226 



APPLIED ANATOMY. 



the tendon of the subclavius muscle and homologous with the ligamentum teres in 

 the hip. It is also called the superior glenohumeral ligament, in contradistinction 

 to some bands on the lower anterior part of the capsule which are called by some 

 anatomists the middle and inferior glenohumeral ligaments. Between the superior 

 above and the middle and inferior below is the opening by which the bursa of the 

 subscapularis muscle communicates with the joint. 



The glenoid ligament is the wedge- or cup-shaped ring of fibrocartilage which 

 deepens the glenoid fossa. It is attached around its edge to the rim of the fossa 

 and at its upper end receives the long tendon of the biceps, which divides and blends 

 with it on each side. At its lower part when it is attached to the bone it blends with 

 the anterior edge of the long tendon of the triceps. 



THE MUSCLES OF THE REGION OF THE SHOULDER. 



The shoulder embraces two sets of muscles: one connects the shoulder-girdle 

 with the trunk and the other the humerus with the shoulder-girdle. 



The inner end of the clavicle articulates with the sternum and gives a bony 

 support to the shoulder-girdle at this point. The rest of the shoulder-girdle, 



Supraspinat 

 Infraspinatu: 



Teres minor 



vator scapulae 



Rhomboideus 

 minor 



Rhomboideus 

 major 



Latissimus dorsi 



Long head of triceps 



Teres major 



FIG. 240. Scapular muscles. 



comprising the remainder of the clavicle and all of the scapula and bearing the 

 weight of the whole upper, extremity, hangs from and is supported and moved by 

 the muscles which pass from it to the vertebrae posteriorly and to the skull, hyoid 

 bone, and ribs anteriorly. 



Anteriorly the clavicle has attached to its upper inner third the clavicular origin 

 of the sternomastoid muscle; and on its under surface is the subclavius muscle, which 

 arises from the cartilage and anterior end of the first rib. These muscles aid in moving 

 the clavicle. Running from the third, fourth, and fifth ribs to the coracoid process is 

 the pectoralis minor muscle ; and on the side of the chest, passing to the posterior edge 

 of the scapula, is the serratus anterior (inagnus} muscle. It will be alluded to again. 



