32 THE SUPERIOR EXTREMITY 



of the upper limb. It enters the axilla at its apex, at the 

 outer border of the first rib, commencing as the continua- 

 tion of the subclavian artery. It lies, for a short distance, 



Posterior circumflex artery Anterior circumflex artery 



Subscapular artery 

 Musculo-cutaneous nerve 

 Axillary nerve (O.T. circumflex) 



Cephalic vein 

 Acrpmial artery 

 Lateral anterior thoracic nerve 

 Lateral cord of brachial plexus 

 Thoraco-acromial artery -. 

 Axillary artery, ist pai t 



Axillary vi 

 Subclavius muscle 



Pectoralis major 



Coraco-brachialis 

 Biceps brachii 

 (short head) 



Medial anterior 

 thoracic nerve 



Pectoral branch 



of thoraco- 



acromial aitery 



i ; Basilic vein 

 ' Brachial artery 

 Median nerve 



Fascial band connecting lat. 

 Jj^ 1 dorsi with long head of triceps 



i Medial cutaneous nerve of the 



! forearm 

 Ulnar nerve 



Medial cutaneous nerve of the arm 

 ( Teres major 

 Radial nerve (O.T musculo-spiral) 



Circumflex artery of scapula (O.T. 

 Y\ ' dorsalis scapula:) 

 1 Lower subscapular nerve 



! Subscapularis muscle 



f I Posterior division of a lateral cutaneous nerve 



Latissimus dorsi 

 Thoraco-dorsal nerve (O.T. middle subscapular) 



' Anterior branch of a 

 lateral cutansous nerve 



Long thoracic nerve 

 intercosto-brachial nerve 

 Lateral thoracic artery 

 (O.T. long thoracic) 



FiG. 16. The contents of the Axillary Space exposed by the reflection of the 

 Pectoralis Major and the subjacent fascia, and the removal of the fat an 

 the lymph glands. Part of the axillary vein has been removed to expose 

 the medial cutaneous nerve of the forearm and the ulnar nerve. 



on the medial wall of the axilla, crosses the fat in the angle 

 between the medial and posterior walls, and then runs along 

 the lateral wall to the lower border of the teres major ; there it 



