Ulnar Nerve Transposition
The ulnar nerve is a single nerve that arises from a group of nerves called the brachial plexus. It runs down the inner aspect of the arm, behind a bony prominence on the inner side of the elbow called the medial epicondyle, and all the way down to the hand, supplying sensation to the muscles of the forearm and hand along the way.
Ulnar nerve transposition is a procedure performed to move the ulnar nerve from behind the medial epicondyle to a suitable position where it is not irritated or pinched by this bony prominence. The word transposition means to change in position.