| Extensor carpi radialis longus arises from the lateral epicondylar ridge of the humerus and inserts onto the second metacarpal bone. |
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| The retroversion of the humerus was then measured as the angle between the collum humeri axis and the epicondylar axis. |
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| The humerus is becoming less rounded and more triangular in appearance due to the development of the lateral epicondylar ridge and medial epicondyle. |
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| The epicondyles were palpated to identify the epicondylar axis. |
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| When using reduction forceps, care must be taken to prevent comminuting the medial epicondylar fragment. |
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