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If one were to inquire of the average practitioner the function of the olecranon process at the elbow, I am certain one would in a large percentage of instances receive essentially the correct answer, namely that active extension of the elbow joint is produced from the pull of the triceps muscle on this lever acting purely as a lever. I feel that there would be little confusion as to the importance of the leverage of the olecranon process in the movements of the elbow and arm. The influence of function on the lever at the top of the femur (head-neck-great trochanter) is of equal importance and identical in mechanical principle with that of the olecranon process, and yet few practitioners specializing in surgery of the joints have appreciated the importance of this action and its tremendous influence on the structure and function of the hip joint; at least no suggestions
ALBEE FH. THE LEVER AT THE TOP OF THE FEMUR AND ITS SURGICAL ELONGATION. JAMA. 1939;112(20):2037-2039. doi:10.1001/jama.1939.02800200035010