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Related Concept Videos

The Cochlea01:13

The Cochlea

45.7K
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.
45.7K
Hair Cells01:22

Hair Cells

41.1K
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.
41.1K

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Various Surgical Techniques for Cochlear Implantation in an Ossified Cochlea: A Systematic Review.

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Related Experiment Video

Updated: Aug 25, 2025

Enhancing Electrode Location Assessment in Cochlear Implantation via Computed Tomography Image Fusion
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Enhancing Electrode Location Assessment in Cochlear Implantation via Computed Tomography Image Fusion

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Cochlear Implantation: The Variation in Cochlear Height.

Afrah Alshalan1, Yassin Abdelsamad2, Majed Assiri1

  • 1Department of Otolaryngology, Neurotology & Lateral Skull Base Surgery, King Abdullah Ear Specialist Center (KAESC), King Saud University, Riyadh, Saudi Arabia.

Ear, Nose, & Throat Journal
|October 17, 2022
PubMed
Summary
This summary is machine-generated.

Cochlear height and other metrics correlate with cochlear duct length and speech outcomes in cochlear implant (CI) patients. Preoperative assessment of cochlear height is crucial for optimizing CI results.

Keywords:
cochlear anatomycochlear duct lengthcochlear implantelectrode designinsertion depth of electrode

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Area of Science:

  • Otolaryngology
  • Radiology
  • Audiology

Background:

  • Cochlear implant (CI) surgery aims to restore hearing.
  • Understanding cochlear morphology is vital for successful CI outcomes.
  • Preoperative assessment of cochlear dimensions can inform surgical planning.

Purpose of the Study:

  • To investigate associations between cochlear metrics (basal turn diameter, width, and height) and cochlear duct length.
  • To explore the relationship between cochlear metrics and hearing outcomes after CI.
  • To determine the clinical relevance of cochlear dimensions in CI candidates.

Main Methods:

  • Retrospective study of 65 CI patients (2012-2018) with preoperative high-resolution CT scans.
  • Inclusion criteria: normal cochlea, ≥2 years follow-up, Category Auditory Performance II (CAP-II), and Speech Intelligibility Rating (SIR) scores.
  • Analysis of correlations between cochlear metrics (A, B, H values) and cochlear duct length (CDL), CAP-II, and SIR scores.

Main Results:

  • Significant positive correlations found between basal turn diameter (A), basal turn width (B), and cochlear height (H) values (P < 0.05).
  • A, B, and H values showed significant positive relationships with cochlear duct length (CDL) (P < 0.0001).
  • Cochlear height (H) significantly correlated with Speech Intelligibility Rating (SIR) (P = 0.027), but not CAP-II (P = 0.62).

Conclusions:

  • Cochlear height, diameter, and width are interconnected and correlate with cochlear duct length.
  • Cochlear height is associated with speech intelligibility outcomes in CI patients.
  • Preoperative evaluation of cochlear metrics, particularly height, is recommended for optimizing CI candidacy and outcomes.