What is a funny bone?
A. In human anatomy, the funny bone is the ulnar nerve. It is a nerve that runs from the shoulder to the hand, at one part running near the ulna bone. The nerve controls feeling in your fourth and fifth fingers and is one of the nerves that controls the movement of the wrist. When you bump the the ulnar nerve it may cause it to compress suddenly, which causes the mild pain and tingling throughout the forearm. This is why it is sometimes called the funny bone. Another reason is that the humerus – the long bone between the shoulder and the elbow – is similar to the word ‘humorous’.
