The Ulnar Nerve is one of the major nerves in the arm, primarily responsible for sensation and movement in the hand. It runs from the neck down to the hand, passing through the elbow, where it is often referred to as the "funny bone." This nerve controls the muscles that allow for fine motor skills and provides feeling to the ring and little fingers. Injuries or compression of the Ulnar Nerve can lead to symptoms such as numbness, tingling, or weakness in the hand. Conditions like cubital tunnel syndrome can occur when the nerve is pressed at the elbow, affecting hand function. Proper diagnosis and treatment are essential for recovery.