410 



ARTERIES. 



muscles in the course of the artery, 

 and Brachialis anticus muscles. 



They supply the Coraco-brachialis, Biceps, 



Fit 



219. The Surgical Anatomy of the Radial and Ulnar 

 Arteries. 



branch if Ulnar 



RADIAL ABTEBY. 



The Eadial artery appears, 

 from its direction, to be the 

 continuation of the brachial, 

 but, in size, it is smaller than 

 the ulnar. It commences at 

 the bifurcation of the brachial, 

 just below the bend of the 

 elbow, and passes along the 

 radial side of the forearm to 

 the wrist ; it then winds back- 

 wards, round the outer side 

 of the carpus, beneath the 

 Extensor tendons of the 

 thumb, and, running forwards, 

 passes between the two heads 

 of the first Dorsal interos- 

 seous muscle, into the palm 

 of the hand. It then crosses 

 the metacarpal bones to the 

 ulnar border of the hand, 

 forming the deep palmar arch, 

 and, at its termination, inos- 

 culates with the deep branch 

 of the ulnar artery. The 

 relations of this vessel may 

 thus be conveniently divided 

 into three parts, viz., in front 

 of the forearm, at the back 

 of the wrist, and in the hand. 

 Relations. In the forearm, 

 this vessel extends from op- 

 posite the neck of the radius, 

 to the fore part of the styloid 

 process, being placed to the 

 inner side of the shaft of that 

 bone above, and in front of it 

 below. It is superficial 

 throughout its entire extent, 

 being covered by the integu- 

 ment, the superficial and 

 deep fascias, and slightly 

 overlapped above by the 

 Supinator longus. In its 

 course downwards it lies 

 upon the tendon of the Bi- 

 ceps, the Supinator brevis, 

 the Pronator radii teres, radial 

 origin of the Flexor sublimis 

 digitorum, the Flexor longus 

 pollicis, Pronator quadratus, 

 and the lower extremity of 

 the radius. In the upper 



