66 ANATOMY IN A NUTSHELL 



Behind. — (1) Subscapular^, (2) Tendon of Latissimus dorsi, (3) Tendon 

 of Teres major, (4; Musculo-spiral nerve, and (5) Circumflex nerve. 



Outer Side.— (1) Coraco-brachialis, (2) Median nerve. (3) Musculo- 

 cutaneous nerve. 



Inner Side.— (1) Tina nerve. (2) Lesser internal cutaneous nerve, and 

 (3) Axillary veins. 



LESSON XV. 



Brachial artery. — Plato XYI-XYII.) — The brachial artery extend- from 

 the lower border of the Teres major, above which it is called Axillary, to about 

 one and a half inches below the elbow where it divides into the Radial and 

 Ulnar. It passes along the inner and fore part of the arm. being accompanied 

 by venae comites and is comparatively superficial. It has the following rela- 

 tions: 



1\ Front. — (1) Integument and fascia. (2) Bicipital fascia. (3) Median 

 basilic vein, (4) Median nerve, and (5) Overlapped by Coraco-brachialis and 

 Biceps. 



Behind. — (1) Triceps, (2) Musculo-spiral nerve. (3) Superior profunda 

 artery, (4) Coraco-brachialis (insertion), and (5) Brachialis anticus. 



Outer Side. — (1) Vena comes. (2) Median nerve (above), (3) Coraco- 

 brachial'^, and (4) Biceps. 



[nner Side. — (1) Vena come-. (2) Internal cutaneous nerve. (3) Ulnar 

 nerve, I b Median nerve (below), and (5) Basilic vein (upper half). 



[ts branches are the superior profunda, inferior profunda, nutrient, mus- 

 cular, anastomotica magna, and occasionally the vasa aberrantia. 



The superior profunda, the largest branch, arises from the inner and back 

 pari of the artery opposite the lower border of the Teres major. It winds back- 

 ward and outward with the musculo-spiral nerve in the musculo-spiral groove. 

 It gives off an anterior branch which pierces the external intermuscular septum 

 to anastomose with the radial recurrent. It continues behind the external 

 intermuscular septum with a branch of the musculo-spiral nerve to the An- 

 coneus, where it anastomoses with the anastomotica magna and interosseous re- 

 current. It supplies the Triceps and Anconeus. The anterior branch which 

 it gives off passes to the front of the elbow in the groove between the Supinator 

 longus ami the Brachialis amicus to the front of the external condyle. It gives 

 branches to the Deltoid, Brachialis anticus, and Triceps, and a branch to anas- 

 tomose with the circumflex artery. The artery continues as the posterior 

 branch. 



The inferior profunda may come from the superior profunda, but generally 

 comes from the brachial opposite the insertion of the Coraco-brachialis. It 

 accompanies the ulnar nerve to the back of the internal condyle, having pierced 

 the internal intermuscular septum from before backward. It anastomoses with 

 tin- anastomotica magna ami posterior ulnar recurrent. lt> anterior branch 

 extends to the front of the internal condyle to anastomose with the anastomo- 

 tica magna and anterior ulnar recurrent. 



