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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.
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Related Experiment Video

Updated: Feb 18, 2026

Author Spotlight: Advancements in Impedance Monitoring for Cochlear Implant Surgery
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Author Spotlight: Advancements in Impedance Monitoring for Cochlear Implant Surgery

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Tinnitus after Simultaneous and Sequential Bilateral Cochlear Implantation.

Geerte G J Ramakers1,2, Véronique J C Kraaijenga1,2, Yvette E Smulders1,2

  • 1Department of Otorhinolaryngology, Head and Neck Surgery, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands.

Frontiers in Surgery
|November 24, 2017
PubMed
Summary
This summary is machine-generated.

Bilateral cochlear implantation can improve tinnitus in some patients, but may also induce new tinnitus. Sequential implantation offered greater long-term tinnitus relief compared to simultaneous implantation.

Keywords:
Tinnitus Handicap InventoryTinnitus Questionnairebilateral cochlear implantationcochlear implantationsequentialsimultaneoustinnitus

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Sound Source Localization Testing in Single-sided Deafness Following Bone Conduction Intervention
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Area of Science:

  • Audiology
  • Otolaryngology
  • Neurosurgery

Background:

  • Bilateral cochlear implantation (CI) is debated for standard care in bilateral deafness.
  • Limited data exists on CI's effect on tinnitus, unlike unilateral CI.

Purpose of the Study:

  • To assess tinnitus outcomes one year after bilateral CI.
  • To compare simultaneous vs. sequential bilateral CI for tinnitus.
  • To evaluate long-term (3-year) tinnitus outcomes.

Main Methods:

  • Secondary analysis of a multicenter randomized controlled trial.
  • 38 postlingually deafened adults received simultaneous or sequential bilateral CIs.
  • Tinnitus severity measured by Tinnitus Handicap Inventory (THI) and Tinnitus Questionnaire (TQ) pre- and post-implantation.

Main Results:

  • 42% of participants had preoperative tinnitus.
  • One year post-bilateral CI, tinnitus scores significantly improved (median THI: -8, TQ: -9).
  • Five participants (simultaneous group) developed new tinnitus; four in the sequential group experienced total tinnitus suppression with the second CI.

Conclusions:

  • Bilateral CI can alleviate pre-existing tinnitus.
  • New tinnitus may be induced by bilateral CI, though often temporary.
  • Sequential bilateral CI may offer superior long-term tinnitus management.