388 



Fig. 273. 



ULNAE ARTERY. 



may give origin to the posterior circumflex 

 artery, and that its own origin is sometimes 

 transferred to a branch arising from the axillary 

 artery. 



The inferior profunda is likewise occasionally 

 absent, and on that account has not been recog- 

 nised by some anatomists as a regular branch of 

 the brachial artery. 



The anastomotic artery is sometimes much 

 reduced in size, and in that case the inferior 

 profunda takes its place behind the humerus. 



Fig. 273. DEEP ANTERIOR VIEW OP THE AR- 

 TERIES OP THE ARM, FORE-ARM, AND HAND 

 (from Tiedemaun). 



The biceps brachii, the pronator teres and mus- 

 cles rising from the inner condyle, the supinator 

 longus, the lower part of the flexor longus pollicis 

 and flexor profundus digitorura, the anterior an- 

 nular ligament of the carpus and the muscles of 

 the ball of the thumb, have been removed ; n, pro- 

 nator quadratus muscle ; 1, lower part of the 

 axillary artery continued into the brachial ; 2, 

 superior profunda branch ; 3, inferior profunda ; 

 4, ulnar anastomotic ; 5, upper part of the radial 

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

 radial artery giving off the superficialis volse 

 branch ; 5", the radial artery emerging from be- 

 tween the heads of the abductor indicis muscle ; 

 6, 6, the upper part of the ulnar artery with the 

 anterior aud posterior ulnar recurrent branches ; 

 6', the ulnar artery approaching the wrist and 

 descending into the superficial palmar arch which 

 has been cut short ; 6", the deep branch of the 

 ulnar artery uniting with the deep palmar arch ; 

 7 (marked only on one), three interosseous branches 

 from the deep palmar arch joining the palmar digital 

 arteries 8, 8, 8, which have been cut away from 

 their origin from the superficial arch to near their 

 division into the collateral digital arteries ; the 

 ulnar collateral of the little finger is represented 

 as rising in this instance from the deep ulnar 

 artery; 9, placed between the princeps pollicis and 

 radialis indicis branches of the radial artery ; 10, 

 lower part of the anterior interosseous artery 

 passing behind the pronator quadratus muscle ; 11, 

 anastomosis of the anterior carpal branches of the 

 radial and ulnar arteries with recurrent branches 

 from the deep palmar arch. 



ULNAE, ARTERY. 



The ulnar artery, the larger of the two 

 vessels into which the brachial divides, ex- 

 tends along the inner side of the fore-arm 

 into the palm of the hand, where, joining 

 a branch of the radial, opposite the mus- 

 cles of the thumb, it forms the superficial 

 palmar arch. In this course it inclines 

 at first downwards aud inwards, describing 

 a slight curve, the convexity of which is 

 directed inwards, and passes under cover of 



