Influence of the Musculotendon Dynamics on the Muscle Force-Sharing Problem of the Shoulder—A Fully Inverse Dynamics Approach
| Autor: | Quental Carlos, Folgado Joao, Azevedo Margarida, S B Gonçalves, A C Ambrósio Jorge |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
medicine.diagnostic_test
0206 medical engineering Dynamics (mechanics) Biomedical Engineering Biomechanics Muscle activation 02 engineering and technology Mechanics Electromyography 020601 biomedical engineering Shoulder flexion Inverse dynamics 03 medical and health sciences 0302 clinical medicine medicine.anatomical_structure Physiology (medical) medicine Upper limb 030217 neurology & neurosurgery Muscle force Mathematics |
| Zdroj: | Journal of Biomechanical Engineering. 140 |
| ISSN: | 1528-8951 0148-0731 |
| DOI: | 10.1115/1.4039675 |
| Popis: | Most dynamic simulations are based on inverse dynamics, being the time-dependent physiological nature of the muscle properties rarely considered due to numerical challenges. Since the influence of muscle physiology on the consistency of inverse dynamics simulations remains unclear, the purpose of the present study is to evaluate the computational efficiency and biological validity of four musculotendon models that differ in the simulation of the muscle activation and contraction dynamics. Inverse dynamic analyses are performed using a spatial musculoskeletal model of the upper limb. The muscle force-sharing problem is solved for five repetitions of unloaded and loaded motions of shoulder abduction and shoulder flexion. The performance of the musculotendon models is evaluated by comparing muscle activation predictions with electromyography (EMG) signals, measured synchronously with motion for 11 muscles, and the glenohumeral joint reaction forces estimated numerically with those measured in vivo. The results show similar muscle activations for all muscle models. Overall, high cross-correlations are computed between muscle activations and the EMG signals measured for all movements analyzed, which provides confidence in the results. The glenohumeral joint reaction forces estimated compare well with those measured in vivo, but the influence of the muscle dynamics is found to be negligible. In conclusion, for slow-speed, standard movements of the upper limb, as those studied here, the activation and musculotendon contraction dynamics can be neglected in inverse dynamic analyses without compromising the prediction of muscle and joint reaction forces. |
| Databáze: | OpenAIRE |
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