Arteries of the Arm. 



411 



454. Arteries of the right upper arm, viewed from behind. 



(Tlie 111. triceps has been partially 

 removed, the other muscles, of the 

 upper arm have been completely 

 removed.) 

 A. radialis (radial artery) 

 (see also Figs. 453, 455460), ex- 

 tends radialward, slightly curved, 

 upon the in. supinator and then runs 

 almost straight to the wrist between 

 the m. brachioradialis on one side, 

 the mm. pronator teres, flexor carpi 

 radialis and flexor digitoruni subli- 

 mis on the other side ; it is covered 

 over in its upper portion by the 

 margin of them, brachioradialis and, 

 below, lies free, covered only by the 

 fascia antibrachii; above it lies, in 

 its course, upon the insei-tion of the 

 m. pronator teres, below upon the 

 ram. flexor poUicis longus and pro- 

 nator quadratus, and is accompanied 

 on its radial side by the ramus 

 superficialis n. radialis. Distalward 

 from the proc. styloideus radii it bends 

 to the back of the hand, covered 

 by the tendons of the mm. abductor 

 pollicis longus and extensor poUicis 

 brevis, then runs distalward beneath 

 the tendons of the m. extensor pol- 

 licis longus, passes between the bases 

 of the ossa un'tacarpalia I and II 

 into the palm and ends in the arcus 

 volaris profundus. Branches : 



1 . A. reciirrens radialis (ra- 

 dial recurrent artery) (see Fig. 456) 

 goes off directly after the arteiy 

 arises, bends upward and backward 

 like a hook along the n. radialis di- 

 rectly upon the ni. supinator; it sup- 

 plies the adjacent muscles and the 

 skin lying over them and sends off 

 a branch beneath the origin of the 

 m. brachioradialis thi-ough the sep- 

 tum intermusculare laterale back- 

 ward into the rete articulare cubiti 

 (see Fig. 457). 



2. Rami musciilares (see Fig. 

 455) in the forearm, numerous, to 

 the adjacent muscles and to the skin. 



3. Ramus volaris superficia- 

 lis (superficial volar branch) (see 

 Fig. 459), arises at the level of the 

 proc. styloideus radii, runs distal- 

 ward upon or partly between the 

 bundles of the m. abductor pollicis 

 brevis, otherwise covered only by 

 the thin fascia of the ball of the 

 thumb, and goes over usually in 

 the form of a curve into the arctis 

 volaris superficialis. It gives off 

 branches to the muscles and skin 

 of the thumb. 



Acrninion 



A. circumfiexa 

 humeri posterior 

 ^ M. triceps brachii 

 (caput longum) 

 M. triceps brachii 



(caput laterale) 

 A. profunda brachii 



A. coUateralis media 



N. radialis 



M. triceps brachii 

 (caput laterale) 



A. coUateralis radialis 



A. coUateralis 

 ulnaris superior 



A. coUateralis media 



A. coUateralis 

 ulnaris inferior 



Rete articulare cubiti 



N. ulnaris _ 



A. recurrens ulnaris 



A. interossea recurrens 

 Olecranon 



