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Related Concept Videos

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The inner ear assumes dual functionalities of auditory perception and equilibrium maintenance. The vestibule is the organ responsible for balance. This organ contains mechanoreceptors, specifically hair cells, endowed with stereocilia, which aid in deciphering information regarding the position and motion of our heads. Two intrinsic components, the utricle and saccule, help perceive head position, while the semicircular canals track head movement. Neurological messages initiated in the...
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The Vestibular System01:29

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The vestibular system is a set of inner ear structures that provide a sense of balance and spatial orientation. This system is comprised of structures within the labyrinth of the inner ear, including the cochlea and two otolith organs—the utricle and saccule. The labyrinth also contains three semicircular canals—superior, posterior, and horizontal—that are oriented on different planes.
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Related Experiment Video

Updated: Jul 9, 2025

Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process
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Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process

Published on: June 21, 2024

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Vestibular function after simultaneous bilateral cochlear implantation in adults.

Jun Yokoi1, Takeshi Fujita1, Natsumi Uehara1

  • 1Department of Otolaryngology - Head and Neck Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.

Frontiers in Neurology
|November 29, 2023
PubMed
Summary

Simultaneous bilateral cochlear implantation (CI) may cause temporary vestibular dysfunction. However, most patients recover function within a year, indicating the procedure

Keywords:
VEMPbilateral simultaneous cochlear implantationcochlear implantstatic stabilometryvestibular function

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Area of Science:

  • Otolaryngology
  • Neuroscience
  • Audiology

Background:

  • Binaural hearing is crucial for speech intelligibility and localization, especially in noise.
  • Bilateral cochlear implantation (CI) offers significant auditory benefits.
  • Concerns exist regarding potential bilateral vestibular dysfunction after simultaneous CI.

Purpose of the Study:

  • To longitudinally assess vestibular function changes in adult patients undergoing simultaneous bilateral CI.
  • To evaluate the impact of minimally invasive electrodes and surgical techniques on vestibular outcomes.

Main Methods:

  • Retrospective review of 10 patients who underwent simultaneous bilateral CI.
  • Vestibular function tests (caloric reflex, VEMP, stabilometry) and vertigo symptom assessment preoperatively and postoperatively (1-6 months, 1 year).

Main Results:

  • An initial transient decline in vestibular function was observed.
  • No significant long-term decline in caloric reflex, ocular VEMP (oVEMP), or cervical VEMP (cVEMP) was detected.
  • Static stabilometry showed no significant deterioration; all patients were symptom-free at 1 year postoperatively.

Conclusions:

  • Simultaneous bilateral CI using current minimally invasive techniques can lead to temporary vestibular dysfunction.
  • Vestibular function generally recovers over time, suggesting the procedure's potential safety and efficacy.
  • Simultaneous bilateral CI is a viable option, balancing auditory needs with potential risks.