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Vestibular testing abnormalities in individuals with motion sickness.

Michael E Hoffer1, Kim Gottshall, Richard D Kopke

  • 1Department of Defense, Spatial Orientation Center, Department of Otolaryngology, Naval Medical Center San Diego, San Diego, CA 92134-2200, USA. mehoffer@nmcsd.med.navy.mil

Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [And] European Academy of Otology and Neurotology
|July 10, 2003
PubMed
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Individuals with motion sickness often show abnormal vestibular test results, specifically in their vestibulo-spinal reflex and time constant. These findings, detected via land-based tests, may help understand and treat motion sickness.

Area of Science:

  • Neuroscience
  • Human Physiology

Background:

  • Motion sickness research is challenging due to lack of animal models and symptom specificity to motion environments.
  • Laboratory-based tests are valuable for identifying individuals with motion sickness and characterizing the disorder.

Purpose of the Study:

  • To compare vestibular testing results between individuals experiencing motion sickness and a control group.
  • To identify potential biomarkers for motion sickness using standard vestibular assessments.

Main Methods:

  • Twenty military personnel with diagnosed motion sickness underwent a battery of vestibular tests.
  • Tests included sinusoidal rotational chair testing (vestibulo-ocular reflex), step-velocity testing (vestibular time constants), and posturography (vestibulo-spinal reflex).
  • Results were compared against age- and sex-matched healthy controls.

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Main Results:

  • Individuals with motion sickness exhibited abnormal vestibulo-spinal reflex function in 70% of cases, compared to none in the control group.
  • Abnormalities in the vestibular time constant were found in 60% of those with motion sickness, versus 5% in controls.
  • These vestibular test abnormalities were detectable using standard land-based assessments.

Conclusions:

  • A significant proportion of individuals with motion sickness display detectable abnormalities in their vestibular time constant or vestibulo-spinal reflex.
  • Standard vestibular tests can identify these physiological differences.
  • These findings may contribute to understanding the underlying causes of motion sickness and developing objective measures for treatment efficacy.