A joint coordinate system proposal for the study of the trapeziometacarpal joint kinematics |
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| Authors: | L Cheze JJ Comtet C Rumelhart M Fayet |
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| Institution: | 1. Université de Lyon , Lyon, F-69003, France;2. Laboratoire de Biomécanique et Mécanique des Chocs – UMR_T 9406 , Université Lyon 1 – INRETS, Batiment Oméga , 43 Boulevard du 11 Novembre 1918, Villeurbanne, F-69622, France;3. Laboratoire de Mécanique des Contacts et des Structures – UMR 5259 , INSA – CNRS, Batiment Jean d'Alembert, 18–20 Rue des Sciences , Villeurbanne, F-69621, France |
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| Abstract: | The International Society of Biomechanics (ISB) has recommended a standardisation for the motion reporting of almost all human joints. This study proposes an adaptation for the trapeziometacarpal joint. The definition of the segment coordinate system of both trapezium and first metacarpal is based on functional anatomy. The definition of the joint coordinate system (JCS) is guided by the two degrees of freedom of the joint, i.e. flexion–extension about a trapezium axis and abduction–adduction about a first metacarpal axis. The rotations obtained using three methods are compared on the same data: the fixed axes sequence proposed by Cooney et al., the mobile axes sequence proposed by the ISB and our alternative mobile axes sequence. The rotation amplitudes show a difference of 9° in flexion–extension, 2° in abduction–adduction and 13° in internal–external rotation. This study emphasizes the importance of adapting the JCS to the functional anatomy of each particular joint. |
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| Keywords: | hand thumb 3D kinematics trapeziometacarpal joint joint coordinate system |
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