The inner of the two bones in the forearm. It is wide at its upper end, and its olecranon process forms the point of the elbow. In its lower part it is more fragile and liable to be broken by a fall upon the forearm while something is grasped in the hand. Chipping of the olecranon process is a not uncommon result of falls upon the elbow. (See BONE, DISORDERS OF – Bone fractures.)