Median

Question 1

median muscle supply

Answer 1

LOAF (thenar/pollicis + lateral 2 lumbricals)
lateral two lumbricals
opponens policis
abductor pollicis brevis
flexor pollicis brevis
Rest of intrinsic muscles by ulnar
\+ flexor forearms (except flexor carpi ulnaris +  flexor digitorum profundus by ulnar)
duck, grip, eat

Question 2

Hand pathologies

Answer 2

Hand Nerve Pathologies: DR. CUMAB
DR = Radial Nerve damage –> Drop Wrist
CU = Ulnar Nerve damage –> Claw Hand
MAB = Median Nerve Damage –> Ape Hand, Benediction Hand

Question 3

median sensory

Answer 3

palmar: middle
dorsal: fingertips

Question 4

carpal tunnel contents

Answer 4

9 tendons + median nerve
flexor tendons:
flex digit 4 superficial + 4 deep
flex pollicis longus

Question 5

carpal tunnel syndrome

Answer 5

c: idiopathic, thickened ligament/tendon sheath
wasted thenar muscles
numbness, tingling, pain, waking from sleep, worse in morning
Tinel (tapping), Phalen (praying)
splint dorsiflexion overnight, corticosteroid injection, surgical decompression
no ape / benediction hand (not complete palsy)

Question 6

above elbow

Answer 6

c: supracondylar humerus fracture
weak flexion + pronation of forearm
wasted thenar
hand of benediction when trying to fist
ape hand at rest (can't oppose thumb so can't make ok sign --> pinch grip, can't move thumb away from hand)

Question 7

at elbow

Answer 7

pronator teres syndrome

Question 8

forearm injury

Answer 8

anterior interosseous syndrome

c: tight cast, fracture

Question 9

at wrist

Answer 9

c: laceration (suicide)

Question 10

median brachial supply

Answer 10

C5-T1