Non-rigid deformation to include subject-specific detail in musculoskeletal models of CP children with proximal femoral deformity and its effect on muscle and contact forces during gait |
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Authors: | Mariska Wesseling Lode Bosmans Christophe Van Dijck Jos Vander Sloten Roel Wirix-Speetjens Ilse Jonkers |
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Affiliation: | 1. Department of Human Movement Sciences, Human Movement Biomechanics, KU Leuven, Heverlee, Belgium;2. Department of Mechanical Engineering, Biomechanics Section, KU Leuven, Heverlee, Belgium;3. Materialise NV, Leuven, Belgium;4. Materialise NV, Leuven, Belgium |
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Abstract: | To account for proximal femoral deformities in children with cerebral palsy (CP), subject-specific musculoskeletal models are needed. Non-rigid deformation (NRD) deforms generic onto personalized bone geometry and thereby transforms the muscle points. The goal of this study was to determine to what extent the models and simulation outcomes in CP patients differ when including subject-specific detail using NRD or Magnetic Resonance Imaging (MRI)-based models. The NRD models slightly overestimated hip contact forces compared to MRI models and differences in muscle point positions and moment arm lengths (MALs) remained, although differences were smaller than for the generic model. |
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Keywords: | Subject-specific MRI non-rigid deformation musculoskeletal modelling |
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