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Related Concept Videos

The Vestibular System01:29

The Vestibular System

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.
Equilibrium and Balance01:15

Equilibrium and Balance

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...
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.
Anatomy of the Ear01:16

Anatomy of the Ear

Auditory sensation, commonly called hearing, involves the transformation of sonic waves into neural impulses facilitated by the structures of the auditory organ. The prominent, flesh-like structure on the side of the head, called the auricle, directs sound waves towards the auditory canal. The auricle is often mislabeled as the pinna, a term more aligned with mobile structures like a feline's external ear. The auditory canal penetrates the cranium via the external auditory meatus of the...

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Related Experiment Video

Updated: Jun 30, 2026

Cochlear Implant Surgery and Electrically-evoked Auditory Brainstem Response Recordings in C57BL/6 Mice
09:06

Cochlear Implant Surgery and Electrically-evoked Auditory Brainstem Response Recordings in C57BL/6 Mice

Published on: January 9, 2019

Effect of cochlear implantation on horizontal semicircular canal function.

Eike Krause1, Julia P R Louza, John-Martin Hempel

  • 1Department of Oto-Rhino-Laryngology, Head and Neck Surgery, Ludwig-Maximilians-University Munich, Marchioninistrasse 15, 81377, Munich, Germany. eike.krause@med.uni-muenchen.de

European Archives of Oto-Rhino-Laryngology : Official Journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : Affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery
|September 23, 2008
PubMed
Summary

Cochlear implantation can impair horizontal semicircular canal function, leading to vertigo. However, this functional change doesn't always cause symptoms, suggesting other factors are involved.

Related Experiment Videos

Last Updated: Jun 30, 2026

Cochlear Implant Surgery and Electrically-evoked Auditory Brainstem Response Recordings in C57BL/6 Mice
09:06

Cochlear Implant Surgery and Electrically-evoked Auditory Brainstem Response Recordings in C57BL/6 Mice

Published on: January 9, 2019

Area of Science:

  • Otolaryngology
  • Neuroscience
  • Audiology

Background:

  • Cochlear implantation (CI) is a common treatment for severe to profound hearing loss.
  • Vestibular function, particularly the horizontal semicircular canal (hSCC), may be affected by CI surgery.
  • Understanding the impact of CI on vestibular function is crucial for managing postoperative outcomes.

Purpose of the Study:

  • To evaluate the effect of cochlear implantation on horizontal semicircular canal function.
  • To correlate changes in hSCC function with postoperative vertigo symptoms.
  • To identify risk factors for vestibular impairment after cochlear implantation.

Main Methods:

  • Prospective observational study of 47 adult patients undergoing cochlear implantation.
  • Pre- and postoperative vestibular function tests, including caloric and rotational chair tests.
  • Assessment of postoperative vertigo symptoms via questionnaires and interviews.

Main Results:

  • 45% of patients reported vertigo symptoms post-CI.
  • 32% of patients showed substantially reduced hSCC function after implantation.
  • Caloric irrigation responses significantly worsened postoperatively in CI ears, but without direct correlation to vertigo symptoms.

Conclusions:

  • Cochlear implantation can cause functional damage to the vestibular system, evidenced by worsened caloric responses.
  • The absence of vertigo in all patients with reduced hSCC function suggests a role for compensatory mechanisms.
  • Further research is needed to understand the interplay of sensory, visual, and central factors in CI-related vestibular impairment.