Medial cutaneous nerve of the forearm

Commencing on the medial side of the vessels this large nerve passes anterior to them and pierces the deep fascia on the medial side of the arm together with the basilic vein. It supplies skin over the lower part of the arm; the main part of the nerve passes into the medial side of the forearm.

This nerve is also known by a couple of other names including medial antebrachial curaneous nerve and internal cutaneous nerve.