| Measurement of oscillopsia induced by vestibular Coriolis stimulation. | |
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MedLine Citation:
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PMID: 18626139 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We demonstrate a new method for measuring the time constant of head-movement-contingent oscillopsia (HMCO) produced by vestibular Coriolis stimulation. Subjects briskly rotated their heads around pitch or roll axes whilst seated on a platform rotating at constant velocity. This induced a cross-coupled vestibular Coriolis illusion. Simultaneous with the head movement, a visual display consisting of either a moving field of white dots on a black background or superimposed on a subject-stationary horizon, or a complete virtual room with conventional furnishings appeared. The scene's motion was driven by a simplified computer model of the Coriolis illusion. Subjects either nulled (if visual motion was against the illusory body rotation) or matched (if motion was in the same direction as the illusory motion) the sensation with the exponentially slowing scene motion, by indicating whether its decline was too fast or too slow. The model time constant was approximated using a staircase technique. Time constants comparable to that of the Coriolis vestibular ocular reflex were obtained. Time constants could be significantly reduced by adding subject-stationary visual elements. This technique for measuring oscillopsia might be used to quantify adaptation to artificial gravity environments. In principle more complex models can be used, and applied to other types of oscillopsia such as are experienced by BPPV patients or by astronauts returning to Earth. |
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Authors:
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Jeffrey Sanderson; Charles M Oman; Laurence R Harris |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Journal of vestibular research : equilibrium & orientation Volume: 17 ISSN: 0957-4271 ISO Abbreviation: J Vestib Res Publication Date: 2007 |
Date Detail:
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Created Date: 2008-07-15 Completed Date: 2008-09-05 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9104163 Medline TA: J Vestib Res Country: Netherlands |
Other Details:
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Languages: eng Pagination: 289-99 Citation Subset: IM; S |
Affiliation:
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Department of Psychology, York University, Toronto, ONT M3J 1P3, Canada. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adaptation, Physiological Adult Coriolis Force* Female Head Movements / physiology* Humans Male Motion Perception / physiology* Rotation Space Motion Sickness / etiology Vestibule, Labyrinth / physiology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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