Author(s) |
Palmisano, Stephen
Apthorp, Deborah
Seno, Takeharu
Stapley, Paul J
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Publication Date |
2014-04
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Abstract |
This study asked whether individual differences in the influence of vision on postural stability could be used to predict the strength of subsequently induced visual illusions of self-motion (vection). In the experiment, we first measured spontaneous postural sway while subjects stood erect for 60 s with their eyes both open and both closed. We then showed our subjects two types of self-motion display: radially expanding optic flow (simulating constant velocity forwards self-motion) and vertically oscillating radially expanding optic flow (simulating constant velocity forwards self-motion combined with vertical head oscillation). As expected, subjects swayed more with their eyes closed (compared to open) and experienced more compelling illusions of self-motion with vertically oscillating (as opposed to smooth) radial flow. The extent to which participants relied on vision for postural stability- measured as the ratio of sway with eyes closed compared to that with eyes open- was found to predict vection strength. However, this was only the case for displays representing smooth self-motion. It seems that for oscillating displays, other factors, such as visual-vestibular interactions, may be more important.
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Citation |
Experimental Brain Research, 232(4), p. 1185-1191
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ISSN |
1432-1106
0014-4819
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Pubmed ID |
24449012
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Link | |
Publisher |
Springer
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Title |
Spontaneous postural sway predicts the strength of smooth vection
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Type of document |
Journal Article
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Entity Type |
Publication
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