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Brachial artery Commences lower border of teres major axillary vein on medial side median nerve lateral to it proximally but then crosses in front of it to lie medial ulnar nerve is posterior to it proximally but leaves it as it slopes downward thru the medial IM septum Branches o Muscular branches o Nutrient branch to humerus – enters bone near coracobrachialis attachment o Superior ulnar collateral (to posterior ulnar recurrent) o Inferior ulnar collateral (to anterior ulnar recurrent) o Terminal: Radial and ulnar arteries (bifurcation in middle of cubital fossa) Radial artery Medial to biceps tendon and over its insertion Traverses along insertion of supinator Over the insertion of pronator teres under brachioradialis Over the radial origin of FDS and origin of FPL Over the insertion of Pronator quadratus Under tendon of BR Branches o Inferior Cubital artery (antecubital radial flap) o Radial recurrent artery Ulnar artery Passes deep to the deep head of pronator teres (median nerve between the 2 heads) Passes under the fibrous arch of FDS with median nerve crossing it from medial to lateral Lies on FDP radial to the ulnar nerve Branches o Common interosseous artery Anterior interosseous artery Posterior interosseous artery (gives rise to interosseous recurrent artery)