Inferior Ulnar Collateral Artery
The inferior ulnar collateral artery comes up about five or six centimeters higher than the elbow. From there it moves medially upon the brachialis, piercing the medial intermuscular septum and winding about the humerus amid the bone and the triceps. The inferior ulnar collateral artery merges above the olecranon with the deep brachial artery's posterior articular branch and the interosseous recurrent. An anastomotic branch is sent as the vessel moves over the brachialis. This branch penetrates the medial intermuscular septum and accompanies the posterior ulnar recurrent, amid the medial epicondyle and the olecranon. The branches that ascend and descend are also sent to accompany both the anterior ulnar recurrent, which is ahead of the medial epicondyle, and higher up the superior ulnar collateral.
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