Muscles of the posterior compartment forearm

Question 0

Brachioradialis insertion

Answer 0

lateral surface of distal end of radius proximal to styloid process

Question 1

Brachioradialis origin

superficial

Answer 1

Proximal two thirds of lateral supraepicondylar ridge of humerus

Question 2

Brachioradialis innervation

Answer 2

radial nerve C5 C6 C&7

Question 3

Main action of brachioradialis

Answer 3

Relative weak flexion of elbow joint

maximal when forearm is in midpronated

Question 4

Extensor carpi radialis longus origin

superficial

Answer 4

Lateral supra-epicondylar ridge of humerus

Question 5

insertion of extensor carpi radials longus

Answer 5

dorsal 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

Action of extensor carpi radialis breves

Answer 8

activates during fist clenching

Question 9

extensor carpi radialis breves origin

Answer 9

lateral epicondyle of humerus

Question 10

extensor carpi radialis breves insertion

Answer 10

dorsal aspect of base third metacarpal

Question 11

Innervation of Extensor carpi radialis breves

Answer 11

Deep branch of radial nerve C7 C8

Question 12

Extensor digitorum Origin

Answer 12

Lateral epicondyle of humerus

Question 13

Extensor Digitorum Insertion

Answer 13

Extensor expansion of 4 fingers

Question 14

Innervation of Extensor Digitorum

Answer 14

Posterior interosseous nerve C7 C8

continuation of deep branch of radial nerve

Question 15

Action Extensor digitorum

Answer 15

extends wrist
extends 4 finger primarily at metacarpopalangeal joint
secondarily at interphalangeal joint

Question 16

Extensor Digiti minimi Origin

Answer 16

lateral epicondyle of humerus

Question 17

Insertion of Extensor digiti Minimi

Answer 17

Extensor expansion of 5th finger

Question 18

innervation of Extensor Digiti Minimi

Answer 18

Posterior interosseous C7 C8

continuation of deep branch of radial nerve

Question 19

Action of Extensor Digiti Minimi

Answer 19

Extends wrist
Extends 5th finger primarily at the metacarpophalangeal joint
secondarily at the interphalangeal joint

Question 20

Extensor carpi ulnaris Origin

Answer 20

Lateral epicondyle of humerus

posterior border of ulna

Question 21

Insertion of Extensor Carpi Ulnaris

Answer 21

dorsal aspect of base of 5th metacarpal

Question 22

Innervation of Extensor Carpi Ulnaris

Answer 22

Posterior Interosseous C7 C8

Continuation of deep branch of radial nerve

Question 23

Action of extensor Carpi Ulnaris

Answer 23

Extends and adducts wrist joint

Question 24

Supinator Origin | Acronym RALSC

Answer 24

Lateral Epicondyle of humerus Radial collateral and annular ligament supinator fossa crest of ulna

Question 25

Supinator Insertion

Answer 25

Lateral, posterior and anterior surface of proximal 3rd of radius

Question 26

Supinator innervation

Answer 26

Deep branch of radial nerve C7 C8

Question 27

Action of supinator

Answer 27

Supinates forearm | rotates radius to turn palm anteriorly or superiorly

Question 28

Abductor Pollicis longus Origin

Answer 28

Posterior surface of proximal halves of ulna, radius and interosseous membrane

Question 29

Insertion of abductor pollicis longus

Answer 29

Base of 1st metacarpal

Question 30

Innervation of Abductor Pollicis

Answer 30

Posterior Interosseous nerve C7 C8 | continuation of deep branch of radial nerve

Question 31

Action of Abductor Pollicis longus

Answer 31

extend wrist | abduct thumb and extends it at carpometacarpal joint

Question 32

Extensor Pollicic longus origin

Answer 32

posterior surface of middle third of ulna and interosseous membrane

Question 33

Insertion of Extensor Policis longus

Answer 33

Dorsal aspect of base of distal phalanx of thumb

Question 34

Innervation of extensor pollicis longus

Answer 34

Posterior Interosseous nerve C7 C8 | continuation of deep branch of radial nerve

Question 35

action of extensor Pollicis longus

Answer 35

Extends wrist joint extends distal phalanx of thumb at interphalangeal joint extends metacarpophalangeal and carpometacarpal joint

Question 36

Extensor Pollicis Breves Origin

Answer 36

Posterior surface of distal third of radius and interosseous membrane

Question 37

Insertion of extensor pollicis breves

Answer 37

Dorsal aspect of base of proximal phalanx of thumb

Question 38

Innervation of extensor Pollicis breves

Answer 38

Posterior Interosseous nerve C7 C8 | continuation of deep branch of radial nerve

Question 39

Action of extensor Pollicis breves

Answer 39

extends wrist extends proximal phalanx of thumb at metacarpophalangeal and metacarpacarpal joints

Question 40

Extensor indicis origin

Answer 40

posterior surface of distal third ulna and interosseous membrane

Question 41

Extensor indicis insertion

Answer 41

extensor expansion of 2nd finger

Question 42

Innervation of extensor indicis

Answer 42

Posterior Interosseous nerve C7 C8 | continuation of deep branch of radial nerve

Question 43

Extensor indicis action

Answer 43

Extends wrist extends 2nd finger helps extend hand at wrist