Estimated Force and Moment of Shoulder External Rotation Muscles: Differences Between Transverse and Sagittal Planes

• Autores: Marcelo Peduzzi Castro, Jeferson Fagundes, Daniel Cury Ribeiro, Roberto Costa Krug, Felipe de Camargo Forte, Joelly Mahnic de Toledo
• Localización: Journal of applied biomechanics, ISSN-e 1543-2688, ISSN 1065-8483, Vol. 28, Nº. 6, 2012, págs. 701-707
• Idioma: inglés
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• Resumen

  • The aim of this study was to compare shoulder muscle force and moment production during external rotation performed in the transverse and sagittal planes. An optimization model was used for estimating shoulder muscle force production of infraspinatus, teres minor, supraspinatus, anterior deltoid, middle deltoid and posterior deltoid muscles. The model uses as input data the external rotation moment, muscle moment arm magnitude, muscle physiologic cross-sectional area and muscle specific tension. The external rotation moment data were gathered from eight subjects in transverse and six subjects in sagittal plane using an isokinetic dynamometer. In the sagittal plane, all studied muscles presented larger estimated force in comparison with the transverse plane. The infraspinatus, teres minor, supraspinatus and posterior deltoid muscles presented larger moment in sagittal when compared with transverse plane. When prescribing shoulder rehabilitation exercises, therapists should bear in mind the described changes in muscle force production.