Deltoid Muscle

Deltoid Muscle The structure indicated is the deltoid muscle. There are several muscles which act on the glenohumeral joint to produce movement at the shoulder. The deltoid is a large, powerful superficial muscle which is responsible for giving the shoulder its characteristic contour. The deltoid muscle is comprised of three sets of muscle fibres: Anterior fibres Lateral fibres Posterior fibres The various groups of fibres of the deltoid muscle originate on the clavicle and scapula and converge to insert onto the deltoid tuberosity of the humerus. The anterior fibres originate from the anterior border of the lateral third of the …

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