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Nauseogenicity of off-vertical axis rotation vs. equivalent visual motion
Mieka M C Bijveld1, Adolfo M Bronstein, John F Golding
1Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands.
Aviation, Space, and Environmental Medicine
|July 16, 2008
Summary
Off-vertical axis rotation (OVAR) causes motion sickness twice as effectively as visual motion. Visual motion also induced headaches, suggesting links to migraine mechanisms.
Area of Science:
- Vestibular system research
- Human sensory perception
- Motion sickness etiology
Background:
- Off-vertical axis rotation (OVAR) is known to induce motion sickness.
- Simulated visual motion equivalent to OVAR is also nauseogenic.
- This study directly compares the nauseogenic potential of OVAR versus visual motion.
Purpose of the Study:
- To compare the nauseogenicity of real off-vertical axis rotation (OVAR) with its visual motion equivalent.
- To investigate the influence of visual input on OVAR-induced nausea.
- To explore potential mechanisms underlying motion sickness and its relation to visual cues.
Main Methods:
- 12 subjects experienced three conditions: OVAR in darkness, OVAR with eyes open, and stationary visual motion (video).
- Conditions were counterbalanced, separated by at least 5 days, and performed at the same time of day.
- Stimulation ceased at moderate nausea, with a 20-minute maximum; motion sickness susceptibility was assessed using the MSSQ.
Main Results:
- Real OVAR (darkness or light) induced nausea significantly faster (7.1-7.7 min) than visual motion (15.7 min).
- Lower motion sickness susceptibility correlated with slower nausea onset during visual motion (r = -0.7, P < 0.05).
- Headaches were reported more frequently during visual motion stimulation.
Conclusions:
- Off-vertical axis rotation (OVAR) is approximately twice as nauseogenic as visual motion.
- Headaches during visual motion suggest shared mechanisms with migraine.
- Individual differences in visual cue utilization may explain varied responses to motion sickness stimuli, potentially related to 'field dependency'.
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