In the forearm it gives off the following branches:  Ulnar nerve enters the palm of the hand via the Guyon's canal, superficial to the flexor retinaculum and lateral to the pisiform bone. Here it gives off the following branches:  Ulnar nerve is also known as "musician's nerve" as it controls the fine movements of the fingers. The ulnar nerve also provides sensory innervation to the fifth digit and the medial half of the fourth digit, and the corresponding part of the palm:  The ulnar nerve and its branches innervate the following muscles in the forearm and hand:    The ulnar nerve can suffer injury anywhere between its proximal origin of the brachial plexus all the way to its distal branches in the hand. It is the most commonly injured nerve around the elbow. Although it can be damaged under various circumstances, it is commonly injured by local trauma or physical impingement ("pinched nerve"). Injury of the ulnar nerve at different levels causes specific motor and sensory deficits:  At the elbow  At the wrist In severe cases, surgery may be performed to relocate or "release" the nerve to prevent further injury.