THE SHOULDER REGION 



of the sternal end of the. clavicle to the lower limit of the insertion 

 of this muscle, outlines the lower border of its clavicular head 

 and indicates the plane of separation usually adopted in removal 

 of the muscle in complete excision of the breast (Stiles). 



Coracoid process 

 Acromio-clavicular joint 



Acromion 



Greater tubercle 



FIG. i. Surface Landmarks of the Shoulder Region. 



The Deltoid, with its wide V-shaped origin from the anterior 

 border of the lateral part of the clavicle, the lateral border of 

 the acromion, and the lower border of the scapular spine and 

 its pointed insertion half-way down the lateral side of the 

 humerus, is a conspicuous landmark. It overlies the greater 

 tubercle (tuberosity), which is the most lateral bony point in 

 the body, and so gives the shoulder its smooth convex contour. 



Direct injuries around the greater tubercle of the humerus 



