Nerves of UE

Question 1

Musculocutaneous

Answer 1

C5-7

Anterior/lateral to axillary artery

Question 2

What muscle does MC pierce?

Answer 2

Coracobrachialis then goes btw brachialis and biceps brachii

Question 3

What is after MC?

Answer 3

lateral antebrachial cutaenous nerve

radial side of forearm, lateral to biceps tendon

Question 4

Ulnar nerve

Answer 4

c7-T1

anterior and medial to axillary artery

Question 5

What does Ulnar pierce?

Answer 5

intermuscular septum and goes under Arcade of Struthers

Question 6

What is Arcade of Struthers?

Answer 6

aponeurotic band/ canal

btwn IM septum and medial head of triceps

proximal to medial epicondyle

Question 7

What tunnel does ulnar pass through?

Answer 7

Cubital Tunnel

Question 8

What are borders of cubital tunnel?

Answer 8

Roof: arcuate ligament of osborne
(prevents subluxation of ulnar nerve)

Floor: MCL on floor

Question 9

What muscles does ulnar go between to get to anterior ante brachium?

Answer 9

Flexor Carpi Ulnaris

Question 10

What distal tunnel does ulnar pass through?

Answer 10

Guyon’s Tunnel

Question 11

Borders of Guyon’s Tunnel

Answer 11

Floor-transverse carpal

Roof- Pisohamate ligament

Question 12

What does ulnar split into after Guyon’s?

Answer 12

Deep- motor

Superficial- sensory

Question 13

Radial Nerve

Answer 13

C5-T1

posterior to axillary artery

Question 14

What space does Radial pass through?

Answer 14

Triangular interval

Question 15

Radial nerve relationship to muscle?

Answer 15

deep to lateral head of triceps

pierces IM septum—-btwn brachialis and brachioradialis

Question 16

What tunnel does radial pass through?

Answer 16

Radial Tunnel

Question 17

Borders of radial tunnel?

Answer 17

Fibrous edge of ECRB and arcade of Froshe and then splits into deep and superficial radial

Question 18

What is path of deep radial?

Answer 18

after tunnel goes under Arcade of Froshe

pierces supinator and then becomes PIN

Question 19

Path of Superficial radial?

Answer 19

Deep to brachioradialis, emerges posterior to distal tendon, roof of snuff box

innervates lateral dorm of hand only sensory

Question 20

Median Nerve

Answer 20

c5-T1

1/2 medial - 1/2 lateral cord

anterior to axillary artery

Question 21

Path in Brachium

Answer 21

anterior brachium, medial to biceps brachii

Question 22

What ligament does median pass under?

Answer 22

Ligament of struthers

medial epicondyle- supracondylar process

Question 23

What does it run with in cubital fossa?

Answer 23

medial to brachial artery and biceps tendon

Question 24

What muscle does median go through?

Answer 24

Pronator Teres

Question 25

What nerve does Median give off?

Answer 25

AIN

Question 26

Orientation of Median at wrist?

Answer 26

lateral to FDS, gives off cutaneous branch before going into carpal tunnel

Question 27

Sensory innervation of median?

Answer 27

skin of lateral palm and dorsal tips of 3.5 fingers