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Motion sickness and equilibrium ataxia.

M Takahashi1, Y Takei, A Saito

  • 1Department of Otolaryngology, Keio University School of Medicine, Tokyo, Japan.

Aviation, Space, and Environmental Medicine
|June 1, 1992
PubMed
Summary
This summary is machine-generated.

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Horizontal visual reversal significantly impairs balance and causes equilibrium ataxia. Vertical reversal, however, does not affect spatial orientation or locomotion, suggesting vision

Area of Science:

  • Neuroscience
  • Human Physiology
  • Vestibular System

Background:

  • Motion sickness and equilibrium ataxia are often linked, but the precise relationship requires further investigation.
  • Understanding how visual input affects balance control is crucial for diagnosing and treating vestibular disorders.

Purpose of the Study:

  • To investigate the relationship between motion sickness and equilibrium ataxia.
  • To determine the impact of horizontal and vertical visual reversal on postural control and spatial orientation.

Main Methods:

  • Graybiel's ataxia test battery was administered to 10 healthy subjects.
  • Tests were conducted before, during, and after walking with goggles that reversed vision horizontally and vertically.
  • Performance was assessed through various open- and closed-eyes tests.

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Main Results:

  • Horizontal visual reversal significantly decreased ataxia test scores during walking and post-walking (both open and closed eyes).
  • Vertical visual reversal caused only a minor, statistically significant change in one closed-eyes test.
  • These findings suggest horizontal visual reversal impairs spatial orientation and induces equilibrium ataxia.

Conclusions:

  • Failure to detect spatial orientation, a potential trigger for motion sickness, leads to equilibrium ataxia by disrupting body balance regulation.
  • Vertically reversed vision does not significantly impair the spatial orientation necessary for maintaining posture or locomotion.
  • The study highlights the critical role of horizontal visual cues in maintaining balance and spatial awareness.