Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/27002
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dc.contributor.authorApthorp, Deborahen
dc.contributor.authorNagle, Fintanen
dc.contributor.authorPalmisano, Stephenen
dc.date.accessioned2019-05-29T01:27:09Z-
dc.date.available2019-05-29T01:27:09Z-
dc.date.issued2014-12-02-
dc.identifier.citationPLoS One, 9(12), p. 1-22en
dc.identifier.issn1932-6203en
dc.identifier.urihttps://hdl.handle.net/1959.11/27002-
dc.description.abstractVisually-induced illusions of self-motion (vection) can be compelling for some people, but they are subject to large individual variations in strength. Do these variations depend, at least in part, on the extent to which people rely on vision to maintain their postural stability? We investigated by comparing physical posture measures to subjective vection ratings. Using a Bertec balance plate in a brightly-lit room, we measured 13 participants' excursions of the centre of foot pressure (CoP) over a 60-second period with eyes open and with eyes closed during quiet stance. Subsequently, we collected vection strength ratings for large optic flow displays while seated, using both verbal ratings and online throttle measures. We also collected measures of postural sway (changes in anterior-posterior CoP) in response to the same visual motion stimuli while standing on the plate. The magnitude of standing sway in response to expanding optic flow (in comparison to blank fixation periods) was predictive of both verbal and throttle measures for seated vection. In addition, the ratio between eyes-open and eyes-closed CoP excursions during quiet stance (using the area of postural sway) significantly predicted seated vection for both measures. Interestingly, these relationships were weaker for contracting optic flow displays, though these produced both stronger vection and more sway. Next we used a non-linear analysis (recurrence quantification analysis, RQA) of the fluctuations in anterior-posterior position during quiet stance (both with eyes closed and eyes open); this was a much stronger predictor of seated vection for both expanding and contracting stimuli. Given the complex multisensory integration involved in postural control, our study adds to the growing evidence that non-linear measures drawn from complexity theory may provide a more informative measure of postural sway than the conventional linear measures.en
dc.languageenen
dc.publisherPublic Library of Scienceen
dc.relation.ispartofPLoS Oneen
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.titleChaos in Balance: Non-Linear Measures of Postural Control Predict Individual Variations in Visual Illusions of Motionen
dc.typeJournal Articleen
dc.identifier.doi10.1371/journal.pone.0113897en
dcterms.accessRightsUNE Greenen
local.contributor.firstnameDeborahen
local.contributor.firstnameFintanen
local.contributor.firstnameStephenen
local.relation.isfundedbyARCen
local.subject.for2008170112 Sensory Processes, Perception and Performanceen
local.subject.seo2008970106 Expanding Knowledge in the Biological Sciencesen
local.profile.schoolSchool of Psychology and Behavioural Scienceen
local.profile.emaildapthorp@une.edu.auen
local.output.categoryC1en
local.grant.numberDP0772398en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.publisher.placeUnited States of Americaen
local.identifier.runningnumbere113897en
local.format.startpage1en
local.format.endpage22en
local.peerreviewedYesen
local.identifier.volume9en
local.identifier.issue12en
local.title.subtitleNon-Linear Measures of Postural Control Predict Individual Variations in Visual Illusions of Motionen
local.access.fulltextYesen
local.contributor.lastnameApthorpen
local.contributor.lastnameNagleen
local.contributor.lastnamePalmisanoen
dc.identifier.staffune-id:dapthorpen
local.profile.orcid0000-0001-5785-024Xen
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:1959.11/27002en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitleChaos in Balanceen
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.relation.grantdescriptionARC/DP0772398en
local.search.authorApthorp, Deborahen
local.search.authorNagle, Fintanen
local.search.authorPalmisano, Stephenen
Appears in Collections:Journal Article
School of Psychology
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