Muscle co-contraction in an upper limb musculoskeletal model: EMG-assisted vs. standard load-sharing.

Details

Serval ID
serval:BIB_0E219CBD388A
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Muscle co-contraction in an upper limb musculoskeletal model: EMG-assisted vs. standard load-sharing.
Journal
Computer methods in biomechanics and biomedical engineering
Author(s)
Sarshari E., Mancuso M., Terrier A., Farron A., Mullhaupt P., Pioletti D.
ISSN
1476-8259 (Electronic)
ISSN-L
1025-5842
Publication state
Published
Issued date
02/2021
Peer-reviewed
Oui
Volume
24
Number
2
Pages
137-150
Language
english
Notes
Publication types: Comparative Study ; Journal Article
Publication Status: ppublish
Abstract
Estimation of muscle forces in over-actuated musculoskeletal models involves optimal distributions of net joint moments among muscles by a standard load-sharing scheme (SLS). Given that co-contractions of antagonistic muscles are counterproductive in the net joints moments, SLS might underestimate the co-contractions. Muscle co-contractions play crucial roles in stability of the glenohumeral (GH) joint. The aim of this study was to improve estimations of muscle co-contractions by incorporating electromyography (EMG) data into an upper limb musculoskeletal model. To this end, the model SLS was modified to develop an EMG-assisted load-sharing scheme (EALS). EMG of fifteen muscles were measured during arm flexion and abduction on a healthy subject and fed into the model. EALS was compared to SLS in terms of muscle forces, GH joint reaction force, and a stability ratio defined to quantify the GH joint stability. The results confirmed that EALS estimated higher muscle co-contractions compared to the SLS (e.g., above 50 N higher forces for both triceps long and biceps long during arm flexion).
Keywords
Adult, Biomechanical Phenomena, Electromyography, Humans, Male, Models, Biological, Muscle Contraction/physiology, Muscle, Skeletal/physiology, Range of Motion, Articular, Shoulder Joint/physiology, Upper Extremity/physiology, Weight-Bearing, Hill-type models, Muscle over-actuations, antagonistic muscle co-contractions, inverse dynamics, muscle force estimations
Pubmed
Web of science
Create date
27/10/2020 8:28
Last modification date
16/06/2021 5:36
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