Comparison of an EMG-based and a stress-based method to predict shoulder muscle forces.

Détails

ID Serval
serval:BIB_EFB0ED27797D
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Comparison of an EMG-based and a stress-based method to predict shoulder muscle forces.
Périodique
Computer Methods in Biomechanics and Biomedical Engineering
Auteur(s)
Engelhardt C., Malfroy Camine V., Ingram D., Müllhaupt P., Farron A., Pioletti D., Terrier A.
ISSN
1476-8259 (Electronic)
ISSN-L
1025-5842
Statut éditorial
Publié
Date de publication
2015
Peer-reviewed
Oui
Volume
18
Numéro
12
Pages
1272-1279
Langue
anglais
Notes
Publication types: Journal Article Publication Status: ppublish
Résumé
The estimation of muscle forces in musculoskeletal shoulder models is still controversial. Two different methods are widely used to solve the indeterminacy of the system: electromyography (EMG)-based methods and stress-based methods. The goal of this work was to evaluate the influence of these two methods on the prediction of muscle forces, glenohumeral load and joint stability after total shoulder arthroplasty. An EMG-based and a stress-based method were implemented into the same musculoskeletal shoulder model. The model replicated the glenohumeral joint after total shoulder arthroplasty. It contained the scapula, the humerus, the joint prosthesis, the rotator cuff muscles supraspinatus, subscapularis and infraspinatus and the middle, anterior and posterior deltoid muscles. A movement of abduction was simulated in the plane of the scapula. The EMG-based method replicated muscular activity of experimentally measured EMG. The stress-based method minimised a cost function based on muscle stresses. We compared muscle forces, joint reaction force, articular contact pressure and translation of the humeral head. The stress-based method predicted a lower force of the rotator cuff muscles. This was partly counter-balanced by a higher force of the middle part of the deltoid muscle. As a consequence, the stress-based method predicted a lower joint load (16% reduced) and a higher superior-inferior translation of the humeral head (increased by 1.2 mm). The EMG-based method has the advantage of replicating the observed cocontraction of stabilising muscles of the rotator cuff. This method is, however, limited to available EMG measurements. The stress-based method has thus an advantage of flexibility, but may overestimate glenohumeral subluxation.
Pubmed
Web of science
Création de la notice
17/01/2015 12:01
Dernière modification de la notice
03/03/2018 22:35
Données d'usage