Brachial Plexus

Question 1

C5-C6 myotome paralysis (brachialis, brachioradialis, biceps brachii, deltoid)

Answer 1

Erb-Duchenne palsy

Question 2

back spasms, motor & sensory deficits in musculocutaneous & radial nerves

Answer 2

backpacker’s palsy

Question 3

sudden onset of severe shoulder pain

Answer 3

acute brachial plexus neuritis (can be caused by neurologic amyotrophy)

Question 4

inflammation of brachial plexus

Answer 4

brachial neuritis

Question 5

prolonged hyperabduction of arm can cause?

Answer 5

compression of cords by coracoid process and pec minor tendon (parathesia, numbess, erythema)

Question 6

ischemia of upper limb, compression of axillary artery and vein

Answer 6

hyperabduction syndrome

Question 7

inferior plexus injuries from pulling on limb superiorly

Answer 7

Klumpke paralysis —-> claw hand (ulnar nerve)

Question 8

where is a brachial plexus block injected?

Answer 8

axillary, interscalene, & supraclavicular blocks; causes loss of sensation to structures innervated by brachial plexus