Lecture 2: Compression Neuropathies

Question 1

Which nerve root reponsible for wrist extension and elbow flexion?

Answer 1

C6

Question 2

Which nerve root is associated with wrist flexion, elbow extension, and finger extension?

Answer 2

C7

Question 3

Pain caused by compression of the spinal nerve that radiates in the distribution of the defined nerve root describes what?

Answer 3

Radiculopathy

Question 4

A positive Hoffmann test indicates what?

Answer 4

Cervical myelopathy (i.e., cervical spinal stenosis)

Question 5

Which nerve provides the majority of the sensation to the dorsum of the hand?

Answer 5

Radial n.

Question 6

Radial nerve entrapment at the wrist will present how?

Answer 6

Sensation changes over posterolateral hand

Question 7

A positive “OK” sign is suggestive of what?

Answer 7

Anterior interosseous syndrome –> Median n.

Question 8

Froment’s sign where a pt must flex the thumb in order to pinch paper between 1st and 2nd digits is seen with what nerve entrapment syndrome?

Answer 8

Cubital Tunnel Syndrome –> Ulnar n.

Question 9

Which nerve roots are responsible for hip flexion?

Answer 9

L1, L2

Question 10

Which nerve roots are responsible for knee extension?

Answer 10

L2, L3

Question 11

Which nerve root is repsonsible for sensation of the inguinal crease?

Answer 11

L1

Question 12

Which nerve root is repsonsible for sensation of the anterior thigh?

Answer 12

L2

Question 13

Which nerve root is repsonsible for sensation of the anterior thigh just above knee?

Answer 13

L3

Question 14

Which nerve root is responsible for ankle dorsiflexion + sensation to the medial leg and foot?

Answer 14

L4

Question 15

Which nerve root is repsonsible for sensation of the lateral leg and dorsum of the foot?

Answer 15

L5

Question 16

Which nerve root is repsonsible for sensation of the lateral foot and plantar foot?

Answer 16

S1

Question 17

Numbness or burning pain on anterolateral thigh is pathognomonic for what?

Answer 17

Meralgia paresthetica: lateral femoral cutaneous n.

Question 18

Which nerve is affected in anterior tarsal tunnel syndrome and what are the findings?

Answer 18

• Deep fibular nerve (L4-S2) at inferior extensor retinaculum
• Pain over dorsomedial aspect of foot and worse at night
• Weakness of extensor digitorum brevis

Question 19

What are the sx’s of tarsal tunnel syndrome; due to compression of which nerve?

Answer 19

• Compression of posterior tibial n.
• Paresthesias of the plantar aspect of foot

Question 20

Majority of sciatica is caused by weakness of what?

Answer 20

Sacroiliac ligament

Question 21

Pain and tenderness 5cm distal to lateral epicondyle with wrist drop and pain with resisted supination is indicative of what?

Answer 21

Radial n. entrapment at Radial tunnel

Question 22

Achy pain in the mid/proximal forearm with pain elicited during resisted forearm pronation is likely due to entrapment of which nerve?

Answer 22

Median n. (Pronator Syndrome)

Question 23

What is the site of compression with a (+) Adson test looking toward vs. away the tested arm?

Answer 23

• Looking away = Scalene m.
• Looking toward = Rib 1

Question 24

Which SD finding of the fibular head may be seen with common fibular n. compression?

Answer 24

Posterior fibular head