![]() This is often referred to as ‘hitting your funny bone’. If you knock the inside of the elbow you can get numbness or buzz down the forearm into the fourth and fifth fingers. Direct trauma from a blow or impact, or repetitive trauma from overuse. What causes Ulnar nerve compression?Ĭauses of Ulnar nerve contusion fall into two categories. It also innervates (stimulates) the flexor muscles of the hand, allowing it to bend and move. It provides sensation to the forearm and fourth and fifth fingers. ![]() The ulna is on the little finger (pinky finger) side of the forearm with the radius bone alongside. It is called the ulnar nerve because it runs close to the ulna bone in the forearm. It is part of the brachial plexus nerve system and is one of the major nerves supplying the arm. The ulnar nerve starts in the neck and runs down the inside of the elbow and into the wrist and hand. If symptoms are reproduced then the tests are positive and Ulnar nerve contusion/compression is confirmed.
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