Posteror Forearm Muscles

Question 1

Which muscles are in the superficial layer

Answer 1

Brachioradialis, Extensor carpi radialis longus, Extensor carpi radialis brevis, extensor digitorum, extensor digiti minimi, and extensor carpi ulnaris

Question 2

Muscles of the posterior forearm have the general action of

Answer 2

extension of the forearm, digits, thumb

Question 3

Brachioradialis origin is

Answer 3

Proximal 2/3 of lateral supraepicondylar ridge of humerus

Question 4

Brachioradialis insertion is

Answer 4

Lateral surface of distal radius near stoyloid process

Question 5

Brachioradialis action is

Answer 5

Flexion at elbow with high reps

Question 6

All posterior forearm muscles are innervate by the

Answer 6

Radial nerve C5-T1

Question 7

Brachioradialis innervation is

Answer 7

Radial nerve C5-C7

Question 8

Brachioradialis vasculature is

Answer 8

Recurrent radial artery

Question 9

Extensor carpi radialis longus origin is

Answer 9

Lateral Supra-epicondylar ridges of humerus

Question 10

Extensor carpi radialis longus insertion is

Answer 10

Dorsal base of 2nd MC

Question 11

Extensor carpi radialis longus action is

Answer 11

Extension and radial deviation

Question 12

Extensor carpi radialis longus innervation is

Answer 12

Radial nerve C6-C7

Question 13

Extensor carpi radialis brevis origin is

Answer 13

Lateral condole of humerus via common extensor tendon

Question 14

Extensor carpi radialis brevis insertion is

Answer 14

Dorsal basal of 3rd MC

Question 15

Extensor carpi radialis brevis action is

Answer 15

Extension and abduction of wrist

Question 16

Extensor carpi radialis brevis innervation is

Answer 16

Radial nerve C7-C8

Question 17

Extensor carpi radialis brevis vasculature is

Answer 17

Radial artery

Question 18

Extensor digitorum origin is

Answer 18

Lateral condyle of humerus via common extensor tendon

Question 19

Extensor digitorum insertion is

Answer 19

Extensor expansion of medial 4 digits

Question 20

Extensor digitorum action is

Answer 20

Extends medial 4 digits at MCP joint, aids PIP joint

Question 21

Extensor digitorum innervation is

Answer 21

Radial nerve C7C8

Question 22

Extensor digitorum vasculature is

Answer 22

Posterior interosseous artery

Question 23

Extensor digiti minimi origin is

Answer 23

lateral condyle of humerus via common extensor tendon

Question 24

Extensor digiti minimi insertion is

Answer 24

Extensor expansion of 5th digit

Question 25

Extensor digiti minimi action is

Answer 25

Extension of 5th digit

Question 26

Extensor digiti minimi innervation is

Answer 26

Radial nerve C7C8

Question 27

Extensor carpi ulnaris origin is

Answer 27

Lateral epicondyle of humerus, posterior ulnar via aponeurosis

Question 28

Extensor carpi ulnaris insertion is

Answer 28

Dorsal base of 5th MC

Question 29

Extensor carpi ulnaris action is

Answer 29

Extension and ulnar deviation

Question 30

Extensor carpi ulnaris innervation is

Answer 30

Radial nerve C7C8

Question 31

Extensor carpi ulnaris vasculature is

Answer 31

Ulnar artery

Question 32

Muscles of the posteiror thumb deep layer are

Answer 32

Extensor indices, and supinator

Question 33

Extensor indices origin is

Answer 33

Posterior distal 1/3 of ulna and IOM

Question 34

Extensor indices insertion is

Answer 34

Extensor expansion of 2nd digit

Question 35

Extensor indices action is

Answer 35

Extends 2nd digit

Question 36

Extensor indices innervation is

Answer 36

Deep radial nerve C7C8

Question 37

Extensor indices vasculature is

Answer 37

Posterior interosseous artery

Question 38

Supinator origin of

Answer 38

Lateral epicondyle of humerus, radial collateral and annular ligaments, supinator fossa, crest of ulna

Question 39

Supinator insertion is

Answer 39

Lateral posterior and anterior surfaces of proximal 1/3 of radius

Question 40

Supinator action is

Answer 40

Supinates radius

Question 41

Supinator innervation of

Answer 41

radial nerve C7C8

Question 42

Supinator vasculature of

Answer 42

Recurrent radial artery

Question 43

Muscles of the posterior forearm thumb outcropping are

Answer 43

Abductor pollicus longus, extensor pollicus brevis, extensor pollicus longus

Question 44

Abductor pollicis longus origin is

Answer 44

Posterior proximal half of ulna + radius and IOM

Question 45

Abductor pollicis longus insertion is

Answer 45

Base of 1st MC

Question 46

Abductor pollicis longus action is

Answer 46

Abduction of thumb and extension and CMC joint

Question 47

Abductor pollicis longus innervation is

Answer 47

Radial nerve C7C8

Question 48

Abductor pollicis longus vasculature is

Answer 48

Posterior interosseous

Question 49

Extensor pollicis brevis origin of

Answer 49

Posteiror distal 1/3 of radius and IOM

Question 50

Extensor pollicis brevis insertion of

Answer 50

Dorsal base of proximal phalanx of thumb

Question 51

Extensor pollicis brevis action of

Answer 51

Extension of proximal phalanx and MCP and CMC joints. Helps radial deviation

Question 52

Extensor pollicis brevis innervation of

Answer 52

Radial nerve C7C8

Question 53

Extensor pollicis brevis vasculature of

Answer 53

Posteiror interosseous

Question 54

Extensor pollicis longus origin of

Answer 54

Posterior middle 1/3 of ulna and IOM

Question 55

Extensor pollicis longus insertion

Answer 55

Dorsal base of distal phalanx of thumb

Question 56

Extensor pollicis longus action of

Answer 56

Extension of distal phalanx of thumb at IP joint

Question 57

Extensor pollicis longus innervation at

Answer 57

Radial Nerve C7C8

Question 58

Extensor pollicis longus vasculature of

Answer 58

Posterior interosseous