Title:	Evaluation of musculoskeletal modelling parameters of the shoulder complex during humeral abduction above 90°
Authors:	Aurbach, Maximilian Špička, Jan Süß, Franz Dendorfer, Sebastian
Citation:	AURBACH, M., ŠPIČKA, J., SÜß, F., DENDORFER, S. Evaluation of musculoskeletal modelling parameters of the shoulder complex during humeral abduction above 90°. Journal of biomechanics, 2020, roč. 106, č. 9 June 2020. ISSN 0021-9290.
Issue Date:	2020
Publisher:	Elsevier
Document type:	článek article
URI:	2-s2.0-85086356438 http://hdl.handle.net/11025/41905
ISSN:	0021-9290
Keywords in different language:	Shoulder joint;Musculoskeletal modelling;EMG;Glenohumeral joint reaction force;Muscle model
Abstract in different language:	Based on electromyographic data and force measurements within the shoulder joint, there is an indication that muscle and resulting joint reaction forces keep increasing over an abduction angle of 90. In inverse dynamics models, no single parameter could be attributed to simulate this force behaviour accordingly. The aim of this work is to implement kinematic, kinetic and muscle model modifications to an existing model of the shoulder (AnyBodyTM) and assess their single and combined effects during abduction up to 140 humeral elevation. The kinematics and the EMG activity of 10 test subjects were measured during humeral abduction. Six modifications were implemented in the model: alternative wrapping of the virtual deltoid muscle elements, utilization of a three element Hill model, strength scaling, motion capture driven clavicle elevation/protraction, translation of the GH joint in dependency of the acting forces and an alteration of the scapula/clavicle rhythm. From the six modifications, 16 different combinations were considered. Parameter combinations with the Hill model changed the resultant GH joint reaction force and led to an increase in force during abduction of the humerus above 90. Under the premise of muscle activities and forces within the GH joint rising after 90 of humeral abduction, we propose that the Hill type muscle model is a crucial parameter for accurately modelling the shoulder. Furthermore, the outcome of this study indicates that the Hill model induces the co-contraction of the muscles of the shoulder without the need of an additional stability criterion for an inverse dynamics approach.
Rights:	Plný text není přístupný. © Elsevier
Appears in Collections:	Články / Articles OBD

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