Computational modelling is a powerful tool in biomechanical studies. Open-source software OpenSim provides different musculoskeletal models. However, existing upper body models consider only one limb, which could be a limitation in reproducing two-handed tasks. The purpose of this research was to develop a two upper limbs model that can be customized with subject’s anthropometry and muscles properties. The proposed model was composed of thorax, left and right upper limbs. Each limb presents 3 degrees of freedom (shoulder flexion-extension, elbow flexion-extension and prono-supination), 4 flexor and 3 extensor muscles. A preliminary model assessment was done. A subject was asked to execute isometric tests at three elbow angles, holding different loads, while EMG muscle activation was recorded. Simulated and experimental muscles activation were compared considering the right upper limb. Very good results were obtained without external load, whereas differences were observed when increasing the load; but, overall, model performance remained acceptable.

Upper Limbs Musculoskeletal OpenSim Model: Customization and Assessment / Gastaldi, L.; Panero, E.; Rosso, V.; Pastorelli, S.; Vieira, T.; Botter, A.. - 91:(2021), pp. 162-170. ((Intervento presentato al convegno 3rd International Conference of IFToMM Italy, IFIT 2020 nel 9-10 September 2020 [10.1007/978-3-030-55807-9_19].

Upper Limbs Musculoskeletal OpenSim Model: Customization and Assessment

Gastaldi L.;Panero E.;Rosso V.;Pastorelli S.;Vieira T.;Botter A.
2021

Abstract

Computational modelling is a powerful tool in biomechanical studies. Open-source software OpenSim provides different musculoskeletal models. However, existing upper body models consider only one limb, which could be a limitation in reproducing two-handed tasks. The purpose of this research was to develop a two upper limbs model that can be customized with subject’s anthropometry and muscles properties. The proposed model was composed of thorax, left and right upper limbs. Each limb presents 3 degrees of freedom (shoulder flexion-extension, elbow flexion-extension and prono-supination), 4 flexor and 3 extensor muscles. A preliminary model assessment was done. A subject was asked to execute isometric tests at three elbow angles, holding different loads, while EMG muscle activation was recorded. Simulated and experimental muscles activation were compared considering the right upper limb. Very good results were obtained without external load, whereas differences were observed when increasing the load; but, overall, model performance remained acceptable.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2845875