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Effects of direction and curvature on variable error pattern of reaching movements

dc.contributor.authorJaric, S.
dc.contributor.authorTortoza, C.
dc.contributor.authorFatarelli, IFC
dc.contributor.authorAlmeida, G. L.
dc.contributor.institutionMed Res Inst
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:28:01Z
dc.date.available2014-05-20T15:28:01Z
dc.date.issued1999-10-01
dc.description.abstractA number of studies have analyzed various indices of the final position variability in order to provide insight into different levels of neuromotor processing during reaching movements. Yet the possible effects of movement kinematics on variability have often been neglected. The present study was designed to test the effects of movement direction and curvature on the pattern of movement variable errors. Subjects performed series of reaching movements over the same distance and into the same target. However, due either to changes in starting position or to applied obstacles, the movements were performed in different directions or along the trajectories of different curvatures. The pattern of movement variable errors was assessed by means of the principal component analysis applied on the 2-D scatter of movement final positions. The orientation of these ellipses demonstrated changes associated with changes in both movement direction and curvature. However, neither movement direction nor movement curvature affected movement variable errors assessed by area of the ellipses. Therefore it was concluded that the end-point variability depends partly, but not exclusively, on movement kinematics.en
dc.description.affiliationMed Res Inst, YU-11000 Belgrade, Yugoslavia
dc.description.affiliationUniv Estadual Campinas, BR-13081970 Campinas, SP, Brazil
dc.description.affiliationUniv Estadual Paulista, Rio Claro, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Rio Claro, Brazil
dc.format.extent414-423
dc.identifierhttp://www.ncbi.nlm.nih.gov/pubmed/10529504
dc.identifier.citationMotor Control. Champaign: Human Kinetics Publ Inc., v. 3, n. 4, p. 414-423, 1999.
dc.identifier.issn1087-1640
dc.identifier.urihttp://hdl.handle.net/11449/37928
dc.identifier.wosWOS:000084269100006
dc.language.isoeng
dc.publisherHuman Kinetics Publ Inc
dc.relation.ispartofMotor Control
dc.relation.ispartofjcr0.957
dc.relation.ispartofsjr0,357
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectreachingpt
dc.subjectdirectionpt
dc.subjectcurvaturept
dc.subjecthumanpt
dc.titleEffects of direction and curvature on variable error pattern of reaching movementsen
dc.typeArtigo
dcterms.licensehttp://journals.humankinetics.com/submission-guidelines-for-IJSNEM
dcterms.rightsHolderHuman Kinetics Publ Inc
dspace.entity.typePublication

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