Document Detail


The effect of tilted stripes in an optokinetic drum on gastric myoelectric activity and subjective reports of motion sickness.
MedLine Citation:
PMID:  8929199     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: The effects of tilted and vertical optokinetic drum stripes on self-reports of motion sickness and electrogastrograms (EGG's) were measured to investigate possible differences in the effects of stripe orientation. The EGG is a non-invasive measure of gastric myoelectric activity. The normal frequency is 3 cpm, and dysrhythmic 4-9 cpm activity, gastric tachyarrhythmia, has been found to be associated with motion sickness symptoms, particularly nausea. It is theorized that these symptoms are related to a sensory mismatch between the visual and vestibular systems elicited by the drum's rotation. HYPOTHESIS: We hypothesized that tilted stripes would elicit more symptoms than vertical stripes due to an additional sensory mismatch between the visual and vestibular verticals. METHODS: We divided 45 subjects into 2 stripe orientation groups: Vertical, and Tilted 15 degrees in the direction of drum movement. After the subject sat inside the stationary drum for a 6-min baseline, the drum was rotated (10 rpm) for a maximum of 16 min, followed by a 6-min recovery period. Throughout the experiment we measured the subjects' EGG's and subjective symptoms of motion sickness (SSMS). RESULTS: During rotation and recovery, gastric tachyarrhythmic activity was higher for subjects in the Tilted condition; the difference between stripe conditions was significant during rotation (p < 0.05). There were, however, no differences between SSMS scores. CONCLUSIONS: Off-vertical stripes increase the dysrhythmic activity of the stomach that often precedes or accompanies nausea and other symptoms of motion sickness.
Authors:
J T Andre; E R Muth; R M Stern; H W Leibowitz
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Publication Detail:
Type:  Clinical Trial; Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  Aviation, space, and environmental medicine     Volume:  67     ISSN:  0095-6562     ISO Abbreviation:  Aviat Space Environ Med     Publication Date:  1996 Jan 
Date Detail:
Created Date:  1996-11-08     Completed Date:  1996-11-08     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  7501714     Medline TA:  Aviat Space Environ Med     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  30-3     Citation Subset:  IM; S    
Affiliation:
Department of Psychology, Pennsylvania State University, University Park, USA.
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MeSH Terms
Descriptor/Qualifier:
Adult
Electromyography
Female
Humans
Male
Motion Perception / physiology*
Motion Sickness / physiopathology*
Perceptual Distortion / physiology*
Rotation / adverse effects
Stomach / physiology*
Time Factors
Visual Fields
Visual Perception / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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