Peripheral nerves of the distal UE

Question 1

The median nerve descends anterior to which structure in the distal UE?

Answer 1

Elbow joint

Question 2

The median nerve enters what anatomical structure along with the brachial artery?

Answer 2

Cubital fossa

Question 3

What does the median nerve descend between?

Answer 3

The two heads of the pronator teres

Question 4

Which nerve branches off of the median nerve?

Answer 4

AIN (anterior interosseous nerve), travels along the floor of the anterior compartment

Question 5

As the median nerve continues to descend in the distal UE, it descends between which two structures?

Answer 5

FDS and FDP

Question 6

The median nerve descends through the cubital fossa to supply which muscles?

Answer 6

Thenar and 1st two lumbricals in the hand

Question 7

What muscles receive motor supply from the median nerve?

Answer 7

Pronator teres, PL, FCR, DS, thenar group and first two lumbricals of the hand

Question 8

What muscles receive motor and sensory supply from the median nerve?

Answer 8

1/2 of FDP, FPL, pronator quadratus

Question 9

What muscles receive sensory supply from the median nerve?

Answer 9

Thenar side of palmer surface (hand), small distal area along the posterior surface of the thumb, index and middle fingers

*screen by light touch on physical exam

Question 10

What does the ulnar nerve descend posterior to?

Answer 10

Elbow

Question 11

The ulnar nerve enters the forearm through which structure?

Answer 11

Cubital tunnel

Question 12

The ulnar nerve descends between which two structures?

Answer 12

FCU and FDP

Question 13

The ulnar nerve continues on to supply what structures?

Answer 13

Majority of the intrinsic muscles of the hand

Question 14

The radial nerve descends anterior to which structure?

Answer 14

Elbow joint

Question 15

The radial nerve divides into how many branches?

Answer 15

Two: superficial and deep

Question 16

The superficial radial branch descends deep to which structure?

Answer 16

Deep to the brachioradialis (to supply sensation to the hand)

Question 17

The deep radial branch descends through which structure?

Answer 17

Supinator

Question 18

After passing through the supinator, the deep radial branch is renamed what?

Answer 18

Posterior interosseous nerve (PIN)

Question 19

The radial nerve has motor innervation in which muscles?

Answer 19

Brachioradialis and Extensor carpiradialis longus

Question 20

The deep branch of the radial nerve has motor innervation in which muscles?

Answer 20

Extensor carpialis brevis and supinator

Question 21

The posterior interosseous nerve has motor innervation in which muscles?

Answer 21

Extensor digitorum, extensor digiti minimi, extensor carpi ulnaris, extensor indices, the three outcropping muscles (EPL, EPB, APL)

Question 22

The radial nerve has sensory innervation in which structures?

Answer 22

Posterior web space of the hand