THE BRACHIAL ARTERY. 



401 



Relation to Nerves. — The median 

 nerve descends in contact with the 

 artery, lying on its outer side at the 

 axilla, directly in front of it below the 

 middle of the arm, and on the inner 

 side at the elbow. Of the other large 

 l)ranches of the brachial plexus which 

 are closely connected with the axillary 

 arter\', none continue in the immediate 

 neighbourhood of the brachial artery 

 along the arm. The external cutaneous 

 and circumflex separate at once from 

 the vessel in the axilla, the musculo- 

 spiral soon turns backwards in the 

 muscnlo-spiral groove, and the inter- 

 nal cutaneous and ulnar nerves descend 

 vertically on the inner side of the 

 limb. 



,\m 



Fig 26c 



■C 



Pig. 263. — SnPEKFiciAL View of the Arteries 

 OF the front of the Fore-arm, and Hand 

 ^froiu Tiedemann). j 



a, deltoid muscle ; t, Liceps ; V, its semilunar 

 fascia ; c, scapular head of tlie triceps ; c', its 

 internal head ; d, pronator radii teres ; c, tiexor 

 carpi radialis ; /, palmaris longus ; /', its tendon 

 spreading in the upper part of the palmar fascia, 

 from which, on the inner side, the palmaris 

 lire vis muscle is seen rising ; g, flexor carpi 

 ulnaris ; h, supinator radii longus ; /, extensor 

 carpi radialis longior ; I, extensor ossis meta- 

 ■carpi pollicis ; m, flexor digitorum sublimis ; 

 1 , idaced on the tendon of the latissimus dorsi, 

 the lower part of the axillary artery, continued 

 into the brachial ; 2, superior profunda ; 3, 

 inferior profunda ; 4, anastomotic ; 5, near i\w. 

 division of the brachial artery into ulnar and 

 radial, points to the origin of the recurrent 

 radial artery ; 5', lower part of the radial artery, 

 where it gives off the superficialis volae, and turns 

 round the wrist ; G', the lower part of the ulnar 

 artery, near the place wliere it passes down to 

 form the superficial palmar arch ; 7, the super- 

 ticialis voIk, which joins it ; 8, 8, 8, 8, tirst, 

 second, third, and fourth digital bi'anclies of the 

 superficial arch to the inside of the little finger, 

 adjacent sides of the 4th and 5th, 3rd and 4th, 

 and 2nd and 3rd fingers ; 9, radialis indicis ; 

 ■on the thumb are seen the two branches of the 

 princeps pollicis artery. 



/ ./' 



a 



h-Mflr-m 



.7 / 



Branches. — The brachial artery 

 gives some small muscular branches, 

 which are directed outwards and back- 

 Avards to the coraco-brachialis, liiccps, 

 and brachialis anticus ; and the follow- 

 ing larger branches which incline in- 

 wards : — 



D i> 



