3. Posterior Forearm

Question 1

What nerve innervates all the muscles in the posterior forearm?

Answer 1

Radial

Question 2

List the muscles of the superficial layer

Answer 2

Brachioradialis
Extensor carpi radialis longus + brevis 
Extensor digitorum
Extensor digiti minimi
Extensor carpi ulnaris

Question 3

What is the function of brachioradialis?

Answer 3

Flexes arm at elbow

Question 4

What do extensor carpi radialis longus and brevis do?

Answer 4

Extend + abduct wrist

Question 5

What does extensor digiti minimi do?

Answer 5

Extends little finger

Question 6

What does extensor digitorum do?

Answer 6

Extends medial 4 fingers

Question 7

List the muscles of the deep layer

Answer 7

Supinator
Abductor pollicis longus
Extensor polices longus + brevis
Estensor indicis proprius

Question 8

What does supinator do?

Answer 8

supinates forearm

Question 9

Which joints does extensor pollicis longus extend?

Answer 9

Metacarpopharyngeal, interphalangeal, carpometacarpal joints of the thumb

Question 10

Which joints does extensor pollicis brevis extend?

Answer 10

metacarpopharyngeal and carpometacarpal joints of the thumb

Question 11

Which finger does extensor indices proprius extend?

Answer 11

index finger