DISSECTING MANUAL. 



(long head) to the infraspinous fossa, often grooving the bor- 

 der of the scapula and always sending a branch (infra-scapular) 

 to the subscapular fossa. [828] 



Posterior Circumflex. A branch from the third part which 

 runs backward with the circumflex nerve through the quadri- 

 lateral interval between the Triceps (long head), Teres major 

 and minor, and humerus, and then around the latter to end 

 under the Deltoid. Its branches are muscular; acromial, to 

 that process ; descending, along the Triceps (outer head) ; ar- 

 ticular, to the shoulder joint ; nutrient, to the head of the hu- 

 merus; and terminal, to the Deltoid. Anterior circumflex: A 

 small branch from the third part, close to the preceding, 

 which runs outward around the front of the neck of the hu- 

 merus and sends a branch (ascending bicipital) upward in the 

 bicipital groove. [829] 



Brachial. Beginning at the lower border of the Teres major 

 this descends at the inner side of the Biceps, lying successively 

 on the Triceps (long and inner heads), Coraco-brachial is (inser- 

 tion), and Brachialis anticus. Entering the ante-cubital fossa 

 it divides opposite the neck of the radius into the radial and 

 ulnar. Its branches are as follows. Superior profunda: A 

 large branch arising high up, accompanying the musculo-spiral 

 nerve in the musculo-spiral groove. It divides into two 

 branches; one (posterior terminal) descends behind the exter- 

 nal intermuscular septum to the back of the external condyle ; 

 the other (anterior terminal) accompanies the nerve through 

 the septum and descends on it to the front of the external con- 

 dyle. Behind the humerus it also gives off a slender twig 

 which descends in the Triceps (internal head) to the back of 

 the elbow, a nutrient branch to the humerus posteriorly, 

 and an ascending branch. Muscular, to the muscles. Nutri- 

 ent, to the humerus anteriorly. [830] 



Inferior Profunda. A branch which descends with the 

 ulnar nerve, through the internal intermuscular septum, to the 

 back of the internal condyle. Anastomotic : A branch aris- 



[166] 



