Abstract

RIBEIRO, Daniel Cury; ESTIVALET, Marcelo Gregis  and  LOSS, Jefferson Fagundes. Model for muscle force and moment prediction during the shoulder abduction. Rev. Port. Cien. Desp. [online]. 2008, vol.8, n.3, pp.321-329. ISSN 1645-0523.

To identify the muscle force produced by the shoulder muscles is essential to improve the knowledge of injuries mechanisms of the shoulder joint. The aim of the present study was to apply a model to estimate the muscle force and torque, by means of a biomechanical model, during shoulder maximal abduction on the coronal plane. One male, 28 years, 1.78 meters and 85 kg participated in the present study. The optimization model was structured with software Matlab 7.0 ® (MathWorks, Inc.). The model considered as abductor muscles the following: anterior deltoideus, medium deltoideus, posterior deltoideus, supraspinatus, infraspinatus and subscapularis muscles. The comparison between muscle estimated force and moment was performed by the Kruskal-Wallis test, together with the Friedman post hoc test (a=0.05). The medium deltoideus presented the largest estimated torque (16.7 Nm), when compared with the other muscles. The peak torque and force of supraspinatus (6,6Nm e 371N, respectively) was smaller when compared to the three portions of the deltoideus muscle. The results of the model are coherent with those found in the literature and present important information about muscle force production during shoulder abduction.

Keywords : muscle; shoulder; rehabilitation.

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