3 2 4 



APPLIED ANATOMY. 



midway between pronation and supination. All fractures of the radius are to be treated 

 with the elbow flexed to relax the biceps muscle. It is to be marked that the 

 position of the lower fragment follows the position of the hand in pronation and 

 supination. Also that by bending the hand toward the ulnar side the lower fragment 

 tends to be tilted away from the ulna and thus the interosseous space is increased. 



Biceps 



Brachioradialis 



Prpnator 

 radii teres 



Site of fracture 

 Brachioradialis 



Pressure with the thumb and fingers between the bones tends to increase the inter- 

 osseous space and to some extent to counteract the action of the brachioradialis. 



On account of the upper fragment assuming a middle position the fracture is 

 dressed in this position with the thumb upward an internal angular splint is used. 

 Some surgeons prefer using the position of full supination. 



The difference in the width of the interosseous space when the hand is in full 

 supination and when it is in semisupination, though it may be slightly in favor of the 

 latter position, is too little to give it any preference on that account. 



