Ulnar nerve

The ulnar nerve is one of the major nerves in the arm, running from the neck down to the hand. It helps control muscles and provides sensation, particularly to the pinky finger and half of the ring finger. When the ulnar nerve is compressed or injured, it can cause symptoms like tingling, numbness, or weakness in the hand, commonly referred to as "funny bone" sensations. This nerve is important for gripping and fine motor skills, and conditions affecting it can impact day-to-day activities like writing or using tools.