Utilisation d'un modèle biomécanique pour quantifier les stratégies cinétiques d'un syndrome d'abutement de l'épaule

Authors: Doiron, Yan
Advisor: Simoneau, Martin
Abstract: A biomechanical model was used to quantify the kinetic strategy of the shoulder and the elbow joints. Joint torques were estimated to verify the effect of the subacromial impingement syndrome (SIS) during isometric force task by comparing healthy people with injured people. The biomechanical model was tested with 2 groups: people with SIS (n = 10) and a control group (n = 11). The task was to generate, as quickly and as accurately as possible, an isometric force corresponding to 40% of the maximal voluntary contraction (without pain) in the frontal plan to reach a visual target. There were eight target positions (0°, 45°, 90°, 135°, 180°, 225°, 270° and 315°). Each target location required a different combination of elbow and shoulder torques. The biomechanical model and the measurement of the isometric forces allowed us to calculate the kinetic strategy of the shoulder and the elbow. The results showed that regardless of the target location, the group with SIS was able to reach the target but needed more time to reach the target compared to the control group. Concerning the kinetic strategies, the patients, in contrast to healthy participants, needed lower rotational shoulder torque contribution to reach the target located at 0° and 225° and they had a greater abduction/adduction torque contribution when the targets were located at 0°, 135° and 180°. Finally, patients with impingement syndrome had lower elbow flexion/extension torque contribution when the target was located at 315°. Overall, the biomechanical model demonstrated that, for some target positions, the patients used different kinetic strategy than healthy participants to reach the target.
Document Type: Mémoire de maîtrise
Issue Date: 2007
Open Access Date: 13 April 2018
Permalink: http://hdl.handle.net/20.500.11794/19677
Grantor: Université Laval
Collection:Thèses et mémoires

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