The Nervus Ulnaris is a critical nerve that runs from the shoulder down through the arm and into the fingers. This nerve is also known as the ulnar nerve and is responsible for the sensation and movement in the hand. In medical terminology, the Nervus Ulnaris is referred to as the ulnar nerve. However, it is also commonly referred to as the funny bone nerve due to its sensitive location in the elbow joint. The condition that affects the Nervus Ulnaris is called ulnar nerve entrapment, which can cause numbness, tingling, and weakness in the hand. Other synonyms of Nervus Ulnaris include ulnar nerve, cubital tunnel syndrome, and ulnar neuropathy.