2. Shaft of the Ulna

Between both ends of the ulna is a long, thin section of bone. This section, the shaft, is triangular, with three borders: the anterior, the posterior, and the interosseous. Between each of the borders is a surface, the names of white reflect their position: anterior, posterior, and medial. Just below the coronoid process is an important bone projection, the ulnar tuberosity. The superior crest is another important bony landmark on the shaft of the ulna.

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