The definition of The Olecranon Process The olecranon , from the Greek olene meaning elbow and kranon meaning head, is a large, thick, curved bony eminence of the ulna , a long bone in the forearm that projects behind the elbow . It forms the most pointed portion of the elbow and is opposite to the cubital fossa or elbow pit. The olecranon serves as a lever for the extensor muscles that straighten the elbow joint. Structure of The Olecranon The olecranon is situated at the proximal end of the ulna , one of the two bones in the forearm . [1] When the hand faces forward ( supination ) the olecranon faces towards the back (posteriorly). It is bent forward at the summit so as to present a prominent lip which is received into the olecranon fossa of the humerus during extension of the forearm. [2] [3] Its base is contracted where it joins the body and the narrowest part of the upper end of the ulna. Its posterior surface, directed backward, is triangular, smoot...
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