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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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Extracting the Cochlea from a Human Temporal Bone: A Cadaveric Protocol
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The Cochlear Size Variations in Incomplete Partitions with Multiplanar Images on Pediatric Temporal Bone CT.

Direnc Ozlem Aksoy1, Emine Meltem1, Yesim Karagoz1

  • 1Department of Radiology, University of Health Sciences Türkiye, Istanbul Training and Research Hospital, Istanbul, Türkiye.

Sisli Etfal Hastanesi Tip Bulteni
|October 30, 2023
PubMed
Summary

High-resolution CT scans reveal distinct cochlea dimensions in incomplete partition (IP) malformations. These measurements, including cochlear length (A) and width (B), aid in differentiating IP types from normal cochleae.

Keywords:
Cochleacochlear measurementsincomplete partitiontemporal CT

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Area of Science:

  • Otolaryngology
  • Radiology
  • Anatomy

Background:

  • Incomplete partition (IP) malformations are congenital inner ear anomalies.
  • Accurate diagnosis of IP malformations is crucial for appropriate management.
  • High-resolution computed tomography (HRCT) is a key imaging modality for evaluating inner ear structures.

Purpose of the Study:

  • To evaluate cochlea dimensions using multiplanar reconstruction of HRCT.
  • To determine if these dimensions can aid in diagnosing incomplete partition (IP) malformations.

Main Methods:

  • HRCT scans of 32 patients with IP defects (64 cochleae) and 38 control cochleae were analyzed.
  • Measurements included basal turn length (BL), cochlear height (CH), mid-apical length (MAL), cochlear length (A), and cochlear width (B).
  • Statistical analysis compared dimensions between IP types and controls.

Main Results:

  • IP types I and III showed significantly shorter MAL than controls.
  • IP type III also had shorter BL values compared to controls.
  • Cochlear length (A) and width (B) were significantly lower in IP types I and III, with a positive correlation between A and B.

Conclusions:

  • Quantitative differences in cochlea size and shape in IP cases can help differentiate them from normal cochleae.
  • The positive correlation between A and B suggests these values can estimate cochlear duct length (CDL) in IP types.