Intra-individual variations in the bifurcation of the radial nerve and the length of the posterior interosseous nerve

Deep dissection of the anterior aspect of a left upper limb near the elbow showing the radial nerve traversing from right (proximal) through the cubital fossa to the forearm. The most medial branch is passing deep to form the posterior interosseus nerve, whereas the most lateral branch passes along the anterior forearm as the superficial terminal branch. In this specimen a prominent middle branch is also visible.

Complete radial nerves and their major branches after removal from the left and right upper limbs of one cadaver. The marker tool lies at the posterior cord of the brachial plexus. Distinct contralateral variation is visible at the proximal, mid and cubital fossa (left of image) regions of the nerves.