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dc.contributor.authorKainz, Hans
dc.contributor.authorCarty, Chris
dc.contributor.authorMaine, Sheanna
dc.contributor.authorWalsh, Henry P. J.
dc.contributor.authorLloyd, David
dc.contributor.authorModenese, Luca
dc.date.accessioned2017-09-21T06:05:09Z
dc.date.available2017-09-21T06:05:09Z
dc.date.issued2017
dc.identifier.issn0966-6362en_US
dc.identifier.doi10.1016/j.gaitpost.2017.06.002en_US
dc.identifier.urihttp://hdl.handle.net/10072/346987
dc.description.abstractJoint kinematics can be calculated by Direct Kinematics (DK), which is used in most clinical gait laboratories, or Inverse Kinematics (IK), which is mainly used for musculoskeletal research. In both approaches, joint centre locations are required to compute joint angles. The hip joint centre (HJC) in DK models can be estimated using predictive or functional methods, while in IK models can be obtained by scaling generic models. The aim of the current study was to systematically investigate the impact of HJC location errors on lower limb joint kinematics of a clinical population using DK and IK approaches. Subject-specific kinematic models of eight children with cerebral palsy were built from magnetic resonance images and used as reference models. HJC was then perturbed in 6 mm steps within a 60 mm cubic grid, and kinematic waveforms were calculated for the reference and perturbed models. HJC perturbations affected only hip and knee joint kinematics in a DK framework, but all joint angles were affected when using IK. In the DK model, joint constraints increased the sensitivity of joint range-of-motion to HJC location errors. Mean joint angle offsets larger than 5° were observed for both approaches (DK and IK), which were larger than previously reported for healthy adults. In the absence of medical images to identify the HJC, predictive or functional methods with small errors in anterior-posterior and medial-lateral directions and scaling procedures minimizing HJC location errors in the anterior-posterior direction should be chosen to minimize the impact on joint kinematics.en_US
dc.description.peerreviewedYesen_US
dc.languageEnglishen_US
dc.publisherElsevieren_US
dc.relation.ispartofpagefrom154en_US
dc.relation.ispartofpageto160en_US
dc.relation.ispartofjournalGait & Postureen_US
dc.relation.ispartofvolume57en_US
dc.subject.fieldofresearchHuman Movement and Sports Science not elsewhere classifieden_US
dc.subject.fieldofresearchcode110699en_US
dc.titleEffects of hip joint centre mislocation on gait kinematics of children with cerebral palsy calculated using patient-specific direct and inverse kinematic modelsen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
dcterms.licensehttp://creativecommons.org/licenses/by/4.0/en_US
dc.description.versionPublisheden_US
gro.facultyGriffith Health, School of Allied Health Sciencesen_US
gro.rights.copyright© 2017 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.en_US
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