Radiculopathy Flashcards
NCS findings of radiculopathy
SNAPs and CMAPs are normal.
Classically, what would needle emg show for radiculopathy
Fibs or PSWs in 2 different muscles innervated by 2 different peripheral nerves originating from same nerve root
C5, 6, 7, 8, T1, L4, 5, S1 reflexes
C5 - Biceps; C6 - brachioradialis; C7- triceps; L4-knee; L5 - hamstring; S1 - achilles
Innervation of pectineus
Femoral nerve and obturator nerve
Innervation of lumbricals
1st and 2nd = Median nerve
3rd and 4th = ulnar nerve
Innervation of adductor magnus
Tibial portion of sciatic nerve and obturator nerve
How much time after injury does radiculopathy show abnormal spontaneous activity on emg
1 week
Other causes of radiculopathy
Herpes zoster
Inflammation (TB, Lyme, syphilis, HIV, etc)
Metastasis
Arachnoiditis
Diabetes
Abscess
Mass (meningioma, leukemia, lipoma, hematoma, etc)
Innervation of biceps femoris
Long head = Tibial portion of sciatic nerve
Short head = Peroneal portion of sciatic nerve
Innervation of Flexor pollicis brevis
Median nerve and ulnar nerve
2 most common causes of radiculopathy
HNP and spinal stenosis
Innervation of pectoralis major
Medial and lateral pectoral nerve
Innervation of flexor digitorum profundus
Median nerve (AIN) and ulnar nerve
How long after injury does radiculopathy show reinnervation
5-6 weeks
The optimal number of muscles to screen in needle emg for lumbar or cervical radiculopathy is
6