THE SUPERIOR EXTREMITY 



subscapularis at the inferior angle of the scapula and is closely 

 associated with the subscapular vessels and the thoraco-dorsal 

 nerve. They receive efferents from the pectoral plexus and 

 afferents from the superficial layers of the back corresponding 

 to the thoracic part of the vertebral column. 



Pectoralis major, clavicular part 



Cephalic vein 

 Clavicle 



Pectoral branches of thoraco- 



acromial artery 



Pectoralis minor, partially 



reflected 



Infra -clavicular lymph glands 



Apical lymph glands _MS^. 



Central lymph 

 glands 



Thoraco-dorsal 

 |3C. r nerve 

 f i 7" Subscapular vein 



~3'i^S^~Tf-4 .Long thoracic nerve 



~~^T - Subscapular lymph glani 

 -gpJ Latissimus dorsi 

 Serratus anterior 



Pectoralis 

 major, pars 

 abdominalis 



External oblique 



FIG. 10. The Axilla and its Lymph Glands. A small part of the anterior 

 wall of the rectus sheath has been removed, and the pectoralis minor 

 has been partially divided. 



Abscesses arising in connection with this group may spread 

 in the same directions as in (2). They should be opened by an 

 incision parallel to the axillary border of the scapula, so as 

 to avoid injury to the subscapular vessels and nerve. 



4. The Apical lymph glands are situated at the apex of 

 the axilla and lie behind the costo-coracoid membrane. Some 



