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Analytical study of the effects of soft tissue artefacts on functional techniques to define axes of rotation

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Analytical study of the effects of soft tissue artefacts on functional techniques to define axes of rotation

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dc.contributor.author De Rosario Martínez, Helios es_ES
dc.contributor.author Page Del Pozo, Alvaro Felipe es_ES
dc.contributor.author Besa Gonzálvez, Antonio José es_ES
dc.date.accessioned 2018-06-16T04:23:32Z
dc.date.available 2018-06-16T04:23:32Z
dc.date.issued 2017 es_ES
dc.identifier.issn 0021-9290 es_ES
dc.identifier.uri http://hdl.handle.net/10251/104211
dc.description.abstract [EN] The accurate location of the main axes of rotation (AoR) is a crucial step in many applications of human movement analysis. There are different formal methods to determine the direction and position of the AoR, whose performance varies across studies, depending on the pose and the source of errors. Most methods are based on minimizing squared differences between observed and modelled marker positions or rigid motion parameters, implicitly assuming independent and uncorrelated errors, but the largest error usually results from soft tissue artefacts (STA), which do not have such statistical properties and are not effectively cancelled out by such methods. However, with adequate methods it is possible to assume that STA only account for a small fraction of the observed motion and to obtain explicit formulas through differential analysis that relate STA components to the resulting errors in AoR parameters. In this paper such formulas are derived for three different functional calibration techniques (Geometric Fitting, mean Finite Helical Axis, and SARA), to explain why each technique behaves differently from the others, and to propose strategies to compensate for those errors. These techniques were tested with published data from a sit-to-stand activity, where the true axis was defined using bi-planar fluoroscopy. All the methods were able to estimate the direction of the AoR with an error of less than 5 degrees whereas there were errors in the location of the axis of 30-40 mm. Such location errors could be reduced to less than 17 mm by the methods based on equations that use rigid motion parameters (mean Finite Helical Axis, SARA) when the translation component was calculated using the three markers nearest to the axis. (C) 2017 Elsevier Ltd. All rights reserved. es_ES
dc.description.sponsorship This work was funded by the Spanish Government and co-financed by EU FEDER funds (Grant DPI2013-44227-R). We would like to thank Prof. Tung-Wu Lu, Tsung-Yuan Tsai, Mei-Ying Kuo and Horn-Chaung Hsu from National Taiwan University for making the data from their studies available for further research on STA,, and Dr. Tecla Bonci from the Italian University of Sport and Movement 'Foro Italico' for providing the access to benchmark data. es_ES
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof Journal of Biomechanics es_ES
dc.rights Reconocimiento - No comercial - Sin obra derivada (by-nc-nd) es_ES
dc.subject Functional calibration es_ES
dc.subject Axis of rotation es_ES
dc.subject Soft tissue artefacts es_ES
dc.subject Geometric fitting es_ES
dc.subject Finite helical axis es_ES
dc.subject Knee joint es_ES
dc.subject.classification FISICA APLICADA es_ES
dc.subject.classification INGENIERIA MECANICA es_ES
dc.title Analytical study of the effects of soft tissue artefacts on functional techniques to define axes of rotation es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.jbiomech.2017.01.046 es_ES
dc.relation.projectID info:eu-repo/grantAgreement/MINECO//DPI2013-44227-R/ES/METODOLOGIA DE DISEÑO DE SISTEMAS BIOMECATRONICOS. APLICACION AL DESARROLLO DE UN ROBOT PARALELO HIBRIDO PARA DIAGNOSTICO Y REHABILITACION/ es_ES
dc.rights.accessRights Abierto es_ES
dc.date.embargoEndDate 2018-09-06 es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Ingeniería Mecánica y de Materiales - Departament d'Enginyeria Mecànica i de Materials es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Física Aplicada - Departament de Física Aplicada es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto Universitario Mixto de Biomecánica de Valencia - Institut Universitari Mixt de Biomecànica de València es_ES
dc.description.bibliographicCitation De Rosario Martínez, H.; Page Del Pozo, AF.; Besa Gonzálvez, AJ. (2017). Analytical study of the effects of soft tissue artefacts on functional techniques to define axes of rotation. Journal of Biomechanics. 62:60-67. https://doi.org/10.1016/j.jbiomech.2017.01.046 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://doi.org/10.1016/j.jbiomech.2017.01.046 es_ES
dc.description.upvformatpinicio 60 es_ES
dc.description.upvformatpfin 67 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 62 es_ES
dc.identifier.pmid 28242059
dc.relation.pasarela S\351297 es_ES
dc.contributor.funder Ministerio de Economía, Industria y Competitividad es_ES


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