • Successful navigation to the round window niche via the ear canal was demonstrated.
    • The redesigned endoscope allows for detailed, real-time imaging of cochlear structures.
    • The device addresses previous limitations in size, visibility, and navigation.

    Conclusions:

    • The redesigned OCT endoscope represents a significant step towards clinical application.
    • This technology facilitates improved diagnosis and treatment of inner ear hearing disorders.
    • Non-invasive, high-resolution imaging of the human cochlea is now more feasible.