ARTERIES 77 



Metaearpal (ist dorsal interosseous) : arises near or with 

 the posterior carpal ; anas, superior perforating of deep arch, 

 digital of superficial arch ; supplies adjoining sides of index 

 and middle fingers. 



Dorsalis pollicis (2) : arising near base of ist metacarpal, 

 course along sides of dorsum of thumb. 



Dorsalis indicis : courses along radial side of dorsum of 

 index, supplying abductor indicis. 



Princeps pollicis : arising as the artery enters palm, courses 

 between ist metacarpal and abductor obliquus pollicis to the 

 base of ist phalanx, where it divides into two terminal 

 branches, which run along the sides of the palmar surface of 

 thumb. 



Radialis indicis : arising near the preceding, passes between 

 ist dorsal interosseous and adductor transversus pollicis to 

 outer side of index-finger, sends a branch to superficial palmar 

 arch ; anas, digital of superficial arch. 



Deep palmar arch : Extent, from upper end of ist interos- 

 seous space to base of 5th metacarpal. It lies over the bases 

 of the metacarpal bones, and terminates by inosculating with 

 the deep branch of the ulnar. 



Branches : 



Recurrent : to front of carpus ; anas, carpal arteries. 



Palmar interossei (3) : in the three inner interosseous spaces 

 join digital of superficial arch at cleft of fingers, and an offset 

 from inner branch joins digital branch to inner side of 5th 

 finger. 



Superior perforating : pierce three inner dorsal interossei ; 

 anas, dorsal interosseous. 



THE ULNAR ARTERY. 



Extent. From bifurcation of brachial to end in superficial 

 palmar arch, coursing along outer side of flexor carpi ulnaris 

 to the palm ; accompanied by venae comites. 



Relations in the forearm. In front. Pronator radii teres, 

 flexor carpi radialis, palmaris longus, flexor sublimis, median 

 nerve in upper half; lower half, overlapped by flexor carpi 

 ulnaris tendon. 



Behind, Brachialis anticus, flexor profundus digitorum. 



Inner side. Flexor carpi ulnaris, the ulnar nerve in the 

 lower . 



Outer side. Flexor sublimis digitorum. 



Lies upon anterior annular ligament at wrist, external to 

 the ulnar nerve and pisiform bone. 



