Type de document
Études primaires
Année de publication
2016
Langue
Anglais
Titre de la revue
Biomechanics and Modeling Mechanobiology
Première page
1699
Dernière page
1712
Résumé
Development of a subject-specific computational musculoskeletal trunk model (accounting for age, sex, body weight and body height), estimation of muscle forces and internal loads as well as subsequent validation by comparison with measured intradiscal pressure in various lifting tasks are novel, important and challenging. The objective of the present study is twofold. First, it aims to update and personalize the passive and active structures in an existing musculoskeletal kinematics-driven finite element model. The scaling scheme used an existing imaging database and biomechanical principles to adjust muscle geometries/cross-sectional-areas and passive joint geometry/properties in accordance with subjects’ sex, age, body weight and body height. Second, using predictions of a detailed passive finite element model of the ligamentous lumbar spine, a novel nonlinear regression equation was proposed that relates the intradiscal pressure (IDP) at the L4–L5 disc to its compression force and intersegmental flexion rotation. Predicted IDPs and muscle activities of the personalized models under various tasks are found in good-to-excellent agreement with reported measurements. Results indicate the importance of personal parameters when computing muscle forces and spinal loads especially at larger trunk flexion angles as minor changes in individual parameters yielded up to 30 % differences in spinal forces. For more accurate subject-specific estimation of spinal loads and muscle activities, such a comprehensive trunk model should be used that accounts for subject’s personalized features on active musculature and passive spinal structure.
Mots-clés
Soulèvement des charges, Manual lifting, Poids maximal des charges à porter, Maximum acceptable weight of lift, Colonne vertébrale, Spinal column, Mécanique humaine, Body mechanics, Lésion du tronc, Trunk injury, Affection dorsale, Back disorder, Maux de dos, Backache
Numéro de projet IRSST
2014-0009
Citation recommandée
Ghezelbash, F., Shirazi-Adl, A., Arjmand, N., El Ouaaid, Z. et Plamondon, A. (2016). Subject-specific biomechanics of trunk: Musculoskeletal scaling, internal loads and intradiscal pressure estimation. Biomechanics and Modeling in Mechanobiology, 15(6), 1699-1712. https://doi.org/10.1007/s10237-016-0792-3
Included in
Biomechanics Commons, Ergonomics Commons, Occupational Health and Industrial Hygiene Commons