Ulna

The ulna is a long bone found in the forearm that stretches from the elbow to the smallest finger, and when in anatomical position, is found on the medial side of the forearm. It runs parallel to the radius, the other long bone in the forearm, and is the larger and longer of the two.Vertical section through the articulations at the wrist, showing the synovial cavities.Bones of left forearm. Anterior aspect.Bones of left forearm. Posterior aspect.Ligaments of wrist. Anterior viewLigaments of wrist. Posterior view.Position of ulna (red). Animation3D imageBones of the right arm, showing the ulna, radius, wrist and humerusCross-section through the middle of the forearm, showing the two bones and the muscles, nerves and blood vessels surrounding them. The ulna is a long bone found in the forearm that stretches from the elbow to the smallest finger, and when in anatomical position, is found on the medial side of the forearm. It runs parallel to the radius, the other long bone in the forearm, and is the larger and longer of the two.