Moment arms of the deltoid, infraspinatus and teres minor muscles for movements with high range of motion: A cadaveric study - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Clinical Biomechanics Année : 2022

Moment arms of the deltoid, infraspinatus and teres minor muscles for movements with high range of motion: A cadaveric study

Résumé

Background: Moment arms are an indicator of the role of the muscles in joint actuation. An excursion method is often used to calculate them, even though it provides 1D results. As shoulder movement occurs in three dimensions (combination of flexion, abduction and axial rotation), moment arms should be given in 3D. Our objective was to assess the 3D moment arms of the rotator cuff (infraspinatus and teres minor) and deltoid muscles for movements with high arm elevation. Methods: The 3D moment arms (components in plane of elevation, elevation and axial rotation) were assessed using a geometric method, enabling to calculate the moment arms in 3D, on five fresh post-mortem human shoulders. Movement with high range of motion were performed (including overhead movement). The humerus was elevated until it reaches its maximal posture in different elevation plane (flexion, scaption, abduction and elevation in a plane 30° posterior to frontal plane). Findings: We found that the anterior deltoid was a depressor and contributes to move the elevation plane anteriorly. The median deltoid was a great elevator and the posterior deltoid mostly acted in moving the elevation plane posteriorly. The infraspinatus and teres minor were the greatest external rotator of the shoulder. The position of the glenohumeral joint induces changes in the muscular moment arms. The maximal shoulder elevation was 144° (performed in the scapular plane). Interpretation: The knowledge of 3D moment arms for different arm elevations might help surgeons in planning tendon reconstructive surgery and help validate musculoskeletal models.
Fichier principal
Vignette du fichier
Hoffmann et al. - 2022 - Moment arms of the deltoid, infraspinatus and tere - postprint.pdf (8.09 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04216939 , version 1 (25-09-2023)

Identifiants

Citer

Marion Hoffmann, Mickael Begon, Najoua Assila, Marc-Olivier St-Pierre, Antony Bertrand-Grenier, et al.. Moment arms of the deltoid, infraspinatus and teres minor muscles for movements with high range of motion: A cadaveric study. Clinical Biomechanics, 2022, 97, pp.105685. ⟨10.1016/j.clinbiomech.2022.105685⟩. ⟨hal-04216939⟩
16 Consultations
41 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More