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Related Concept Videos

The Cochlea01:13

The Cochlea

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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.
52.0K

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Related Experiment Video

Updated: Mar 9, 2026

Behavioral Determination of Stimulus Pair Discrimination of Auditory Acoustic and Electrical Stimuli Using a Classical Conditioning and Heart-rate Approach
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Intracochlear Pressure Changes due to 2 Electrode Types: An Artificial Model Experiment.

Philipp Mittmann1, Marlene Mittmann1, Arneborg Ernst1

  • 11 Department of Otolaryngology-Head and Neck Surgery, Unfallkranken-haus Berlin, Berlin, Germany.

Otolaryngology--Head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery
|December 28, 2016
PubMed
Summary
This summary is machine-generated.

Larger cochlear implant electrode volumes significantly increase intracochlear pressure during insertion. This finding highlights electrode design as a critical factor in preserving residual hearing in cochlear implant surgery.

Keywords:
CI electrode volumehearing preservationintracochlear fluid pressure

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Area of Science:

  • Otolaryngology
  • Biomedical Engineering
  • Neurosurgery

Background:

  • Preserving residual hearing is crucial in cochlear implant surgery.
  • Electrode design and atraumatic insertion are key research areas.
  • Intracochlear pressure changes are influenced by insertion parameters.

Purpose of the Study:

  • To investigate intracochlear pressure variations caused by different cochlear implant electrode designs.
  • To analyze pressure changes in an artificial cochlear model under controlled conditions.

Main Methods:

  • A prospective controlled study using an artificial cochlear model with an apical pressure sensor.
  • Insertion of straight and perimodiolar electrode arrays at consistent speeds and times.
  • Measurement of intracochlear fluid pressure changes.

Main Results:

  • Perimodiolar high-volume electrodes induced significantly greater intracochlear pressure changes than straight electrodes.
  • Perimodiolar electrodes resulted in higher pressure peaks (1.12 vs 0.86 mm Hg) and amplitudes (0.38 vs 0.09 mm Hg).
  • Statistical significance was observed for both pressure peaks (P = .006) and amplitudes (P < .001).

Conclusions:

  • Electrode volume significantly impacts intracochlear pressure during cochlear implantation.
  • Electrode design is a critical factor in preserving residual hearing.
  • Objective data from artificial models can inform surgical techniques and device development.