sec ////; 



turning roinul the oblique flexor of tho fore-arm, uhnii,' with the radial 

 ncrvr, ami reaching beneath the short extensor, t<> <!< >< -ml, still with its 

 satellite nerve, in front of tho articulation of the elbow, \\ht-n- this branch 

 anastomoses with the anterior radial artery; it supplies all tho oh'cranian 

 muscles, except the long extensor, as well as tho oblique flexor of tho fore- 

 arm and tho anterior extensor of tho metacarpus. 



3. Epicomlyloid, internal collateral of the elbow, or ulnar artn >/. 

 Smaller than the external collateral, this artery arises at tho nutrient 

 foramen of the humerus, and proceeds backwards on the internal face of 

 that bone, to pass beneath the long extensor of tho fore-arm, by following in 

 a more or less flexous manner the inferior border of the middle extensor; 

 it then descends, at first behind the epicondyle, then on the fore-arm, which 

 it passes along for its whole length, underneath the aponeurotic sheath of 

 this region, between the oblique and the external flexor of tho metacarpus, 

 accompanied by the ulnar vein and nerve of tho samo name, and tho tendon 

 of the ulnar portion of the perforans muscle. Arriving near tho carpus, 

 this long branch anastomoses by inosculation with a branch from the 

 posterior radial artery. 



In its antibrachial course, this artery only gives off very attenuated 

 branches, whose study is of little importance. But before attaining tho 

 fore-arm, it furnishes : 1, Tho nutrient artery of tho humerus ; 2, Articular 

 ramuscules ; .3, More or less voluminous muscular branches, particularly 

 for the long extensor of the fore-arm, the middle extensor, and the sterno- 

 apoueuroticus : those which arrive in tho latter muscle traverse it only to 

 become subcutaneous alternately ; one of them accompanies tho principal 

 superficial vein of the fore-arm, and sends ramuscules into the bend of the 

 elbow. Regular in their distribution, these different arteries present 

 numerous varieties of origin, among which it is difficult to distinguish tho 

 most constant disposition. The last-mentioned vessel and tho nutrient 

 artery of the humerus, often emanate directly from the humeral trunk. 



4. Principal artery of the biceps, or coraco-radialis artery. This 

 originates a little below or above the preceding ; opposite to, or in front of 

 it, it usually divides into two branches : one ascending, the other descending, 

 which enter the substance of the muscle. 



1. Anterior Radial Artery. (Fig. 348, A.) 



Tho anterior radial artery, 1 the smallest of tho two terminal branches of 

 the humeral, separates itself at an acute angle from the posterior artery, 

 above the articular condyle of the humerus. It descends on the anterior 

 face of the ulnar articulation, passing beneath the inferior extremity of the 

 flexor muscles of the fore-arm and the superior extremity of the principal 

 extensor of the metacarpus, where it meets tho radial nerve ; in company 

 with this nerve it extends on the anterior face of tho radius, below the 

 anterior extensor muscle of the phalanges, to tho knee, where it becomes 

 very thin and breaks up into several ramuscules, which are continued on 

 the capsular ligament of tho carpal articulations, after anastomosing on 

 the inner side with the divisions of a branch furnished by the posterior 

 radial artery, and on the outside with the ramifications from tho interosscous 

 artery of the fore-arm. 



1 In Man this artery is absent, or rather it ia represented by an insignificant 

 muscular twig. . 



