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Examination of Utricular Response Using oVEMP and Unilateral Centrifugation Rotation Testing.

Christopher K Zalewski1, R Steven Ackley2, Devin L McCaslin3

  • 1Audiology Unit, Otolaryngology Branch, National Institutes of Health (NIH), National Institute on Deafness and Other Communication Disorders (NIDCD), Bethesda, Maryland, USA.

Ear and Hearing
|February 13, 2018
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Summary

Ocular vestibular-evoked myogenic potentials (oVEMP) and unilateral centrifugation (UCF) testing, used for assessing utricular function, showed no significant correlation in healthy adults. These distinct vestibular tests may offer complementary insights into the complex utricle.

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Area of Science:

  • Vestibular Neuroscience
  • Otolaryngology
  • Clinical Neurophysiology

Background:

  • Clinical assessment of utricular function has advanced with ocular vestibular-evoked myogenic potentials (oVEMP) and unilateral centrifugation (UCF) testing.
  • No prior studies have investigated the intrasubject relationships between oVEMP and UCF measures.

Purpose of the Study:

  • To examine the intrasubject correlation between oVEMP and UCF testing in healthy volunteers.
  • To determine if these two distinct methods for assessing utricular function yield related outcomes within the same individuals.

Main Methods:

  • Healthy volunteers (aged 18-62) underwent both oVEMP testing and UCF rotations.
  • A within-subject design compared oVEMP N1-P1 amplitude against UCF outcomes (ocular counterroll, subjective visual vertical, ocular counterroll-gravitational inertial acceleration slope).

Main Results:

  • Correlational analyses revealed no significant relationships between oVEMP amplitude and UCF responses.
  • This suggests that oVEMP and UCF may stimulate different response properties within the utricular system.

Conclusions:

  • The lack of correlation may stem from anatomical/physiological differences in the utricle and distinct stimulus properties of oVEMP and UCF.
  • These findings suggest oVEMP and UCF might be complementary tools for evaluating the complex utricular system and its clinical assessment challenges.