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dc.creatorDale, ML
dc.creatorHorak, FB
dc.creatorWright, WG
dc.creatorSchoneburg, BM
dc.creatorNutt, JG
dc.creatorMancini, M
dc.date.accessioned2021-01-25T14:31:13Z
dc.date.available2021-01-25T14:31:13Z
dc.date.issued2017-03-01
dc.identifier.issn1932-6203
dc.identifier.issn1932-6203
dc.identifier.doihttp://dx.doi.org/10.34944/dspace/4923
dc.identifier.other28267762 (pubmed)
dc.identifier.urihttp://hdl.handle.net/20.500.12613/4941
dc.description.abstract© 2017 Dale et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Introduction Progressive supranuclear palsy (PSP) is characterized by early postural instability and backward falls. The mechanisms underlying backward postural instability in PSP are not understood. The aim of this study was to test the hypothesis that postural instability in PSP is a result of dysfunction in the perception of postural verticality. Methods We gathered posturography data on 12 subjects with PSP to compare with 12 subjects with idiopathic Parkinson's Disease (PD) and 12 healthy subjects. Objective tests of postural impairment included: dynamic sensory perception tests of gravity and of surface oscillations, postural responses to surface perturbations, the sensory organization test of postural sway under altered sensory conditions and limits of stability in stance. Results Perception of toes up (but not toes down) surface tilt was reduced in subjects with PSP compared to both control subjects (p≤0.001 standing, p≤0.007 seated) and subjects with PD (p≤0.03 standing, p≤0.04 seated). Subjects with PSP, PD and normal controls accurately perceived the direction of gravity when standing on a tilting surface. Unlike PD and control subjects, subjects with PSP exerted less postural corrective torque in response to toes up surface tilts. Discussion Difficulty perceiving backward tilt of the surface or body may account for backward falls and postural impairments in patients with PSP. These observations suggest that abnormal central integration of sensory inputs for perception of body and surface orientation contributes to the pathophysiology of postural instability in PSP.
dc.format.extente0173351-e0173351
dc.language.isoen
dc.relation.haspartPLoS ONE
dc.relation.isreferencedbyPublic Library of Science (PLoS)
dc.rightsCC BY
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectAged
dc.subjectAged, 80 and over
dc.subjectCase-Control Studies
dc.subjectCross-Sectional Studies
dc.subjectFemale
dc.subjectGravitation
dc.subjectHead-Down Tilt
dc.subjectHumans
dc.subjectMale
dc.subjectMiddle Aged
dc.subjectOrientation
dc.subjectParkinson Disease
dc.subjectSpace Perception
dc.subjectSupranuclear Palsy, Progressive
dc.titleImpaired perception of surface tilt in progressive supranuclear palsy
dc.typeArticle
dc.type.genreJournal Article
dc.relation.doi10.1371/journal.pone.0173351
dc.ada.noteFor Americans with Disabilities Act (ADA) accommodation, including help with reading this content, please contact scholarshare@temple.edu
dc.date.updated2021-01-25T14:31:09Z
refterms.dateFOA2021-01-25T14:31:13Z


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