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dc.contributor.authorKainz, Hans
dc.contributor.authorCarty, Christopher P
dc.contributor.authorMaine, Sheanna
dc.contributor.authorWalsh, Henry PJ
dc.contributor.authorLloyd, David G
dc.contributor.authorModenese, Luca
dc.date.accessioned2017-09-21T06:05:09Z
dc.date.available2017-09-21T06:05:09Z
dc.date.issued2017
dc.identifier.issn0966-6362
dc.identifier.doi10.1016/j.gaitpost.2017.06.002
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.
dc.description.peerreviewedYes
dc.languageEnglish
dc.publisherElsevier
dc.relation.ispartofpagefrom154
dc.relation.ispartofpageto160
dc.relation.ispartofjournalGait & Posture
dc.relation.ispartofvolume57
dc.subject.fieldofresearchHuman Movement and Sports Science not elsewhere classified
dc.subject.fieldofresearchClinical Sciences
dc.subject.fieldofresearchHuman Movement and Sports Sciences
dc.subject.fieldofresearchMechanical Engineering
dc.subject.fieldofresearchcode110699
dc.subject.fieldofresearchcode1103
dc.subject.fieldofresearchcode1106
dc.subject.fieldofresearchcode0913
dc.titleEffects of hip joint centre mislocation on gait kinematics of children with cerebral palsy calculated using patient-specific direct and inverse kinematic models
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dcterms.licensehttp://creativecommons.org/licenses/by/4.0/
dc.description.versionPublished
gro.facultyGriffith Health, School of Allied Health Sciences
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.
gro.hasfulltextFull Text
gro.griffith.authorCarty, Chris P.
gro.griffith.authorLloyd, David
gro.griffith.authorModenese, Luca
gro.griffith.authorKainz, Hans


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