2. Three Functional Branches

The ulnar nerve travels through muscle along the ulna bone in the forearm. The length of the nerve from the shoulder to the elbow joint is the arterial branch. It splits into three branches at the elbow. The muscular branch stimulates two muscles in the inner forearm: the palmar cutaneous branch carries signals to and from the palm of the hand, and the dorsal cutaneous branch controls movement in the pinky and half of the ring finger.

nerve branches, elbow joint, ulna Christoph Burgstedt / Getty Images
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