Nerves around the distal third of the humerus
Nerves on both sides of the distal humerus run very closely to the bone, especially the ulnar nerve, which perforates the medial intermuscular septum runs and then in its sulcus behind the medial epicondyle. It can be directly compressed in distal humeral fractures. The radial nerve perforates the lateral intermuscular septum as it follows the spiral groove on the humerus, to run anteriorly and distally. At the level of the radial head it divides into its deep and superficial branches.
The median nerve crosses the anterior capsule of the elbow joint, running into the forearm between the two heads of the pronator teres muscle.