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Updated: Dec 31, 2025

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Bilateral Vestibular Dysfunction.

Sun-Uk Lee1, Hyo-Jung Kim2, Ji-Soo Kim3,4

  • 1Department of Neurology, Korea University Anam Hospital, Seoul, South Korea.

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|January 15, 2020
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Summary
This summary is machine-generated.

Bilateral vestibular dysfunction (BVD) causes dizziness and unsteadiness, with unknown causes in half of cases. Diagnosis requires symptom and vestibular reflex testing, with rehabilitation offering aid.

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Area of Science:

  • Neurology
  • Otolaryngology
  • Vestibular System Science

Background:

  • Bilateral vestibular dysfunction (BVD) is characterized by hypofunction of both vestibular nerves or labyrinths.
  • Patients experience symptoms like dizziness, oscillopsia, and unsteadiness, exacerbated by locomotion, darkness, or uneven surfaces.
  • While causes include ototoxicity and Meniere's disease, up to 50% of BVD cases remain idiopathic.

Purpose of the Study:

  • To define bilateral vestibular dysfunction (BVD).
  • To outline diagnostic criteria and differential diagnoses for BVD.
  • To discuss management strategies for patients with BVD.

Main Methods:

  • Diagnosis relies on patient-reported symptoms and objective documentation of vestibulo-ocular reflex deficits.
  • Key diagnostic tests include head-impulse, bithermal caloric, and rotatory chair assessments.
  • Clinical evaluation must consider potential central nervous system and systemic etiologies.

Main Results:

  • BVD symptoms significantly impact balance and visual stability, particularly during movement and in challenging sensory environments.
  • Diagnostic confirmation necessitates correlating subjective symptoms with objective vestibular function tests.
  • A significant proportion of BVD cases lack a clear underlying cause, highlighting diagnostic challenges.

Conclusions:

  • Accurate diagnosis of BVD requires a combination of symptomatic presentation and objective vestibular testing.
  • Clinicians must maintain a high index of suspicion for associated neurological and systemic conditions.
  • Management involves addressing underlying causes, vestibular rehabilitation, and assistive technologies like vibrotactile feedback or vestibular prostheses.