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Shoulderjoint muscle
muscles of the shoulder joint
Question | Answer |
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Origin: supraspinous fossa of scapula and fascia. Insertion: greater tubercle of humerus. Function: abduction of shoulder,stabilize the shoulder joint, supports downward pull of loaded arm. | Supraspinatus |
Origin: medial part of infraspinous fossa of scapula. Insertion: middle aspect of greater tubercle of humerus. Function: lateral rotation,stabilization | Infraspinatus |
Origin: Dorsal surface of upper lateral margin of scapula. Insertion:greater tubercle of humerus. Fumction: lateral rotaion | Teres minor |
Origin:surface of subscapular fossa. Insertion: lesser tubercle of humerus, function: medial rotation, stabilization | Subscapularis |
Origin: anterior superior border of clavicle. Insertion: deltoid tuberosity of humerus. function: flexion and weal medial rotation, abduction, extension of shoulder | deltoid |
Origin: Anterior surface of sternal half of clavicle. Insertion: lateral ridge of intertubercal groove. Function: adduction,medial rotation, flexion of extended shoulder | Pectoralis major |
Origin:flattened are of dorsal surface. Insertion: medial risge of intertubercal groove. Function: adduction,medial rotation,extension. | teres major |
Origin: Spinous process of T7 and T12. Insertion: floor of ontertuberular groove. Function: adduction,medial rotation,extension | Latissimus Dorsi |