Radiculopathy

Question 1

NCS findings of radiculopathy

Answer 1

SNAPs and CMAPs are normal.

Question 2

Classically, what would needle emg show for radiculopathy

Answer 2

Fibs or PSWs in 2 different muscles innervated by 2 different peripheral nerves originating from same nerve root

Question 3

C5, 6, 7, 8, T1, L4, 5, S1 reflexes

Answer 3

C5 - Biceps; C6 - brachioradialis; C7- triceps; L4-knee; L5 - hamstring; S1 - achilles

Question 4

Innervation of pectineus

Answer 4

Femoral nerve and obturator nerve

Question 5

Innervation of lumbricals

Answer 5

1st and 2nd = Median nerve

3rd and 4th = ulnar nerve

Question 6

Innervation of adductor magnus

Answer 6

Tibial portion of sciatic nerve and obturator nerve

Question 7

How much time after injury does radiculopathy show abnormal spontaneous activity on emg

Answer 7

1 week

Question 8

Other causes of radiculopathy

Answer 8

Herpes zoster
Inflammation (TB, Lyme, syphilis, HIV, etc)
Metastasis
Arachnoiditis
Diabetes
Abscess
Mass (meningioma, leukemia, lipoma, hematoma, etc)

Question 9

Innervation of biceps femoris

Answer 9

Long head = Tibial portion of sciatic nerve

Short head = Peroneal portion of sciatic nerve

Question 10

Innervation of Flexor pollicis brevis

Answer 10

Median nerve and ulnar nerve

Question 11

2 most common causes of radiculopathy

Answer 11

HNP and spinal stenosis

Question 12

Innervation of pectoralis major

Answer 12

Medial and lateral pectoral nerve

Question 13

Innervation of flexor digitorum profundus

Answer 13

Median nerve (AIN) and ulnar nerve

Question 14

How long after injury does radiculopathy show reinnervation

Answer 14

5-6 weeks

Question 15

The optimal number of muscles to screen in needle emg for lumbar or cervical radiculopathy is

Answer 15

6

Question 16

Innervation of brachialis

Answer 16

Radial and musculocutaneous nerve