Comparison of functional methods for estimating joint positions of human limb
(2011) Multibody Dynamics 2011 - ECCOMAS Thematic Conference — Location: Brussels (B) (4.July.2011)
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- Authors
- Abstract
- Accurate knowledge of the center of rotation (CoR) of anatomical joints is required for many research and application fields of biomechanics. However the location of the CoR can be difficult to estimate in vivo. Several methods have been developed over the last thirty years, using 3D motion capture devices. Two main approaches are commonly used to localize the CoR of upper and lower limb joints: predictive methods and functional methods. Functional methods, which can be divided into spherefit methods and coordinate transformation (CT) methods, are reported to show better precision and repeatability than predictive approaches. Many studies focused on the comparison between several functional methods for the estimation of the shoulder or hip joint but, to our knowledge, none of them compared functional methods for estimating joint positions and segmental body lengths of a whole human limb. This paper aims at comparing four functional methods (two spherefit and two CT) for locating shoulder, elbow and wrist joint centers according to the movement characteristics. Various simulations were performed in order to analyze the sensitivity of these methods to the noise level, type of movements, dataset size and computational cost. Experimental measurements were also performed. Five subjects repeated 10 cycles of three different movements (circumduction, flexion-extension and adduction-abduction). On this experimental data, analyses focused on precision and repeatability of 3D localization of the upper limb joint centers. Our study shows that spherefit methods are faster than CT methods. However CT methods seems to be less sensitive to both noise level and dataset size, and their repeatability is more reliable.
- Affiliations
Université Pierre et Marie Curie - CNRS Institut des Systèmes Intelligents et de Robotique
Citations
Bru, B., Herman, B., & Pasqui, V. (2011). Comparison of functional methods for estimating joint positions of human limb. Proceedings of the ECCOMAS Thematic Conference Multibody Dynamics 2011, 17 pages. https://hdl.handle.net/2078.5/221711