DISSECTION OF THE UPPER EXTREMITY 



61 



cleaned, the loose areolar tissue and fat in which they are era- 

 bedded being gradually removed. Secure first the subscapular 

 artery and the thoracodorsal nerve along the lower border of 

 the M. subscapularis, then the lateral thoracic artery (lower 

 border of M. pectoralis minor), next the long thoracic nerve 

 (lying on M. serratus magnus). The various lymph-glands are 



FIG. 14. 



coracobrach. et biceps (cap. breve) 



T*. cephalica 



\ Tendon of M. lat. dorsi 



Tendon of caput longum 

 \ ; / M. bicipitis 



M. deltoideus 



r M. teres major 

 Humerus 



: V. A. circ. post. 



N. axillaris 

 M. teres min. 



M. triceps (cap. long.) 

 Corpus scapulae 



Cross-section of the shoulder above the origin of the circumflex arteries, right side, segment distal 

 to the cut. Subject fixed in formalin chromic acid. The fat over the V. and A. circumflex posterior 

 and the N. axillaris has been removed to show the course of these structures. The N. radialis is seen 

 medial to the N. axillaris. The N. ulnaris lies anterior to the N. radialis. The two heads of the 

 median have just united and the N. musculocutaneus is separating off. (After Poirier et Charpy, Traite" 

 d'Anat. hum., Paris, 1901, 2 ed., t. ii. p. 93, Fig. 87.) 



to be studied carefully as they are exposed and may afterwards 

 be removed. The following structures are to be isolated and 

 studied, some of them being best seen after the dissection of the 

 M. pectoralis minor and the fascia coracoclavicularis. 



Lymphatic Glands. (Cf. Figs. 15, 86, and 93.) 



(a) Axillary lymph-glands (lymphoglandulae axillares}. 



(b) Pectoral lymph-glands (lymphoglandulae pectorales). 



