Chap. XII.] 



THE ARM. 



233 



the substance of the triceps, and immediate contact 

 of the bones be consequently prevented. 



Amputation through the middle of the 

 arm. Circular method : The parts divided in this 

 amputation are fully shown in Fig. 22. Flap 

 method : Two flaps of about equal size and shape 

 may be cut antero-posteriorly, the arm being well 

 rotated outwards. 

 In the anterior flap 

 would be the biceps 

 and the greater part 

 of the brachialis 

 antic us, with the 

 musculo - cutaneous 

 nerve between them, 

 and a small piece , 

 of the triceps from 

 the inner side of 

 the limb. The 



brachial vessels, the ^ 



median and ulnar <* 



nerves, and possibly 



the inferior profunda Fig> 22. A Transverse Section through the 

 artery are also middle of the Arm (Braune). 



found in this flap, 

 about the inner 

 angle of the stump. 



The basilic vein and internal cutaneous nerve 

 lie about the inner border of the anterior flap, 

 and the cephalic vein about its outer border. In 

 the posterior flap would be the triceps, any small 

 part of the outer portion of the brachialis not 

 divided in the anterior flap, the superior profunda 

 artery, and the musculo-spiral nerve. If the amputa- 

 tion be lower down in the arm, the ulnar nerve 

 and inferior profunda artery may be found in 

 the posterior instead of the anterior flap. Since the 



dia nerve ;S,ui n ar nerve; 4, musculo-spiral 



