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Across 4. origin; supior to spine of scapula, insertion; superiorly on the head of the humerus, joint; shoulder. assisits deltiod in abduction of the arm, weak lateral rotator. located in the rotator cuff 6. origin; scapula, insertion; top of radius and bicipital aponeurosis to medial part of forearm, joint crossed; shoulder and elbow. flexes elbow, supinates forearm, ans assists in flexion of the shoulder joint 14. origin; inferior to spine of scapula, insertion; laterally on head of the humerus, joint crossed; shoulder, rotates arm laterally, located in the rotator cuff 15. origin; T6-T12, lumbar and sacral vertebrae and iliac crest. insertion; top of humerus (anterior). joint crossed; shoulder. adducts and extends arm, assists in medial rotation of thearm. depresses shoulder girdle and tilts the pelvis forwards located in the shoulder joint 16. bal and socket joint formed by the head of the humerus and and the glenoid cavity 17. origin; sternum and ribs 1-6. insertion; top of humerus. joint crossed; glenohumeral joint. horizontal flexion, adduction, and medial rotation of the shoulder located in the shoulder joint 18. origin; C7 and T1-5, insertion; medial border of scapula, joint crossed; shoulder girdle (moves scapula relative to rib cage). retracts and downwardly rotates scapula, (works as synergist with pectoralis minor) located in the shoulder girdle 19. origin; long head on scapula just above shoulder joint, other two heads on the posterior part of the humerus. insertion; olecranon of ulna, joint crossed; elbow and shoulder, extends elbow, and assts in shoulder extension and aduction

Down 1. origin; anterior surface of scapula, insertion; anteriorly on head of humerus. joint crossed; shoulder, rotates arm medially 2. origin; C1-C4, insertion; medial border of scapula, between superior angle and root of the spine of the scapula. joint crossed; shoulder girdle. elevates scapula and assists in downwards rotation of scapula, laterally flexes the neck. located in the shoulder girdle 3. origin; laterally at the distal end of humerus, insertion; laterally at the distal end of the radius, joint crossed; elbow, flexes the forearm when it is semi pronated (as in drinking action) asists other flexors. 4. origin; front of ribs 1-8, insertion; anterior face surface of medial border of scapula, joint crossed; shoulder girdle. protracts and upwardly rotates scapula (works as synergist with trapezius) located in the shoulder girdle 5. origin; clavicle, acromion, and spine of scapula, insertion; lateral surface of humerus. joint crossed; glenhumeral. anteriorly flexes the shoulder and assists in horizontal flexion and medial rotation, abducts the shoulder and posterior fibres extend the shoulder and assist in lateral rotation located in the shoulder joint 7. origin C7, insertion spine of scapula and lateral edge of clavicle, crosses shoulder girdle, elevates, retracts, depresses, and upwardly rotates shoulder scapula located in the shoulder girdle 8. origin; front of ribs 3-5, insertion; coacoid process of scapula. joint crossed; shoulder girdle. protrast and downwardly rotates scapula (works as synergist with rhomboids) and elevates rib cage when breathing located in the shoulder girdle 9. origin; humerus, insertion; ulna, joint crossed; elbow, flexes elbow 10. origin; lateral border of the scapula, inferior angle. insertion; humerus, joint crossed; shoulder. medial rotation, adduction, extension of the shoulder joint. located in the shoulder joint 11. origin; lateral border of scapula near inferior angle, insertion; laterally on head of humerus, joint crossed; shoulder, rotates arm laterally. located in rotator cuff 12. all four muscles together hold the head of the humerus in the correct position relative to glenoid cavity 13. refers to the inclusion of the scapula and clavilce