988 



THE NERVOUS SYSTEM 



coraco-brachialis it passes backward at an acute angle, and, accompanied by the 

 superior ulnar collateral (inferior profunda) artery, it pierces the internal inter- 

 muscular septum. After passing through the septum it runs downward, in a 

 groove in the medial head of the triceps (fig. 758), to the interval between the olec- 



FiG. 758. — Nerves of the Right Upper Arm viewed from in Front. (Spalteholz.) 



Musculo-cutaneous nerve 

 Muscular branch 



Deltoid — 



Coraco-brachialis 

 Median nerve 



Biceps brachii -- 



Musculo-cutaneous nerve 



Anastomosis with median 

 (variable) 



Muscular branch to biceps.—.-' 



Muscular branch to"~ y-^ ^^ "^^61 i 



brachialis 



Brachialis 



Lateral antibrachial cutane- 

 ous nerve 



Radial (musculo-spiral) nerve 



Supinator 



Deep radial 

 Brachio-radialis ?^--+ 



Superficial radial — 

 Radial artery — -; 



Pronator teres 



'Latissimus dorsi 



Teres major 

 Radial (musculo-spiral) nerve 



Muscular branches to long 

 head of triceps 



•""Ulnar nerve 

 --Brachial artery 



-3---Triceps (longhead) 



. Muscular branch to medial 

 head of triceps 



- Triceps (medial head) 



-- Medial inter-muscular septum 



Median nerve 



Muscular branch to 

 pronator teres 



■;:i- "Pronator teres 



Muscular branches to flexor 

 I carpi radialis, palmaris 



longus, and flexor digitorum 

 sublimis 



Flexor carpi radialis 



ranon process and the medial condyle of the humerus, and in this part of its 

 course it is closely bound to the muscle by the deep fascia. Immediately below 

 the medial condyle it passes between tiie two heads of the flexor carpi ulnaris, 

 along the medial side of the medial collateral ligament of the elbow, and it comes 

 into relation with the dorsal ulnar recurrent artery. 



