Peripheral Nerve

Question 1

Hand of Benediction sign

Answer 1

Median neuropathy; AIN injury can still make a fist

Question 2

EMG normal in nerve injury for

Answer 2

2 weeks

Question 3

PIN

Answer 3

Finger extension and ulnar wrist extension

Question 4

NF 1 Criteria

Answer 4

1. 6+ cafe au lait macules ( greater than 5mm pubertal pts or greater than 15mm post pubertal)
2. 2 or more neurofibromas
3. Freckling of axilla or inguinal region
4. Optic glioma
5. characteristic osseous lesion- sphenoid wind dysphasia or thinning of long bone cortex
6. 2+ Lisch nodules
7. Family member with NF 1

Need 2 of above

Question 5

Worst prognosis for return of motor function

Answer 5

Ulnar

Question 6

Femoral neuropathy

Answer 6

Hip flexion and knee extension weakness

L4-knee extension
L2-4 thigh adduction
L5-S2 knee flexion

Question 7

Tarsal tunnel syndrome

Answer 7

Compression of the tibial nerve by the lancinate ligament on the medial surface of the ankle, posterior to the medial malleolus

Plantar foot pain that spares heal

Question 8

How to tell ulnar compression at elbow vs wrist

Answer 8

Test ulnar sensation on the dorsal surface of the hand since the dorsal sensory branch of the ulnar nerve leaves 2-3 inches proximal to the wrist

Ulnar compression at wrist (Guyons canal)- does not affect dorsal hand sensation

Question 9

Lateral antebrachial cutaneous is nerve is from

Answer 9

Musculocutaneous

Question 10

Cord input for median n

Answer 10

Motor-medial cord
Sensation-lateral cord

Ulnar is medial for both

Question 11

Common peroneal nerve

Answer 11

L4-S2

Question 12

Nerve on the surface of the anterior scalene

Answer 12

Phrenic

Question 13

Gilliatt-Sumner hand

Answer 13

Compression of the lower truck results in atrophy and weakness of the thenar muscles, mild weakness of the hypothenar, lumbrical, interossei muscles with hypesthesia in ulnar and medial antebrachial cutaneous nerve

Question 14

Very proximal C5 nerve root injury

Answer 14

Dorsal scapular nerve to the Rhomboid

Question 15

Nerve transfer for elbow flexion

Answer 15

Ulnar to musculocutaneous

Question 16

S1 radiculopathy

Answer 16

Plantar flexion and ankle eversion

Vs tibial- plantar flexion and inversion

Question 17

Preganglionic injury of T1

Answer 17

Normal sensory nerve APs
Horners syndrome-ipsi to injury
Loss of hand function

Question 18

Injury with normal sensory nerve conduction

Answer 18

Root avulsion bc injury is proximal to DRG

Question 19

Osborne’s ligament

Answer 19

Flexor carpi ulnaris aponeurosis
Roof of cubital Tunnel
Just distal to ulnar groove

Arcade of Struthers is proximal to elbow joint

Question 20

First branch of upper trunk

Answer 20

Suprascapular nerve

Question 21

Most useful test for neuroma in continuity

Answer 21

Nerve action potentials

Question 22

AIN

Answer 22

Flexor pollicicis longus
Flexor digitorum profundus 1
Prontator quadratus

Problems flexing thumb and index finger

Question 23

Adductor pollicis

Answer 23

Ulnar nerve

Question 24

Posterior cord

Answer 24

Axillary and radial nerve

Question 25

Only muscle supplied by lower trunk then posterior cord

Answer 25

Extensor digitorum communis

Question 26

Saphenous nerve

Answer 26

Adductor canal

Anterior medial leg

Question 27

Exposure of lateral cord

Answer 27

Resides within infraclavicular BP

Incision along deltopectoral groove

Question 28

Lateral femoral cutaneous nerve

Answer 28

L2-3

Injured during iliac crest bone harvest

Question 29

Musculocutaneous supplies

Answer 29

Coracobrachialis
Biceps
Brachialis
Lateral antebrachial cutaneous

Question 30

Aconeous

Answer 30

Radial nerve

Question 31

Hip adductor nerves

Answer 31

Obturator (L2-4)
Sciatic
Femoral

Question 32

Arm supination

Answer 32

Elbow straight- supinator supplied by radial

Elbow bent- supinator and biceps supplied by musculocutaneous

Question 33

Accessory to suprascapular nerve

Answer 33

Good option for C5 root injury

Question 34

Suoraclavicular brachial plexus exploration

Answer 34

Posterior SCM to level of clavicle