THE REGION OF THE ELBOW 55 



posterior part of the capsule, and, subsequently, the dimple 

 proximal to the head of the radius becomes obliterated. The 

 deep fascia on the front of the elbow and the lacertus fibrosus 

 (bicipital fascia) are exceptionally strong, and therefore, if 



FIG. 19. Elbow of Child, aged four. Lateral View. The centre of ossifica- 

 tion for the capitulum is the only secondary centre present. It lies on a 

 plane anterior to the long axis of the humerus. A tuberculous focus is 

 seen in the proximal part of the shaft of the ulna. 



sinuses develop in connection with the joint, they will usually 

 be found on one or other side of the triceps tendon. 



The elbow-joint may be aspirated by inserting a trochar 

 from the lateral side, at right angles to the limb, immediately 

 proximal to the head of the radius. 



Ossification of the Distal Extremity of the Humerus. 

 In the infant the whole of the distal extremity of the humerus 



