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dc.contributor.authorTimmis, Matthew A.*
dc.contributor.authorBuckley, John G.*
dc.date.accessioned2018-05-10T12:03:00Z
dc.date.available2018-05-10T12:03:00Z
dc.date.issued2012-05
dc.identifier.citationTimmis MA and Buckley JG (2012) Obstacle crossing during locomotion: Visual exproprioceptive information is used in an online mode to update foot placement before the obstacle but not swing trajectory over it. Gait and Posture. 36(1): 160-162.en_US
dc.identifier.urihttp://hdl.handle.net/10454/15842
dc.descriptionYesen_US
dc.description.abstractAlthough gaze during adaptive gait involving obstacle crossing is typically directed two or more steps ahead, visual information of the swinging lower-limb and its relative position in the environment (termed visual exproprioception) is available in the lower visual field (lvf). This study determined exactly when lvf exproprioceptive information is utilised to control/update lead-limb swing trajectory during obstacle negotiation. 12 young participants negotiated an obstacle wearing smart-glass goggles which unpredictably occluded the lvf for certain periods during obstacle approach and crossing. Trials were also completed with lvf occluded for the entirety of the trial. When lvf was occluded throughout, footplacement distance and toe-clearance became significantly increased; which is consistent with previous work that likewise used continuous lvf occlusion. Both variables were similarly affected by lvf occlusion from instant of penultimate-step contact, but both were unaffected when lvf was occluded from instant of final-step contact. These findings suggest that lvf (exproprioceptive) input is typically used in an online manner to control/update final foot-placement, and that without such control, uncertainty regarding foot placement causes toe-clearance to be increased. Also that lvf input is not normally exploited in an online manner to update toe-clearance during crossing: which is contrary to what previous research has suggested.en_US
dc.language.isoenen_US
dc.relation.isreferencedbyhttps://doi.org/10.1016/j.gaitpost.2012.02.008en_US
dc.rights© 2012 Elsevier. Full-text reproduced in accordance with the publisher’s self-archiving policy. This article is distributed under the Creative Commons CC-BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/2.0/uk/)
dc.subjectHuman locomotionen_US
dc.subjectVisual exproprioceptionen_US
dc.subjectLower visual fielden_US
dc.subjectVisionen_US
dc.subjectObstacle avoidanceen_US
dc.titleObstacle crossing during locomotion: Visual exproprioceptive information is used in an online mode to update foot placement before the obstacle but not swing trajectory over iten_US
dc.status.refereedYesen_US
dc.date.Accepted2012-02-13
dc.typeArticleen_US
dc.type.versionAccepted manuscripten_US
refterms.dateFOA2018-07-29T01:39:34Z


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