Motion sickness with combined fore-and-aft and pitch oscillation: effect of phase and the visual scene
Motion sickness with combined fore-and-aft and pitch oscillation: effect of phase and the visual scene
Background: the view ahead influences the motion sickness of car passengers but has been found to have little influence on the sickness caused by low frequency fore-and-aft oscillation. Acceleration and deceleration of vehicles is accompanied by pitch motions that may influence sickness.
Hypotheses: it was hypothesized that: 1) a visual scene would influence sickness caused by combined fore-and-aft and pitch oscillation; and 2) sickness would be dependent on the phase between the fore-and-aft oscillation and the pitch oscillation.
Method: while viewing one of three visual scenes (internal view, blindfold, or external view), 6 groups of 20 subjects were exposed for 30 min to 1 of 2 motions (in-phase or out-of-phase combinations of 0.1 Hz fore-and-aft and pitch oscillation). The 0.1-Hz fore-and-aft oscillation at ± 1.26 ms-2 rms (displacement of ± 3.18 m) was combined with ± 3.69° pitch oscillation either in phase (so the pitch increased acceleration in the plane of the seat to ± 1.89 ms-2) or out of phase (to reduce acceleration to ± 0.63 ms-2).
Results: with both types of motion (in-phase and out-of-phase oscillation) there was significantly less sickness with an external view than with an internal view or a blindfold. There was evidence of an interaction between the effects of viewing condition and the effect of the phase between the fore-and-aft and the pitch oscillation consistent with blindfolded subjects experiencing less sickness when they experienced greater forces.
Conclusions: motion sickness caused by combined fore-and-aft and pitch oscillation depends on both the visual scene and the phase between the fore-and-aft and pitch motions. The minimization of sickness arising from such motions should involve the optimization of both the visual environment and the phase.
motion sickness, oscillation, fore-and-aft, pitch, visual scene
946-954
Butler, Colleen A.
87dbc490-bfb4-41a7-bf8e-a191450123e1
Griffin, Michael J.
24112494-9774-40cb-91b7-5b4afe3c41b8
November 2009
Butler, Colleen A.
87dbc490-bfb4-41a7-bf8e-a191450123e1
Griffin, Michael J.
24112494-9774-40cb-91b7-5b4afe3c41b8
Butler, Colleen A. and Griffin, Michael J.
(2009)
Motion sickness with combined fore-and-aft and pitch oscillation: effect of phase and the visual scene.
Aviation, Space and Environmental Medicine, 80 (11), .
(doi:10.3357/ASEM.2490.2009).
(PMID:19911518)
Abstract
Background: the view ahead influences the motion sickness of car passengers but has been found to have little influence on the sickness caused by low frequency fore-and-aft oscillation. Acceleration and deceleration of vehicles is accompanied by pitch motions that may influence sickness.
Hypotheses: it was hypothesized that: 1) a visual scene would influence sickness caused by combined fore-and-aft and pitch oscillation; and 2) sickness would be dependent on the phase between the fore-and-aft oscillation and the pitch oscillation.
Method: while viewing one of three visual scenes (internal view, blindfold, or external view), 6 groups of 20 subjects were exposed for 30 min to 1 of 2 motions (in-phase or out-of-phase combinations of 0.1 Hz fore-and-aft and pitch oscillation). The 0.1-Hz fore-and-aft oscillation at ± 1.26 ms-2 rms (displacement of ± 3.18 m) was combined with ± 3.69° pitch oscillation either in phase (so the pitch increased acceleration in the plane of the seat to ± 1.89 ms-2) or out of phase (to reduce acceleration to ± 0.63 ms-2).
Results: with both types of motion (in-phase and out-of-phase oscillation) there was significantly less sickness with an external view than with an internal view or a blindfold. There was evidence of an interaction between the effects of viewing condition and the effect of the phase between the fore-and-aft and the pitch oscillation consistent with blindfolded subjects experiencing less sickness when they experienced greater forces.
Conclusions: motion sickness caused by combined fore-and-aft and pitch oscillation depends on both the visual scene and the phase between the fore-and-aft and pitch motions. The minimization of sickness arising from such motions should involve the optimization of both the visual environment and the phase.
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Published date: November 2009
Keywords:
motion sickness, oscillation, fore-and-aft, pitch, visual scene
Organisations:
Human Sciences Group
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Local EPrints ID: 152437
URI: http://eprints.soton.ac.uk/id/eprint/152437
ISSN: 0095-6562
PURE UUID: a921decb-0096-491b-b7be-4111b82c9e76
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Date deposited: 14 May 2010 11:13
Last modified: 14 Mar 2024 01:23
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Author:
Colleen A. Butler
Author:
Michael J. Griffin
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