Posterior Forearm

Question 1

brachioradialis attaches from the ___ to the ___

Answer 1

lateral supracondylar ridge of humerus, distal radius lateral to styloid process

Question 2

brachioradialis is responsible for ___

Answer 2

elbow flexion

Question 3

brachioradialis is innervated by the ___ nerve which originates from ____

Answer 3

radial, C5-6

Question 4

extensor carpi radialis longus attaches from ___ to ___

Answer 4

lateral supracondylar ridge of humerus, base of 2nd metacarpal

Question 5

extensor carpi radialis longus is responsible for ___, ___, and ___

Answer 5

hand extension, radial deviation, assists with elbow flexion

Question 6

extensor carpi radialis longus is responsible innervated by the __ nerve which originates from ___

Answer 6

radial, C6-8

Question 7

extensor carpi radialis brevis is attached from ___ to ___

Answer 7

lateral epicondyle, base of 3rd metacarpal

Question 8

extensor carpi radialis brevis is responsible for ___ and ___

Answer 8

hand extension, radial deviation

Question 9

extensor digitorum attaches from ___ to ___

Answer 9

lateral epicondyle, extensor expansion of digits 2-5

Question 10

extensor digitorum is responsible for ___ and ___

Answer 10

extending phalanges, wrist

Question 11

extensor digitorum is innvervated by the ___ nerve which originates at ___

Answer 11

radial, C6-8

Question 12

extensor digiti minimi attaches from ___ to ___

Answer 12

lateral epicondyle, digital expansion of 5th digit

Question 13

extensor digit minimi is reponsible for ___

Answer 13

extension of 5th digit

Question 14

extensor digit minimi is innervated by ___ nerve which originates at ___

Answer 14

radial, C7-8

Question 15

extensor carpi ulnaris attaches from ___ to ___

Answer 15

lateral epicondyle, base of 5th metacarpal

Question 16

extensor carpi ulnaris is responsible for ___ and ___

Answer 16

wrist extension, ulnar deviation

Question 17

extensor carpi ulnaris is innervated by ___ nerve which originates from ___

Answer 17

radial, C6-8

Question 18

supinator attaches from ___, ____, and ___ to ___

Answer 18

lateral epicondyle, radial collateral ligament, supinator crest of ulna, lateral surface of proximal radius

Question 19

supinator is responsible for ___

Answer 19

forearm supination

Question 20

supinator is innervated by ___ nerve, which originates from ___

Answer 20

radial, C5-6

Question 21

extensor indicis attaches from ____ and ___ to ___

Answer 21

posterior surface of ulna, interosseous membrane, digital expansion of 2nd digit

Question 22

extensor indicis is responsible for ___

Answer 22

expansion of 2nd digit

Question 23

extensor indicis is innervated by ___ nerve which originates from ___

Answer 23

radial, C7-8

Question 24

abductor pollicis longus attaches from ____ to___ and ___

Answer 24

proximal radius/ulna/interosseous membrane, base of 1st metacarpal, trapezium

Question 25

abductor pollicis longus is responsible for ___, ___, and ___

Answer 25

thumb extension, abduction, radial deviation

Question 26

abductor pollicis longus is innervated by ___ nerve which originates from ___

Answer 26

radial, C6-8

Question 27

extensor pollicis brevis attaches from ___ and ___ to ___

Answer 27

posterior radial surface, interosseous membrane, base of 1st proximal phalange

Question 28

extensor pollicis brevis is responsible for ___, ____, and ___

Answer 28

extension of thumb at metacarpophalangeal joint, extension, abduction at carpometacarpal joint

Question 29

extensor pollicis brevis is innvervated by ___ nerve which originates from ___

Answer 29

radial, C6-8

Question 30

extensor pollicis longus attaches from ___ to ___

Answer 30

middle 1/3 of posterior surface of ulna/interosseous membrane, base of 1st distal phalanx

Question 31

extensor pollicis longus is innervated by ___ nerve which originates from ___

Answer 31

radial, C6-8

Question 32

the posterior compartment of the forearm general actions are ___ and ___, innervated by the ___ nerve, and blood supply from ___ artery

Answer 32

wrist extension, supination, radial, radial

Question 33

name the muscles of the superficial layer of the posterior compartment of the forearm

Answer 33

brachioradialis, extensor carpi radialis longus, extensor carpi radialis brevis, extensor carpi ulnaris, extensor digitorum, extensor digiti minimi

Question 34

name the muscles of the deep layer of the posterior compartment of the forearm

Answer 34

supinator, extensor indicis, abductor pollicis longus, extensor pollicis brevis, extensor pollicis longus

Question 35

the ___ nerve pierces the supinator and emerges as the ___ nerve

Answer 35

deep branch of the radial nerve, posterior interosseous