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An improved kinematic model of the spine for three-dimensional motion analysis in the Vicon system

Mirosława M. Długosz 1, * Daria Panek 1 Paweł Maciejasz 2 Wiesław Chwała 3 Witold Alda 1
* Corresponding author
2 DEMAR - Artificial movement and gait restoration
CRISAM - Inria Sophia Antipolis - Méditerranée , LIRMM - Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier
Abstract : The mechanism of creation and pathomechanics of lateral spinal deformation is still not fully explained. Modern medical imaging techniques give scientists possibility to understand some aspects, but vast majority of those techniques is based on static trials. A motion capture system belongs to techniques which enable visualization of a spine during dynamic trials; however, due to lack of appropriate computational model, it is unsuitable for scoliosis imaging. A few years ago our group has proposed a kinematic model of the spine to be used with Vicon Motion Capture System, which was based on Bézier curves. That model allowed for much more precise investigation of spinal kinematics during dynamic trials as compared with other computational models. However, it did not allowed to restrict only selected movements for particular segments of the spine (e.g. axial rotation for lumbar spine). The aim of the current work is to improve the proposed model in order to be able to restrict selected movements according to the knowledge concerning spinal anatomy and spinal range of motion. The new kinematic model of the spine was written in BodyBuilder for Biomechanics Language. For the purpose of visualization also an accurate graphical representation of each vertebra (polygon mesh) was computed and adapted to be compatible with the kinematic model. Using a new version of the model it is possible to perform precise analysis of movement of all vertebrae during such dynamic activities as e.g. gait and forward or lateral bending, as well as to present the results not only on the charts, but also as a 3D animation of movements of a realistically looking spine. The paper describes the new kinematic model and the process of creating graphical representation of the vertebrae. Also sample results obtained using that model are presented.
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Contributor : Paweł Maciejasz Connect in order to contact the contributor
Submitted on : Tuesday, August 14, 2012 - 3:33:54 PM
Last modification on : Friday, October 22, 2021 - 3:07:33 PM


  • HAL Id : lirmm-00723834, version 1



Mirosława M. Długosz, Daria Panek, Paweł Maciejasz, Wiesław Chwała, Witold Alda. An improved kinematic model of the spine for three-dimensional motion analysis in the Vicon system. IRSSD'2012: 9th Biennial Meeting of the International Research Society of Spinal Deformities, Jul 2012, Poznan, Poland. pp.227-231. ⟨lirmm-00723834⟩



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