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Flashcards for move upper extremities.

Pectoralis major

a skeletal muscle that adducts and rotates the arm

Latissimus dorsi

adducts and extends upper arm/shoulder, rotates humerus medially


a large triangular muscle covering the shoulder joint and serving to abduct and flex and extend and rotate the arm

Teres major

teres muscle that moves the arm and rotates it medially

Biceps branchii

Origin- Scapula near glenoid fossa. Insertion - Radial tuberosity of radius. Action-Flexes forearm.

Triceps branchii

Origin - Scapula and shaft of humerus. Insertion - Olecranon process of ulna. Action - Extends forearm.


O - Humerus, I - Ulna, A - Flex Elbow


Origin: long head- supraglenoid tubercle and glenohumeral labrum & short head- tip of the coracoid process of the scapula Insertion: radial tuberosity &bicipital aponeurosis Action: flexes the forearm at the elbow (when supinated) & supinates forearm from neutral & stabilizes anterior aspect of shoulder & flexes shoulder (weak if at all) Blood: muscular branches of brachial artery Nerve: musculocutaneous nerve, C5,6

Palmaris longus

Origin - Medial epicondyle of humerus. Insertion - Proximal phalanges of digits 2 to 5. Action - Flexes proximal phalanges.

Flexor carpi radialis

Origin - Medial epicondyle of humerus. Insertion - Base of metacarpals 2 and 3. Action - Flexor of digits 2 and 3.

Flexor digitorum superficialis

O: distal humerus, ulna, radius I: 2-5th digits A: flexes hand and fingers

Extensor digitorum

Extends wrist, metacarpophalangeal, and interphalangeal joints; tends to spread digits apart when extending metacarpophalangeal joints. O: Lateral epicondyle of humerus. I: Dorsal surfaces of phalanges II - V.

Extensor digiti minimi

O: ulnar side of extended digitorum belly I: joins tendon if extended digit to pinky PRIMARY ACTION: pinky extension

Extensor carpi ulnaris

Extends and fixes wrist when fist is clenched or hand grips an object; aids in ulnar flexion of wrist. O: Lateral epicondyle of humerus; posterior surface of ulnar shaft. I: Base of metacarpal V.

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