posterior muscles of the forearm superficial layer

Question 0

brachioradialis insertion

Answer 0

lateral surface of distal end of radius proximal to styloid process

Question 1

brachioradialis origin

Answer 1

proximal 2/3 of lateral supraepicondylar ridge of humerus

Question 2

brachioradialis innervation

Answer 2

radial nerve (c5,6,7)

Question 3

brachioradialis action

Answer 3

drinking muscle
relatively weak flexion of elbow joint
maximal when forearm is in midpronated position

Question 4

extensor carpi radialis longus origin

Answer 4

lateral supra-epicondylar ridge of humerus

Question 5

extensor carpi radialis longus insertion

Answer 5

doesal aspect of base of 2nd metacarpal

Question 6

extensor carpi radialis longus innervation

Answer 6

radial nerve c6,c7

Question 7

extensor carpi radialis longus action

Answer 7

extend and abduct wrist joint

Question 8

extensor carpi radialis brevis origin

Answer 8

lateral epicondyle of humerus

Question 9

extensor carpi radialis brevis insertion

Answer 9

dorsal aspect of base of 3rd metacarpal

Question 10

extensor carpi radialis brevis innervation

Answer 10

deep branch of radial nerve (c7,c8)

Question 11

extensor carpi radialis brevis action

Answer 11

extend and abduct wrist joint

active during fist clenching

Question 12

extensor digitorum origin

Answer 12

lateral epicondyle of humerus

Question 13

extensor digitorum insertion

Answer 13

extensor expansions of medial 4 fingers

Question 14

extensor digitorum innervation

Answer 14

posterior interosseous nerve

continuation of deep branch of radial nerve

Question 15

extensor digitorum action

Answer 15

extends wrist joint
extends medial 4 fingers primarily at metacarpophalangeal joints
secondarily at interphalangeal joint

Question 16

extensor digiti minimi origin

Answer 16

lateral epicondyle of humerus

Question 17

extensor digiti minimi insertion

Answer 17

extensor expansion of 5th finger

Question 18

extensor digiti minimi innervation

Answer 18

posterior interosseous nerve

continuation of the deep branch of the radial nerve

Question 19

extensor digiti minimi action

Answer 19

extends wrist joint
extends 5th finger primarily at metacarpophalangeal joint
secondarily at interphalangeal joint

Question 20

extensor carpi ulnaris origin

Answer 20

lateral epicondyle of humerus

posterior boarder of ulna via a shared aponeurosis

Question 21

extensor carpi ulnaris insertion

Answer 21

dorsal aspect of base of 5th metacarpal

Question 22

extensor carpi ulnaris innervation

Answer 22

posterior interosseous nerve

continuation of the deep branch of the radial nerve

Question 23

extensor carpi ulnaris action

Answer 23

extends and adducts wrist joint

also active during fist clenching