Peripheral Nerve

Question 1

From what nerve does the anterior interosseus branch from? What three muscles does it innervate?

Answer 1

Median nerve

Flexor digitorum profundus 1
Pronator quadratus
Flexor pollicis longus

Question 2

What side of the humeral head does the axillary nerve wrap around?

Answer 2

Posterior aspect, so it is susceptible to injury during should dislocations

Question 3

What peripheral nerve supplies most sensation to medial leg below the knee?
What is it a branch off of?
Where in the leg is it most likely to be compressed?

Answer 3

Saphenous nerve
Femoral nerve
Adductor canal

Question 4

What nerve roots does the femoral nerve arise from?
Where is it relative to the peritoneum?
What structure does it pass inferior to as it enters thigh and adductor canal?
The presence of weakness where indicates damage to the femoral nerve at the abdominal portion?

Answer 4

L2-:4
Retroperitoneal
Inferior to inguinal ligament
Psoas weakness

Question 5

What nerve roots does the lateral femoral cutaneous nerve arise from?
Where is it in reference to the anterior superior iliac spine?
Damage to it causes sensory loss where?
During what surgical procedures or positions may it be injured?

Answer 5

L2-L3
Medial and inferior
Anterolateral thigh but not below knee
Prone position and when harvesting iliac crest

Question 6

What three muscles does the musculocutaneous nerve supply?

What is its sensory branch?

Answer 6

Biceps, brachialis, corabrachialis

Lateral antebrachial cutaneous nerve (sensation to lateral forearm)

Question 7

Supination of the straight arm is from what nerve and muscle?

How about supination with arm flexed?

Answer 7

Radial nerve when straight and due to supinator muscle

When flexed from musculocutaneous nerve and brachialis

Question 8

Can patients with nerve roots avulsion injury get better on their own?

Answer 8

No, they generally need surgery

Question 9

Is it safe to remove fasicles which are normally supplying peripheral schwannomas?

Answer 9

Yes

Question 10

What muscle does the phrenic nerve course over?

Answer 10

Anterior scalene

Question 11

What muscles does the suprascapular nerve supply? What are their function, respectively?

Answer 11

Supraspinatus (first few degrees of shoulder abduction) and infraspinatus (external rotation of shoulder)

Question 12

Where is an incision made for a sural nerve biopsy?

Answer 12

MIdline of posterior calf since sural vein is easily accessible between heads of gastrocnemius

Question 13

Does the sural nerve have sensory or motor function?

What are of the leg does it affect?

Answer 13

Sensory

Provides sensation to lateral ankle and foot

Question 14

What nerve does the tibial nerve branch from and at what location?

Answer 14

Sciatic nerve at posterior leg just above popliteal fossa and then continues to course inferiorly

Question 15

What is hyperpathia?

Answer 15

When the same stimulus repeated leads to escalating pain response

Question 16

What artery often compresses CN V? How about CN VII?

Answer 16

CN V: SCA

CN VII: AICA

Question 17

What is the best test for distinguishing type I and type II CRPS?

Answer 17

Electrodiagnostic studies because type I occurs in absence of discernible injuries, type II occurs in presence of nerve injuries

Question 18

Patients presenting with hyperreflexia and the presence of intrathecal pumps for extended periods of time should pique awareness of what possible development?

Answer 18

Development of catheter tip granuloma which causes compression at level of catheter tip an UMN signs

Question 19

For what type of patients should the DREZ procedure be saved for?

Answer 19

Patients with nonmalignant pain that has been refractory to nerve procedures and not showing any signs of recovery

Question 20

What surgical treatment may be used for medically refractory migraine, cluster, or hemicrania continua headaches?

Answer 20

Trial of occipital nerve stimulation

Question 21

What is trigeminal deafferentation pain like?

Answer 21

Constant, burning pain, somewhat reduced in area of previous sharp, lancinating pain which usually occurs after an ablative type of procedure such as SRS

Question 22

The nervus intermedius runs besides what nerve in the ear canal and is associated with what neuralgia type?

Answer 22

Alongside the facial nerve and associated with geniculate neuralgia

Question 23

How can you tell between geniculate and trigeminal neuralgia?

Answer 23

The former often has DEEP ear pain

Question 24

For percutaneous cordotomy at high cervical area what sensation often occurs after the electrode is placed?

Answer 24

A warm sensation

Question 25

What AED may lead to agranulocytosis?

Answer 25

Carbamazepine

Question 26

Where does gabapentin bind?

Answer 26

Voltage gated calcium channels