Nerves of UE Flashcards
Musculocutaneous
C5-7
Anterior/lateral to axillary artery
What muscle does MC pierce?
Coracobrachialis then goes btw brachialis and biceps brachii
What is after MC?
lateral antebrachial cutaenous nerve
radial side of forearm, lateral to biceps tendon
Ulnar nerve
c7-T1
anterior and medial to axillary artery
What does Ulnar pierce?
intermuscular septum and goes under Arcade of Struthers
What is Arcade of Struthers?
aponeurotic band/ canal
btwn IM septum and medial head of triceps
proximal to medial epicondyle
What tunnel does ulnar pass through?
Cubital Tunnel
What are borders of cubital tunnel?
Roof: arcuate ligament of osborne
(prevents subluxation of ulnar nerve)
Floor: MCL on floor
What muscles does ulnar go between to get to anterior ante brachium?
Flexor Carpi Ulnaris
What distal tunnel does ulnar pass through?
Guyon’s Tunnel
Borders of Guyon’s Tunnel
Floor-transverse carpal
Roof- Pisohamate ligament
What does ulnar split into after Guyon’s?
Deep- motor
Superficial- sensory
Radial Nerve
C5-T1
posterior to axillary artery
What space does Radial pass through?
Triangular interval
Radial nerve relationship to muscle?
deep to lateral head of triceps
pierces IM septum—-btwn brachialis and brachioradialis