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Related Concept Videos

The Vestibular System01:29

The Vestibular System

43.1K
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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Equilibrium and Balance01:15

Equilibrium and Balance

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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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Three Dimensional Vestibular Ocular Reflex Testing Using a Six Degrees of Freedom Motion Platform
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Three Dimensional Vestibular Ocular Reflex Testing Using a Six Degrees of Freedom Motion Platform

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Restoring the High-Frequency Dynamic Visual Acuity with a Vestibular Implant Prototype in Humans.

Dmitrii Starkov1,2, Nils Guinand3, Florence Lucieer4

  • 1Division of Balance Disorders, Department of Otorhinolaryngology and Head and Neck Surgery, Maastricht University Medical Center, School for Mental Health and Neuroscience, Maastricht, The Netherlands, dmitrii.n.starkov@gmail.com.

Audiology & Neuro-Otology
|October 30, 2019
PubMed
Summary
This summary is machine-generated.

A vestibular implant shows promise for improving high-frequency dynamic visual acuity (DVA). This device significantly enhanced DVA in a patient with bilateral vestibulopathy, suggesting clinical feasibility.

Keywords:
Bilateral vestibulopathyDynamic visual acuityFunctional head impulse testNeural prosthesisVestibular implantVestibular prosthesis

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Using Unidirectional Rotations to Improve Vestibular System Asymmetry in Patients with Vestibular Dysfunction
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Using Unidirectional Rotations to Improve Vestibular System Asymmetry in Patients with Vestibular Dysfunction
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Area of Science:

  • Neuroscience
  • Ophthalmology
  • Biomedical Engineering

Background:

  • Bilateral vestibulopathy impairs balance and vision.
  • High-frequency dynamic visual acuity (DVA) is crucial for daily activities.
  • Vestibular implants offer potential for restoring vestibular function.

Purpose of the Study:

  • To investigate the feasibility of a vestibular implant for restoring high-frequency DVA.
  • To assess the impact of vestibular implant stimulation on DVA using the functional Head Impulse Test (fHIT).

Main Methods:

  • A patient with bilateral vestibulopathy received a modified cochlear implant with vestibular electrodes.
  • Electrical stimulation was applied to the lateral ampullary nerve.
  • High-frequency DVA was tested using fHIT under various stimulation conditions (OFF, baseline, reversed, positive).

Main Results:

  • Vestibular implant stimulation significantly improved high-frequency DVA compared to no stimulation.
  • Significant improvements were noted with baseline (p=0.02) and positive (p<0.001) stimulation.
  • fHIT scores increased from 19-44% (no stimulation) to 75-94% (positive stimulation).

Conclusions:

  • The vestibular implant demonstrated the capability to enhance high-frequency DVA.
  • These functional benefits support the potential clinical utility of vestibular implants.
  • The study highlights the feasibility of vestibular implants for future clinical applications.