PARTS COVERED BY DELTOID. 



33 



and l>y pulling the arm down from the scapula it will be found to 

 extend beneath the acromion as a large recess. The loose tissue and 

 fat are to be taken away from the circumflex vessels and nerve ; 

 and the size of the bursa having been looked to, the remains are to 

 be removed. The insertion of the muscle should be defined. 



FIG. 13. VIEW OF THE MUSCLES OP THE DORSUM OF THE SCAPULA, AND OF 

 THE CIRCUMFLEX VESSELS AND NERVE (ILLUSTRATIONS OF DISSECTIONS). 



Muscles : 



A. Supraspinatus. 



B. Infraspinatus. 

 c. Teres minor. 



D. Teres major. 



E. Latissimus dorsi. 



F. Deltoid. 



o. Triceps (long head). 

 H. Levator anguli scapulae, 

 j. Rhomboideus minor. 

 K. Rhomboideus major. 



Arteries : 



a. Posterior circumflex. 

 6. Branch to teres minor. 

 c. Dorsal scapular. 



Nerves : 



1. Circumflex trunk. 



2. Its cutaneous offset. 



3. Branch to teres minor. 



Parts covered by deltoid. The deltoid conceals the upper end of the 

 humerus, and those parts of the dorsal scapular muscles which are 

 fixed to the great tuberosity. Lower down are the circumflex vessels 

 and nerve, and the upper part of the biceps muscle. In front of 

 the humerus is the coracoid process with its muscles. 



Dissection. By following back the posterior circumflex vessels 

 and nerve through a space between the humerus and the long head 

 of the triceps (G), their connection with the axillary trunks will be 



DA. P 



, b 

 t ne deltoid. 



circumflex 

 ves?els > 



