An algorithm for estimation of shoulder muscle forces for clinical use

Favre, Philippe; Sheikh, Ralph; Fucentese, Sandro F.; Jacob, H. A. C.

doi:10.1016/j.clinbiomech.2005.04.007

Cited by 69 publications

(106 citation statements)

References 24 publications

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“…In the literature, the indeterminate problem has been solved by four different methods: by avoiding it altogether by using only one muscle (Inman et al, 1944), by using EMG measurements (Poppen and Walker, 1978), by using optimization methods (van der Helm, 1994;Karlsson and Peterson, 1992;Favre et al, 2005), and by using constant force ratios (Wuelker et al, 1995;Apreleva et al, 2000) or other predetermined muscle forces (Soslowsky et al, 1992b). As for the above cadaver models, the constant ratios method used in the present paper seems quite reasonable for abduction in the scapular plane, since all abductor muscles are nearly symmetrical in this plane and produce nearly proportional EMG signals (Ringelberg, 1985).…”

Section: Discussionmentioning

confidence: 99%

Effect of supraspinatus deficiency on humerus translation and glenohumeral contact force during abduction

Terrier

Reist

Vogel

et al. 2007

Clinical Biomechanics

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Background. Supraspinatus deficiency is the most frequent and important problem associated to rotator cuff pathologies. It reduces shoulder stability and can lead to osteoarthritis. The goal of this study was to develop a numerical model of the shoulder to analyse the biomechanical consequences of this pathology.Methods. A 3D finite element model of the shoulder was developed from a normal cadaver specimen. It included the scapula, the humerus and the major abduction muscles. Instead of the usual ball-socket assumption, which prevents the natural translation of the humerus, shoulder stability was actively achieved by muscles. A feedback algorithm was developed to synchronise muscle forces during abduction. The numerical algorithm was validated against an algebraic model, and the calculated muscle moment arms were compared to the literature. Two cases were considered: a normal shoulder and the same one without supraspinatus.Findings. For the normal shoulder, the model predicted the initial upward migration of the humeral head. The maximal humerus translation occurred at 30°of abduction and was 0.75 mm above its ideal centered position. Without supraspinatus, it was 1.6 times higher and the contact point in the glenoid fossa was more eccentric. For the normal shoulder, the maximal glenohumeral force was 81% of the body weight, at 82°of abduction. Without supraspinatus, it increased by 8%, while the increase of muscle forces was 30%.Interpretation. Supraspinatus deficiency increased the upward migration of the humerus, the eccentric loading, and the joint and muscle forces, which may cause a limitation of active abduction and degenerative glenohumeral changes (osteoarthritis and the rotator cuff tear).

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Section: Discussionmentioning

confidence: 99%

Effect of supraspinatus deficiency on humerus translation and glenohumeral contact force during abduction

Terrier

Reist

Vogel

et al. 2007

Clinical Biomechanics

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“…It should be noted that the Dickerson model is an implementation of the model developed by Hogfors and co-workers (Hogfors et al, 1987(Hogfors et al, ,1991(Hogfors et al, ,1995. For the other included models, moment arm data were extracted from published or dissertation data from the Favre model (Favre et al, 2005), Garner model (Garner and Pandy, 2001), and Newcastle model (Charlton, 2003); the availability of these models is not known.…”

Section: Methodsmentioning

confidence: 99%

Comparison of model-predicted and measured moment arms for the rotator cuff muscles

Gatti¹,

Dickerson²,

Chadwick³

et al. 2007

Clinical Biomechanics

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“…The magnitude of the load applied to the joint was not representative of the forces acting in vivo. 3,9,21,33,39 Because the in vivo forces causing dislocation of the reverse prosthesis remain unknown 17 this force was selected to reproduce the standards implemented in previous studies, 18,26,31,38 and was chosen low enough to avoid deformation of the polyethylene cup. 1,11 Furthermore, it has been shown that there exist a linear relationship between the compressive and the dislocation force, 17 indicating that the stability ratio is independent of the compressive load in the reverse setting.…”

Section: Discussionmentioning

confidence: 99%

The effect of component positioning on intrinsic stability of the reverse shoulder arthroplasty

Favre

Sussmann

Gerber

2010

Journal of Shoulder and Elbow Surgery

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139

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An algorithm for estimation of shoulder muscle forces for clinical use

Cited by 69 publications

References 24 publications

Effect of supraspinatus deficiency on humerus translation and glenohumeral contact force during abduction

Effect of supraspinatus deficiency on humerus translation and glenohumeral contact force during abduction

Comparison of model-predicted and measured moment arms for the rotator cuff muscles

The effect of component positioning on intrinsic stability of the reverse shoulder arthroplasty

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