Posterior Forearm, Hand

Question 1

name the muscles in the superficial layer of the posterior forearm

Answer 1

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

Question 2

name the muscles in the deep layer of the posterior forearm

Answer 2

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

Question 3

which muscle in the superficial posterior forearm is involved with extension of the elbow

Answer 3

anconeus muscle

Question 4

which muscles in the superficial posterior forearm are involved with flexion at the elbow

Answer 4

brachioradialis

Question 5

which muscles in the superficial posterior forearm are involved with extension of the wrist or digits?

Answer 5

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

Question 6

name the muscles in the deep layer of the posterior forearm

Answer 6

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

Question 7

which muscles pass through the first compartment of the extensor retinaculum

Answer 7

abductor pollicis longus
extensor pollicis brevis

(long abductor and short extensor of the thumb)

Question 8

which muscles pass through the second compartment of the extensor retinaculum

Answer 8

extensor carpi radialis longus

extensor carpi radialis brevis

Question 9

which muscles pass through the third compartment of the extensor retinaculum

Answer 9

extensor pollicis longus

Question 10

which muscles pass through the fourth compartment of the extensor retinaculum

Answer 10

extensor digitorum 
extensor indicis (usually more medial)

Question 11

which muscles pass through the fifth compartment of the extensor retinaculum

Answer 11

extensor digiti minimi

Question 12

which muscles pass through the sixth compartment of the extensor retinaculum

Answer 12

extensor carpi ulnaris

Question 13

which muscles of the posterior forearm do not pass through the extensor retinaculum?

Answer 13

brachioradialis
anconeus
supinator

Question 14

compartment?

extensor digiti minimi

Answer 14

5th

Question 15

compartment?

extensor carpi ulnaris

Answer 15

6th

Question 16

compartment?

extensor indicis
extensor digitorum

Answer 16

4th

Question 17

compartment?

extensor pollicis longus

Answer 17

3rd

Question 18

compartment?

abductor pollicis longus
extensor pollicis brevis

Answer 18

1st

Question 19

compartment?

extensor carpi radialis longus
extensor carpi radialis brevis

Answer 19

2nd

Question 20

origin = lateral supracondylar ridge of humrus
insertion = distal radius above styloid process
innervation = main trunk of radial nerve
action = flexes forearm at elbow

Answer 20

brachioradialis

Question 21

origin = lateral supercondylar ridge of humerus 
insertion = base of second metacarpal 
innervation = main trunk of radial nerve
action = extensor of the wrist

passes through second compartment under extensor retinaculum

Answer 21

extensor carpi radialis longus

Question 22

origin = lateral epicondyle of humerus
insertion = base of third metacarpal 
innervation = deep branch of radial nerve
action = exstensor of the wrist

passes through second compartment under extensor retinaculum

Answer 22

extensor carpi radialis brevis

Question 23

origin = lateral epicondyle of humerus
insertion = extensor hood to middle and distal phalanges of four fingers
innervation = posterior interosseous nerve
action = extensor of digits

passes through fourth compartment under extensor retinaculum

Answer 23

extensor digitorum

Question 24

origin = lateral epicondyle of humerus
insertion = extensor hood of little finger
innervation = posterior interosseous nerve
action = flexor of the little finger

passes through fifth compartment under extensor retinaculum

Answer 24

extensor digiti minimi

Question 25

``` origin = lateral epicondyle insertion = base of fifth metacarpal innervation = posterior interosseous nerve action = flexor of the wrist ``` passes though sixth compartment under extensor retinaculum

Answer 25

extensor carpi ulnaris

Question 26

``` origin = lateral epicondyle insertion = upper quarter of ulna innervation = main trunk of radial nerve action = extensor of the elbow ```

Answer 26

anconeus

Question 27

``` origin = lateral epiconyle of ulna insertion= medial surface of radius innervation = deep branch of radial nerve action = rotator of radius over ulna ```

Answer 27

supinator

Question 28

origin = radius and ulna insertion = base of first metacarpal innervation = posterior interosseous nerve action =abduction of thumb muscle of anatomical snuff box goes through the first compartment under extensor retinaculum

Answer 28

abductor pollicis longus

Question 29

``` origin = radius insertion = proximal phalanx of thumb innervation = proximal interosseous nerve action = extensor of thumb ``` muscle of anatomical snuff box goes through the first compartment under extensor retinaculum

Answer 29

extensor pollicis brevis

Question 30

``` origin = ulna insertion = base of distal phalanx of thumb innervation = posterior interosseous nerve action = extensor of the thumb ``` muscle of anatomical snuff box goes through the third compartment under extensor retinaculum

Answer 30

extensor pollicis longus

Question 31

``` origin = ulna insertion = extensor hood of index finger innervation = posterior interosseous nerve action = extensor of the index finger ``` goes through fourth compartment under extensor retinaculum

Answer 31

extensor indicis

Question 32

extensor pollicis brevis

Answer 32

``` origin = radius insertion = proximal phalanx of thumb innervation = proximal interosseous nerve action = extensor of thumb ``` muscle of anatomical snuff box goes through the first compartment under extensor retinaculum

Question 33

extensor pollicis longus

Answer 33

``` origin = ulna insertion = extensor hood of index finger innervation = posterior interosseous nerve action = extensor of the index finger ``` goes through fourth compartment under extensor retinaculum

Question 34

abductor pollicis brevis

Answer 34

``` origin = ulna insertion = base of distal phalanx of thumb innervation = posterior interosseous nerve action = extensor of the thumb ``` muscle of anatomical snuff box goes through the third compartment under extensor retinaculum

Question 35

extensor indicis

Answer 35

``` origin = ulna insertion = extensor hood of index finger innervation = posterior interosseous nerve action = extensor of the index finger ``` goes through fourth compartment under extensor retinaculum

Question 36

supinator

Answer 36

``` origin = lateral epiconyle of ulna insertion= medial surface of radius innervation = deep branch of radial nerve action = rotator of radius over ulna ```

Question 37

brachioradialis

Answer 37

``` origin = lateral supracondylar ridge of humrus insertion = distal radius above styloid process innervation = main trunk of radial nerve action = flexes forearm at elbow ```

Question 38

extensor carpi radialis longus

Answer 38

``` origin = lateral supercondylar ridge of humerus insertion = base of second metacarpal innervation = main trunk of radial nerve action = extensor of the wrist ``` passes through second compartment under extensor retinaculum

Question 39

extensor carpi radialis brevis

Answer 39

``` origin = lateral epicondyle of humerus insertion = base of third metacarpal innervation = deep branch of radial nerve action = exstensor of the wrist ``` passes through second compartment under extensor retinaculum

Question 40

extensor digitorum

Answer 40

``` origin = lateral epicondyle of humerus insertion = extensor hood to middle and distal phalanges of four fingers innervation = posterior interosseous nerve action = extensor of digits ``` passes through fourth compartment under extensor retinaculum

Question 41

extensor digiti minimi

Answer 41

``` origin = lateral epicondyle of humerus insertion = extensor hood of little finger innervation = posterior interosseous nerve action = flexor of the little finger ``` passes through fifth compartment under extensor retinaculum

Question 42

extensor carpi ulnaris

Answer 42

``` origin = lateral epicondyle insertion = base of fifth metacarpal innervation = posterior interosseous nerve action = flexor of the wrist ``` passes though sixth compartment under extensor retinaculum

Question 43

anconeus

Answer 43

``` origin = lateral epicondyle insertion = upper quarter of ulna innervation = main trunk of radial nerve action = extensor of the elbow ```