The Skin Over The Back Of The Elbow is thicker than in front, and slightly corrugated, or even scaly. It possesses great freedom of movement, and presents a bursa over the posterior aspect of the olecranon, which is frequently affected by bursitis from pressure, constituting student's or miner's elbow. Subcutaneous bursting of the bursa may set up diffuse cellulitis. The ulnar nerve is frequently injured at the elbow on account of its exposed position, but it is occasionally covered by an accessory muscle, the efitrochleo-anconeus. Sometimes the nerve passes in front of the internal condyle.
The Elbow-Joint is a perfect example of a hinge, and depends for its strength chiefly upon the coaptation of the bony surfaces.