312 



MANUAL OF ANATOMY. 



Hence a suppuration starting in the little finger may 

 point in the region of the thumb or extend above the 

 wrist. Inflammations of the sheaths of the index, middle, 

 and ring fingers are limited to those fingers and do not as 

 a rule spread into the palm. 



The foregoing completes the dissection of the anterior 

 part of the upper extremity, excepting the study of the 

 formation of the brachial plexus, which was purposely 

 omitted until the neck had been dissected. Now, working 



Diag. 18. 



with the one dissecting the neck, disarticulate the clavicle 

 at its sternal end (having previously studied the ligaments 

 of this joint), divide the subclavius muscle near its costal 

 attachment, and carry the clavicle outward. This will give 

 sufficient room without entirely removing the clavicle. 

 For the third portion of the Sub c I avian Artery see page 109. 



The Brachial Plexus. Figs. 63, 64. 



The brachial plexus is formed by the anterior branches 

 of the fifth, sixth, seventh, and eighth cervical and the first 



