474 



THE MUSCLES AND FASCIA. 



joint, is inserted into the middle facet on the great tuberosity of the humerus. 

 The tendon of this muscle is occasionally separated from the spine of the scapula 

 by a synovial bursa which communicates with the synovial cavity of the shoulder- 

 joint. 



Relations. By its posterior surface, with the Deltoid, the Trapezius, Latissimus 

 dorsi, and the integument ; by its anterior surface, with the scapula, from which 



FIG. 305. Muscles on the dorsum of the Scapula and the Triceps. 



it is separated by the suprascapular and dorsalis scapulae vessels, and with the 

 capsular ligament of the shoulder-joint. Its loiver border is in contact with the 

 Teres minor, occasionally united with it, and with the Teres major. 



The Teres minor is a narrow, elongated muscle, which lies along the inferior 

 border of the scapula. It arises from the dorsal surface of the axillary border of 

 the scapula for the upper two-thirds of its extent, and from two aponeurotic 

 laminae, one of which separates this muscle from the Infraspinatus, the other from 

 the Teres major; its fibres pass obliquely upward and outward, and terminate 

 in a tendon which is inserted into the lowest of the three facets on the great 

 tuberosity of the humerus, and, by fleshy fibres, into the humerus immediately 

 below it. The tendon of this muscle passes across the capsular ligament of the 

 shoulder-joint. 



Relations. By its posterior surface, with the Deltoid, and the integument ; 

 by its anterior surface, with the scapula, and dorsal branch of the subscapular 

 artery, the long head of the Triceps, and the shoulder-joint ; by its upper border, 

 with the Infraspinatus; by its lower border, with the Teres major, from which it 

 is separated anteriorly by the long head of the Triceps. 



The Teres major is a broad and somewhat flattened muscle, which arises from 

 the dorsal aspect of the inferior angle of the scapula, and from the fibrous septa 

 interposed between it and the Teres minor and Infraspinatus ; the fibres are 



