EEANCIIES OF THE EADIAL AETERY. 



415 



Fig. 271. — Arteries of tiie Outer anp Back 

 Part op the Arm and Hand, Superficial 

 View (from Tiedemann). j 



a, deltoid muscle ; 6, external humeral head of 

 triceps ; c, biceps brachii ; d, bracbiaJis anticus ; 

 t', sui^inator longiis ; /, extensor carpi radialis 

 longior ; g, brevier ; h, extensor communis digi- 

 torum and extensor minimi digiti ; /, extensor 

 carpi ulnaris ; I; anconeus ; I, flexor carpi ulnaris ; 

 m, extensor ossis metacarpi poUicis ; n, extensor 

 primi internodii pollicis ; o, tendon of the extensor 

 secundi internodii pollicis ; 1, 1, branches of 

 superior profunda artery appearing between the 

 triceps and brachialis anticus, and descending on 

 the outer supracondylar eminence to anastomose 

 with the branches of the recurrent radial artery ; 

 2, above the posterior annular ligament points to 

 the posterior carpal branch of the anterior inter- 

 osseous artery ; 3, posterior carpal branch of the 

 ulnar artery ; 4, radial artery taking its course be- 

 tween the outer lateral ligament of the wrist-joint 

 and the tendons of the extensor muscles before 

 passing near ii, between the two heads of the 

 abductor indicis : beneath the extensor tendons 

 is seen the posterior carpal arch, giving the third 

 and fourth dorsal interosseous arteries ; 6, the 

 inner dorsal artery of the thumb ; 7, the outer 

 dorsal artery of the index finger, and between 7, 

 and 7', the remaining dorsal digital vessels in the 

 spaces between the heads of the metacarpal bones, 

 near their communications with the palmar digital 

 vessels. 





Branches. — The branches of the ra- 

 dial artery may be arranged according as 

 they are given off in the fore-arm, on the 

 ■\yrist, and in the hand. 



A. The branches which arise from the 

 radial in the fore-arm are the radial 

 recurrent, the muscular branches, the 

 anterior carpal, and the superficial volar. 



The radial recurrent artery, which 

 varies much in size, arches upwards from 

 the radial soon after its origin, running 

 between the branches of the musculo- 

 ppiral nerve. It first lies on the supi- 

 nator brevis, and then on the brachialis 

 anticus, being covered by the supinator 

 lougus. In front of the outer condyle, 

 and in the interval between the two last 

 muscles, it anastomoses with the termi- 

 nal branches of the superior profunda. 



From the lower or convex side of this ar- 

 tery are given off several branches ; one, of 

 considerable size, to the supinator and exten- 

 sor muscles, and some beneath the latter to 

 anastomose wdth the posterior interosseous 

 branche.. It also supplies the supinator 

 brevis, and brachialis anticus in part. 







