posterior forearm

Question 1

what muscle’s tendon changes direction by passing around the dorsal tubercle of the radius?

Answer 1

extensor pollicis longus

Question 2

the abductor pollicis longus attaches from the proximal posterior ____, _____, and ____ membrane to the base of the __ ____ and ____

Answer 2

radius, ulna, interosseous, 1st metacarpal, trapezium

Question 3

what are the attachments of abductor pollicis longus

Answer 3

the proximal posterior radius, ulna, and interosseous membrane to the base of the 1st metacarpal and trapezium

Question 4

what are the actions of abductor pollicis longus

Answer 4

abducts and extends thumb at carpometacarpal joint and abducts hand at wrist (radial deviation)

Question 5

what is the innervation for abductor pollicis longus ?

Answer 5

radial nerve C6-8

Question 6

what are the attachments for brachioradialis

Answer 6

from the lateral supracondylar ridge of the humerus to the distal radius lateral to the styloid process

Question 7

what is the action of brachioradialis

Answer 7

flexes the elbow

Question 8

what is the innervation for brachioradialis

Answer 8

radial nerve C5-6

Question 9

the extensor carpi radialis brevis attaches from the ___ ___ of the humerus to the base of ___ ____

Answer 9

lateral epicondyle, 3rd metacarpal

Question 10

what are the attachments for extensor carpi radialis brevis

Answer 10

from lateral epicondyle of the humerus to the base of the 3rd metacarpal

Question 11

what are the actions of extensor carpi radialis brevis

Answer 11

extend the hand at the wrist and radial deviation

Question 12

what is the innervation of extensor carpi radialis brevis

Answer 12

radian nerve C6-8

Question 13

extensor carpi radialis longus attaches from the ____ _____ ____ of the humerus to the base of ____ _____

Answer 13

lateral supracondylar ridge, 2nd metacarpal

Question 14

what are the attachments of extensor carpi radialis longus

Answer 14

from the lateral supracondylar ridge of the humerus to the base of the 2nd metacarpal

Question 15

what are the actions of extensor carpi radialis longus

Answer 15

extend the hand at the wrist, radial deviation, and assist with flexion of the elbow

Question 16

what is the innervation of extensor carpi radialis longus

Answer 16

radial nerve C6-8

Question 17

extensor carpi ulnaris attaches from the ___ ____ of the humerus to the base of ___ ____

Answer 17

lateral epicondyle, 5th metacarpal

Question 18

what are the attachments for extensor carpi ulnaris

Answer 18

lateral epicondyle of the humerus to the base of the 5th metacarpal

Question 19

what are the actions of extensor carpi ulnaris

Answer 19

extend the wrist and ulnar deviation

Question 20

what is the innervation for extensor carpi ulnaris

Answer 20

radial nerve C6-8

Question 21

extensor digitorum attaches from the ___ ___ of the humerus to the ___ ___ of digits 2-5

Answer 21

lateral epicondyle, extensor expansion

Question 22

what are the attaches of extensor digitorum

Answer 22

lateral epicondyle of the humerus to the extensor expansion of digits 2-5

Question 23

what are the actions of extensor digitorum

Answer 23

extend phalanges primarily at metacarpophalangeal joint and secondly at interphalangeal joint. Also extends hand at the wrist

Question 24

what is the innervation of extensor digitorum

Answer 24

radial nerve C6-8

Question 25

extensor digiti minimi attaches from the ___ ___ of the humerus to the digital expansion of ___ ___

Answer 25

lateral epicondyle, 5th digit

Question 26

attachments of extensor digiti minimi

Answer 26

lateral epicondyle of the humerus to the digital expansion of the 5th digit

Question 27

what are the actions of extensor digiti minimi

Answer 27

extend digit 5 (metacarpophalangeal and interphalangeal joint)

Question 28

what is the innervation of extensor digiti minimi

Answer 28

radial nerve (C7-8)

Question 29

extensor indicis attaches from the ___ ___ of the ulna and ___ membrane to the ___ ___ of 2nd digit

Answer 29

posterior surface, interosseous, digital expansion

Question 30

attachments of extensor indicis

Answer 30

posterior surface of the ulna and interosseous membrane to the digital expansion of 2nd digit

Question 31

what are the actions of extensor indicis

Answer 31

extend digit 2 (metacarpophalangeal and interphalangeal joint)

Question 32

what is the innervation of extensor indicis

Answer 32

radial nerve C7-8

Question 33

extensor pollicis brevis attaches from the ___ ___ of the radius and ___ ___ to the base of ___ ___ ____

Answer 33

posterior surface, interosseous membrane, 1st proximal phalanx

Question 34

attachments of extensor pollicis brevis

Answer 34

the posterior surface of the radius and interosseous membrane to the 1st proximal phalanx

Question 35

action of extensor pollicis brevis

Answer 35

extends the thumb (metacarpophalangeal joint) and abducts carpometacarpal joint

Question 36

what is the innervation of extensor pollicis brevis

Answer 36

radial nerve C6-8

Question 37

extensor pollicis longus attaches from the middle ___ of the ___ ___ of the ulna and ____ membrane to the base of the ___ ___ ___

Answer 37

1/3 posterior surface, interosseous, 1st distal phalanx

Question 38

attachments of extensor pollicis longus

Answer 38

from the middle 1/3 posterior surface of the ulna and interosseous membrane to the base of the 1st distal phalanx

Question 39

action of extensor pollicis longus

Answer 39

extend thumb at carpometacarpal, metacarpophalangeal, and interphalangeal joints

Question 40

innervation of extensor pollicis longus

Answer 40

radial nerve C6-8

Question 41

supinator muscle attaches from the __ ___ of the humerus, radial ___ ___, and supinator crest of the ___ to the lateral surface of the ___ ____

Answer 41

lateral epicondyle, collateral ligament, ulna, proximal radius

Question 42

what are the attachments of supinator muscle

Answer 42

lateral epicondyle of the humerus, radial collateral ligament, and supinator crest of the ulna to the lateral surface of the proximal radius

Question 43

what is the action of the supinator

Answer 43

supinates forearm

Question 44

what is the innervation of the supinator muscle

Answer 44

radial nerve C5-6

Question 45

what are the actions of the posterior compartment of the forearm? innervation? blood supply?

Answer 45

- extension and supination - radial nerve - radial artery and posterior interosseous (ulnar artery)

Question 46

what is the function of extensor retinaculum?

Answer 46

directs tendons in precise way for precise movements

Question 47

deep branch of radial nerve ___ the supinator

Answer 47

pierces

Question 48

once the deep branch of radial nerve exits the supinator muscle, what is it's name changed to?

Answer 48

posterior interosseous nerve

Question 49

function of dorsal branch of ulnar netve

Answer 49

Postganglionic sympathetic and sensory