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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 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: Dec 17, 2025

Using Unidirectional Rotations to Improve Vestibular System Asymmetry in Patients with Vestibular Dysfunction
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Separating posterior-circulation stroke from vestibular neuritis with quantitative vestibular testing.

Zeljka Calic1, Benjamin Nham2, Andrew P Bradshaw2

  • 1Department of Neurophysiology, Liverpool Hospital, Liverpool, NSW, Australia; South Western Sydney Clinical School, University of New South Wales, Sydney, NSW, Australia; Ingham Institute for Applied Medical Research, Liverpool, NSW, Australia.

Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology
|July 1, 2020
PubMed
Summary

Quantitative vestibular tests effectively differentiate vestibular neuritis from posterior circulation stroke. Video Head-Impulse tests (vHIT) and vestibulo-ocular reflex (VOR) metrics show high accuracy in distinguishing these conditions, aiding in emergency room diagnosis.

Keywords:
Acute vestibular syndromePosterior circulation strokeSaccadesVestibular neuritisVestibulo-ocular reflexVideo head impulse test

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Area of Science:

  • Neurology
  • Otolaryngology
  • Neuroscience

Background:

  • Vestibular neuritis (VN) and posterior circulation stroke (PCS) present with similar acute symptoms, complicating differential diagnosis.
  • Accurate and timely differentiation is crucial for appropriate patient management and preventing adverse outcomes.

Purpose of the Study:

  • To evaluate the efficacy of quantitative vestibular tests in differentiating VN from PCS.
  • To identify specific test parameters that best discriminate between these two conditions.

Main Methods:

  • Video Head-Impulse tests (vHIT) were employed to assess semicircular canal function, measuring vestibulo-ocular reflex (VOR) gain and saccade metrics.
  • Otolith function was evaluated using cervical and ocular-Vestibular-Evoked Myogenic Potentials (c- and oVEMP) and Subjective Visual Horizontal (SVH) tests.

Main Results:

  • vHIT demonstrated significant differences in VOR gain and refixation-saccade prevalence and amplitude between VN and PCS groups.
  • Specific thresholds for VOR gain (≤0.68), refixation-saccade prevalence (≥135%), and cumulative saccade amplitudes (≥5.3°) showed high sensitivity and specificity in separating VN from PCS.
  • Abnormal oVEMP asymmetry ratios offered high specificity (90.9%) but lower sensitivity (50%) for differentiating VN from PCS.

Conclusions:

  • vHIT parameters, including VOR gain and saccade metrics, are highly effective in distinguishing VN from PCS.
  • Combined vHIT measures achieved a sensitivity and specificity of 90.9% for differentiating VN from PCS.
  • These quantitative vestibular tests, particularly vHIT and oVEMP, can aid in the early etiological identification of Acute Vestibular Syndrome in emergency settings.