head connects to glenoid

surgical neck is proximal border of shaft, site of fractures

Greater and lesser tubercle separated by intertubecular groove

there are two:

anterior contains the flexor muscles and the musculocutaneus and ulnar nerves

posterior contains the extensor muscles and radial nerve

flexes and supinates elbow/forearm

short head connects to coracoid

long head connects to supraglenoid

bicipital aponeurosis connects to radial tuberosity

musculotaneus nerve

brachial artery

workhorse of elbow flexors

deep to biceps

attached to humerus and ulna

musculoteneous nerve

brachial and radial recurrent arteries

flexes and adducts arm, holds up humerus

musculocutaneous nerve

brachial artery

extensor of elbow

Three heads:

long connects to infraglenoid tubercle

lateral- connects superior to radial groove

medial- connects inferior to radial groove

all attach at the other end to the posterior ulna and olecranon

radial nerve

branches below elbow into ulnar & radial terminal branches

branches:

profunda brachii (aka deep artery of the arm): largest, giving rise to middle and radial collaterals

superior and inferior ulnar collaterals