UL: Arm Flashcards
Muscles innervated by radial nerve
BEST
Brachiradialis
Extensors
Supenator
Triceps
Anterior view of distal humerus
Note difference between condyle and epicondyle
Capitulum- radius
Trochlea- ulna
Posterior view of distal humerus
Proximal radius parts
Proximal ulna parts
Muscles of anterior compartment of the arm
Coracobrachialis
Biceps brachii
Brachialis
Origin and insertion of coracobrachialis
coracoid process to medial humerus
Origin and insertion of biceps brachii
Long head: supraglenoid tubercle. Short head: apex of coracoid process
To radial tuberosity
Origin and insertion of brachialis
Anterior humerus to tuberosity of ulna
Innervation of arm anterior compartment
musculocutaneous
Action of coracobrachialis
Shoulder flexion
Action of biceps brachi
Elbow flexion
Supination
(shoulder flexion)
Action of brachialis
Elbow flexion
Assists pronation
Origin and insertion of triceps brachii
Long head- infraglenoid tubercle
Medial head- posterior humerus
Lateral head- posterior humerus
to olecranon
Triceps innervation
Radial nerve
Action of triceps
Elbow extension
Shoulder adduction and extension
Brachial artery branches
Veins of arm
Nerves of anterior arm
Nerves of posterior arm
Borders of anterior cubital fossa
Pronator teras
Inter epicondylar line
Brachioradialis
Ligaments of elbow
Relations of nerves and arteries in ACF
Medial to lateral:
median nerve, brachial artery, biceps, radial nerve
Cubital tunnel
Ulnar nerve enters the forearm through this
Wrapped between the two heads of flexor carpi ulnaris
Ulnar nerve could get trapped and require release
2nd most common cause of entrapped nerve in upper limb (after carpal tunnel)
Borders of cubital tunnel
Medial: Medial epicondyle
Lateral/posterior: olecranon
(insertions of 2 heads flexor carpi ulnaris)
Roof: cubital tunnel retinaculum
floor: capsule of elbow joint
