THE REGION OF THE ELBOW 



57 



the sixteenth and seventeenth years. The actual line of union 

 corresponds to the proximal margin of the articular cartilage 

 and laterally from the point at which the cartilage ceases, to a 





FIG. 21. Elbow of Child, aged five. The centres of ossification for the 

 capitulum and for the head of the radius can be recognised, but the 

 medial epicondyle has not yet begun to ossify. 



point immediately proximal to the lateral epicondyle ; on the 

 medial side it coincides with the margin of the trochlea (Fig. 18). 

 The medial epicondylar epiphysis joins the diaphysis about one 

 year later. 



