| Motion sickness with combined lateral and roll oscillation: effect of percentage compensation. | |
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MedLine Citation:
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PMID: 20058734 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Both lateral acceleration and roll through the force of gravity produce lateral forces. On a tilting-train the tilt offsets lateral acceleration so as to improve the physical comfort of passengers, but motion sickness is believed to increase as the lateral force is reduced by increased roll (i.e., as the percentage roll compensation is increased). OBJECTIVES: We investigated how motion sickness caused by combined lateral acceleration and roll displacement depended on the percentage compensation. METHOD: There were 8 groups of 20 subjects who were exposed for up to 30 min to various conditions of combined lateral and roll oscillation: 3 groups of 20 subjects experienced 0.2 Hz oscillation with 1 of 3 compensations (0, 50, or 100%) and 5 groups of 20 subjects experienced 0.1 Hz oscillation with 1 of 5 compensations (0, 25, 50, 75, or 100%). With both frequencies of sinusoidal oscillation, the peak Earth-lateral acceleration was 1.26 m x s(-2). Subjects provided ratings of their motion sickness symptoms at 1-min intervals. RESULTS: The percentage compensation had significant effects on motion sickness. With 0.2 Hz oscillation, 50% roll-compensation of lateral oscillation produced less motion sickness than uncompensated lateral oscillation, and less motion sickness than 100% roll-compensated lateral oscillation. With 0.1 Hz oscillation, 25% roll-compensation of lateral oscillation produced significantly less motion sickness than either 75% or 100% roll-compensated lateral oscillation. CONCLUSIONS: Motion sickness caused by combined lateral and roll oscillation is dependent on the percentage compensation and cannot be predicted by models based on only lateral oscillation or only roll oscillation. |
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Authors:
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Barnaby E Donohew; Michael J Griffin |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Aviation, space, and environmental medicine Volume: 81 ISSN: 0095-6562 ISO Abbreviation: Aviat Space Environ Med Publication Date: 2010 Jan |
Date Detail:
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Created Date: 2010-01-11 Completed Date: 2010-12-22 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7501714 Medline TA: Aviat Space Environ Med Country: United States |
Other Details:
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Languages: eng Pagination: 22-9 Citation Subset: IM; S |
Affiliation:
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Institute of Sound and Vibration Research, University of Southampton, Southampton, England. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acceleration
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adverse effects* Adolescent Adult Deceleration / adverse effects Female Gravitation Humans Male Motion Motion Sickness / etiology* Proportional Hazards Models Questionnaires Regression Analysis Statistics, Nonparametric Transportation / classification, methods* Young Adult |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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