Deltoid: ORIGIN Lateral 1/3 clavical, acromion process and spine of scap, INSERTION Deltoid tuberosity, ACTION All fibers: Abduct the shoulder, ACTION Anterior fibers- Flex shoulder, medially rotate shoulder, Horizontally Adduct shoulder, ACTION Posterior fibers- Extend the shoulder, laterally rotate shoulder, horizontally abduct the shoulder, FEEL - Seated hand on upper arm have them lift elbow out against you. , Biceps Brachii: ORIGIN Short head - coracoid process of scap, ORIGIN long head - supraglenoid tubercle of scap, INSERTION Tuberosity of the radius and aponeurosis of biceps brachii, ACTION Flex the elbow, supinate the forearm, Flex the shoulder, FEEL Shake hands and flex elbow against resistance, feel bicep, Coracobrachialis: ORIGIN Coracoid process of the scapula, INSERTION Medial surface of the mid humeral shaft, ACTION Flex the shoulder, adduct the shoulder, FEEL supine arm at 90 deg, put one hand in crook of elbow and one close to armpit ask them to raise arm up against your hand in elbow. , brachialis: ORIGIN Distal half of anterior surface of humerus , INSERTION Tuberosity and coronoid process of ulna, ACTION Flex the elbow, FEEL Shake hands with partner put hand on bicep just north of elbow and have them push against hand, Supinator: ORIGIN Lateral epicondyle of humerus, radial collateral ligament, annular ligament, supinator crest of ulna, INSERTION Anterior, lateral surface of the proximal 1/3 of radial shaft, ACTION Supinate forearm, FEEL shake hands and have them rotate arm against your hand, feel just south thumb side of arm,

Shoulder/arm

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