Upper Extremity

Question 1

Latissimus Dorsi

Answer 1

 Adduction, medial rotation, extension of arm

 Thoracodorsal nerve

Question 2

o Trapezius

Answer 2

 Elevate/retract/depress shoulder; help rotate the scapula to abduct/raise the arm above 90 degrees
 Accessory nerve

Question 3

o Deltoid

Answer 3

Abducts arm 30-90 degrees

Axillary nerve

Question 4

Pectoralis major and minor

Answer 4

Flex arm at shoulder; adduct and medially rotate arm; protract and depress scapula

Question 5

Serratus anterior

Answer 5

 Protraction; together with trapezius, helps rotate scapula to abduct/raise arm above 90 degrees

 Long thoracic nerve

Question 6

Rhomboid major/minor

Answer 6

 Retracts scapula

 Dorsal scapular nerve

Question 7

Levator scapulae

Answer 7

 Elevates scapula

 Dorsal scapular nerve

Question 8

Supraspinatus

Answer 8

 Initiates abduction of the arm

 Suprascapular nerve

Question 9

Infraspinatus

Answer 9

 Lateral rotation of the arm

 Suprascapular nerve

Question 10

Subscapularis

Answer 10

Medial rotation of the arm

Superior and inferior subscapular nerve

Question 11

Teres minor

Answer 11

Lateral rotation of the arm

Axillary nerve

Question 12

Teres major

Answer 12

Medial rotation, extension of the arm

Inferior subscapular nerve

Question 13

Coracobrachialis

Answer 13

Flexes and adducts arm at shoulder

Question 14

Brachialis

Answer 14

Main flexor of arm

Question 15

Biceps brachii

Answer 15

Supinates arm at shoulder

Question 16

Triceps Brachii/anconeus

Answer 16

Extension of arm at elbow

Question 17

Pronator teres

Answer 17

Pronates hand

Median nerve

Question 18

Flexor carpi radialis

Answer 18

Flexes the wrist

Question 19

Palmaris longus

Answer 19

Flex wrist

Question 20

Flexor carpi ulnaris

Answer 20

Flex wrist

Ulnar nerve

Question 21

Flexor digitorum superficialis

Answer 21

Flexes digits at the PIP joint

Question 22

Flexor pollicis longus

Answer 22

 Flexion of thumb at MIP and IP joints

Question 23

Flexor digitorum profundus

Answer 23

Flexes digits at DIP

Question 24

Pronator quadratus

Answer 24

Pronate hand/forearm

Question 25

Brachioradialis

Answer 25

Flexes forearm

Question 26

Extensor carpi radialis longus

Answer 26

Extends and abducts wrist

Question 27

Extensor carpi radialis brevis

Answer 27

Extend and abduct wrist

Question 28

Extensor digitorum

Answer 28

• Extend middle 4 fingers at MCP and IP joints

Question 29

Extensor digiti minimi

Answer 29

Exten the little finger

Question 30

Extensor carpi ulnaris

Answer 30

• Extension and adduction of wrist

Question 31

Supinator

Answer 31

Supinate forearm

Question 32

Abductor pollicis longus

Answer 32

Abduct the thumb

Question 33

Extensor pollicis brevis

Answer 33

Extend the thumb

Question 34

Extensor pollicis longus

Answer 34

Extend the thumb

Question 35

Extensor indicis

Answer 35

• Extend the index finger

Question 36

Lumbricals

Answer 36

Flex at MCP, extend at DIP and PIP