Forearm compartments and innervation

Question 1

Superficial Posterior Forearm Muscles

Answer 1

(Extensors)

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

Question 2

Deep posterior Forearm muscles

Answer 2

Supinator 
Extensor indicis 
Extensor pollicis longus 
Extensor Pollicis Brevis 
Abductor Pollicis longus

Question 3

General innervation trend of the posterior forearm

Answer 3

All innervated by Radial nerve and its branches

Brachialis and ECRL = Radial
Supinator and ECRB = Deep Radial
All others = Posterior interosseous nerve

** remember Deep radial becomes the posterior interosseous after it comes through the supinator

Question 4

What innervates the Brachioradialis

Answer 4

Radial Nerve

Question 5

What innervates Extensor Carpi Radialis Longus

Answer 5

Radial Nerve

Question 6

What innervates Extensor Carpi Radialis Brevis

Answer 6

Deep Radial Nerve

Question 7

What innervates Extensor Digitorum

Answer 7

Posterior Interosseous Nerve

Question 8

What innervates Extensor carpi ulnaris

Answer 8

Posterior Interosseous Nerve

Question 9

What innervates Supinator

Answer 9

Deep Radial

Question 10

What innervates Extensor indicies

Answer 10

Posterior Interosseous

Question 11

What innervates Extensor Pollicis longus

Answer 11

Posterior interosseous nerve

Question 12

What innervates Extensor Pollicis brevis

Answer 12

Posterior interosseous nerve

Question 13

Superficial muscles of the anterior forearm

Answer 13

Pronator teres
Flexor carpi radialis 
Palmaris longus 
Flexor carpi ulnaris 
Flexor digitorum superficialis

Question 14

Intermediate muscles of anterior forearm

Answer 14

Flexor digitorum profundus

Question 15

Deep muscles of anterior forearm

Answer 15

Flexor pollicis longus

Pronator quadratus

Question 16

General innervation trent fro anterior forearm

Answer 16

all innervated by median nerve

EXCEPT: flexor carpi ulnaris = ulnar nerve
Flexor Digitorum Profundus = M & Ulnar

Question 17

what innervates pronator teres

Answer 17

median nerve

Question 18

what innervates flexor carpi radialis

Answer 18

median nerve

Question 19

what innervates palmaris longus

Answer 19

median nerve

Question 20

what innervates flexor carpi ulnaris

Answer 20

ulnar nerve

Question 21

what innervates flexor digitorum superficialis

Answer 21

median nerve

Question 22

what innervates flexor digitorum profundus

Answer 22

median nerve AND ulnar nerve

Question 23

What innervates flexor pollicis longus

Answer 23

median nerve

Question 24

what innervates pronator quadratus

Answer 24

median nerve

Question 25

what nerve passes through the heads of pronator teres

Answer 25

median nerve

Question 26

which flexor muscle is responsible for adduction of the wrist?

Answer 26

Flexor carpi ulnaris

Question 27

what is the action of dorsal interossei muscle

Answer 27

abduction "PAD, DAB"

Question 28

what is the action of palmar interossei muscles

Answer 28

adduction "PAD, DAB"

Question 29

which joint does the flexor digitorum superficialis NOT flex

Answer 29

DIP

Question 30

which forearm extensor does not originate from the common extensor tendon?

Answer 30

Extensor Carpi Radialis longus