1. Muscles moving the Upper Extremities

2. Muscles that move the Humerus Pectoralis major Action: Flexes, adducts and rotates arm medially at shoulder Origin: Clavicle, sternum, costal cartilage of upper ribs Insertion: Humerus-greater tubercle

3. Latissimus dorsi Action: Extends, adducts and rotates humerus medially, retracts the shoulder (swimmers muscle) Origin: Spine of sacral lumbar and lower thoracic vertebra. Iliac crest, and bottom 4 ribs. Insertion: Intertubercular groove of the humerus.

4. Deltoid Action: Flexes and medially rotates arm, abducts arm, extends and laterally rotates arm. Origin: acromian process, spine of scapula, clavicle Insertion: Deltoid tuberocity of the humerous

5. Supraspinatus Action: Abducts arm Origin : Supraspinous fossa of scapula Insertion: Greater tubercle of humerus

6. Infraspinatus Action: Adducts and laterally rotates arm Origin: Infraspinous fossa of scapula Insertion: Greater tubercle of humerus

7. Teres minor Action: Adducts and laterally rotates arm Origin: upper lateral border of scapula Insertion: Greater tubercle of humerus

8. Teres major Action: Medially rotates and adducts arm Origin: Inferior angle and lateral border of scapula Insertion: Crest of lesser tubercle of the humerus

9. Muscles that act on the forearm Triceps brachii Action: Extend forearm Origin: Long head-infraglenoid tubercle of the scapula Lateral Head-posterior surface above radial groove. Middle Head-posterior humerous below radial groove. Insertion: Olecranon process of the Ulna

10. Pass, Fail, Pass, FailPronator TeresFlexor carpi radialisPalmaris longusFlexor carpi ulnaris

11. Pronator Teres

12. Flexor carpi radialis Flexor carpi ulnaris

13. Palmaris longus

14. THE 3 B’S THAT BEND THE ELBOW: Biceps brachii, Brachioradialis, Brachialis

15. Biceps brachii Action: Flex and supinate the forearm Origin: Short head- goes to the corocoid process of scapula Long head-supraglenoid tubercle of scapula. Insertion: radiotuberocity and fascia of forearm

16. Brachioradialis Action: Flexes forearm Origin: lateral supercondylar ridge of humerus. Insertion: Styloid process of radius

17. Brachialis Action: Flexes forearm Origin: The distal anterior surface of the humerus. Insertion: The coronoid process of the ulna

19. Pronators Pronator quadratus Pronator teres

21. Supinates forearm

22. Origin:

23. the laterally epicondyle of the humerous and crest of the ulna.

24. Insertion:

26. Palmar Interosseous muscles Action: Adduct digits 2,4 and 5 Origin: palmar surface of metacarpals 2,4,5 Insertion: sides of proximal phalange bases for fingers 2,4,5

27. Dorsal Interosseous Muscles Action: Abduct digits 2-4 Origin: adjacent sides of metacarpal bones. Insertion: dorsal tendons on fingers 2-5

28. Thenar Group Flexor pollicis brevis Opponens pollicis Abductor pollicis brevis Actions: Flexes thumb Abducts thumb Opposition of thumb Don’t need to know origins/insertions

29. Hypothenar Group Flexor digiti minimi brevis Abductor digiti minimi Opponens digiti minimi Actions: Flexes finger 5 Abducts pinky Opposition of pinky Don’t need to know origins/insertions