410 



Arteries of the Ann. 



Bete acroniiale 



Ramus acromialis 

 a. thoracoaeromialis 



M. deltoideus 



M. pectoralis major 

 (cut through) 



'^ 





M. sub- 

 scapularis 



M. coraco- 

 brachialis 



Ramus 

 deltoideus 



-A. profunda 

 brachii 



M. triceps 

 brachii 



(caput longuni) 



. A. collateralis 

 ulnaris superior 



M. biceps brachii 



A. brachialis 



. M. triceps brachii 

 (caput mediale) 



Septum iiiter- 

 musculare mediale 



M. brachialis 



A. collateralis 

 ulnaris inferior 



ulnaris 



VY 



i 



Kpicondylus 

 mcdialis 



Lacertus 



flbrosus 



. A. recurrens 

 radialis 



A. ulnaris 



A. radialis 



M. pronator 

 teres 



M. brachio- 

 radialis 



453. Arteries of the 

 right upper arm, 



viewed from in front. 



1. A. profunda Ibracliii (continued) 

 (see also Fig. 454): 



a) Ramus deltoideus (see also Fig. 451), 



goes off immetliately below the origin 

 of the artery or arises from the 

 a. brachialis or from the a. collate- 

 ralis ulnaris superior; it runs lateral- 

 ward, transversely over the anterior 

 surface of the humerus, covered by 

 the mm. coracobrachialis and biceps, 

 to the m. deltoideus and gives oft' 

 branches to these and to the m. 

 brachialis. 



b) y4. coliateiYilis media, runs downward 



in the substance of the caput me- 

 diale of the m. triceps and some- 

 times reaches the rete articulare 

 cvibiti, which it then helps to form. 



c) A. collateralis radialis (0. T. articu- 



lar branch of the superior profunda), 

 appears somewhat below the middle 

 of the upper arm between the caput 

 laterale and the caput mediale of 

 the m. triceps (with the n. cutaneus 

 antibrachii dorsalis of the n. ra- 

 dialis), runs jtist behind the septum 

 intermusculare laterale as far as the 

 epicondylus lateralis and there 

 opens into the rete articulare cubiti. 

 It supplies the neighboring muscles, 

 the skin' over the m. triceps and 

 partly also that over the ram. bra- 

 chialis and biceps. 



d) A. nutricia humeri (not illustrated), 



arises sometimes also from a muscu- 

 lar branch or from the a. brachialis 

 itself; it passes through the canalis 

 nutricius to the bone and marrow 

 of the diaphysis. 



2. A. collateralis ulnaris superior 



(0. T. inferior profunda artery) (see also 

 Figs. 454456), arises usually a little below 

 the preceding artery, runs downward with 

 the n. ulnaris on the medial surface of the 

 caput mediale m. tricipitis (behind the septum 

 intermusculare mediale) and enters into the 

 rete articulare cubiti near the olecranon. It 

 supplies the neiglibdring muscles aud skin. 



3. A. collateralis ulnaris inferior 



(0. T. anastomotica magna artery) (see also 

 Figs. 454 457), goes off somewhat above 

 the epicondylus medialis humeri, runs me- 

 dianward in front of the ra. brachialis, 

 perforates the septum intermusculare me- 

 diale, bends directly uptm tlie bone back- 

 ward and lateral ward and enters into the 

 rete articulare cubiti : it gives off branches 

 to the adjacent muscles. 



