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Related Concept Videos

The Cochlea01:13

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 12, 2026

Testing a Cochlear Implant Electrode Insertion Training System for Optimal Electrode Array Placement in Different Inner Ear Anatomies
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Published on: February 6, 2026

Developmental changes in cochlear orientation--implications for cochlear implantation.

Simon K W Lloyd1, Anand V Kasbekar, Bruno Kenway

  • 1Department of Otolaryngology, Manchester Royal Infirmary, Manchester, UK. sklloyd@me.co.uk

Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [And] European Academy of Otology and Neurotology
|May 27, 2010
PubMed
Summary
This summary is machine-generated.

Cochlear orientation changes with age, showing a significant reduction in basal turn angle as individuals get older. This age-related change in cochlear angulation may impact cochlear implantation outcomes.

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Last Updated: Jun 12, 2026

Testing a Cochlear Implant Electrode Insertion Training System for Optimal Electrode Array Placement in Different Inner Ear Anatomies
07:34

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Enhancing Electrode Location Assessment in Cochlear Implantation via Computed Tomography Image Fusion
03:58

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

Published on: January 17, 2025

Area of Science:

  • Otolaryngology
  • Radiology
  • Anatomy

Background:

  • Cochlear orientation is crucial for successful cochlear implantation.
  • Age-related anatomical changes in the cochlea are not fully understood.
  • Understanding cochlear angulation variations is essential for surgical planning.

Purpose of the Study:

  • To quantify age-related changes in cochlear basal turn angulation.
  • To assess the implications of these changes for cochlear implantation procedures.

Main Methods:

  • Cross-sectional study analyzing computed tomographic (CT) scans of 318 temporal bones from 159 patients (age 9 months to 85 years).
  • Measurement of the basal turn angle of the cochlea relative to the midsagittal plane.
  • Statistical analysis using 1-way ANOVA to determine age-related significance; inter- and intraobserver reliability assessed.

Main Results:

  • A statistically significant reduction in basal turn angle was observed with increasing age (p = 0.002).
  • The majority of this angular change occurred between ages 11 and 15 years.
  • Difficult cochlear implantation cases exhibited basal turn angles at the upper limit of the normal range.

Conclusions:

  • Cochlear basal turn angulation significantly decreases with age.
  • While measurement error exists, the trend is statistically significant.
  • The more obtuse angulation in children may influence cochlear implantation strategies.