Innervation and nerve injury

Question 1

upper plexus palsies

Answer 1

Erb Duchenne
rupture of C5 and C6
causes waiter tip/dad snack hand

Question 2

lower plexus palsies

Answer 2

Klumpke paralysis
tearing of T1
inability to straighten fingers

Question 3

inability to abduct shoulder

Answer 3

damage to axillary artery
paralysis of teres minor and deltoid

Question 4

supracondylar fracture of humerus and inability to flex or pronate forearm

Answer 4

damage to median nerve

Question 5

hand of benediction

Answer 5

median nerve injury

Question 6

fracture of medial epicondyle

Answer 6

ulnar nerve damage
affects medial half of flexor digitorum profundus and flexor carpi ulnaris

Question 7

ulnar claw

Answer 7

lumbricals for digits 4 and 5 are paralysed
cant straighten fingers

Question 8

Saturday night/crutch palsy

Answer 8

damage to radial nerve via axilla pressure
causes wrist drop

Question 9

wrist drop

Answer 9

damage to radial artery
no extensors working