Radial

Question 1

radial brachial supply

Answer 1

C5-T1

Question 2

radial motor

Answer 2

triceps, extensors forearm, supination forearm, extension wrist + fingers

Question 3

radial anatomy

Answer 3

radial groove on humerus

elbow: anterior to lateral epicondyle via cubital fossa

Question 4

radial injury axilla

Answer 4

saturday night palsy = high radial nerve palsy
humerus dislocation/fracture
unopposed flexion, paralysed extensors: flexed elbow + wrist drop

Question 5

radial sensory

Answer 5

lateral, posterior forearm

Question 6

radial injury radial groove

Answer 6

fractured humerus

weak triceps, wrist drop, hand sensory loss only

Question 7

radial injury deep branch

Answer 7

radial head fracture / dislocation
no wrist drop, no sensory, forearm weak
finger drop, partial wrist drop (spared brachioradialis) so any wrist extension accompanied by radial deviation

Question 8

radial injury superficial branch

Answer 8

forearm trauma, tight jewellery, Wartenberg syndrome
no motor, sensory loss hand
maybe positive Finkelstein test: thumb into first sideways, bend wrist at thumb side up and down –> pain