578 



THE BLOOD-VASCULAR SYSTEM 



upper border of the pronator quadratus it divides into two branches, an anterior terminal 

 and a posterior terminal (fig. 473). . ,, , • j u xu j u u f *v« 



The volar interosseous artery is accompanied by two vems and by the deep branch ot the 

 median nerve which hes to its radial side. The artery is bound down to the interosseous 

 membrane by aponeurotic fibres. 



Fig. 470. The Volar Arteries of the Forearm and Hand. (After Toldt, "Atlas of 



Human Anatomy," Rebman, London and New York.) 



Biceps brachii — • ■ — 



Inferior ulnar collateral artery — 



Brachial artery 



Tendon of the biceps brachii — 



Brachio-radialis 



Radial recurrent artery 



Ulnar recurrent artery — 

 Supinator 



Common interosseous artery 

 flongus 

 Extensor carpi radialis ] 



I brevis 



Superior ulnar collateral artery 

 ■Medial intermuscular septum 



Ulnar artery 

 Flexor carpi ulnaris 



.Flexor profundus digitorum 



I' 



Flexor digitorum sublimis 



Brachio-radialis 

 Flexor pollicis longus-_._ff^ 



r 



Flexor digitorum profundus f 



Median nerve 



Pronator quadratus 



Flexor carpi radialis 

 Radial artery 



Superficial volar branch- ■"•^ 



Transverse carpal ligament 

 Abductor brevis pollicis 



Flexor brevis pollicis 

 Common volar digital arteries 



Adductor pollicis — 

 First dorsal interosseii._. 



Lumbricales --.-.- 



Pronator teres 

 Flexor carpi radialis 

 Palmaris longus 



Ulnar artery 



Flexor sublimis digitorum 



Median artery coming through the 

 median nerve 



Deep volar branches of ulnar artery 

 I Superficial volar arch 



- Flexor digiti V brevis 

 Abductor digiti V 



•^ Proper volar digital arteries 



The branches of the volar interosseous artery arc:— (i) 'iMu! median artery [a mediana] 

 is a lonK sloixler vessel which ariKcs from tiie volar interosseous immediately after the latter is 

 civcn olT from the common trunk. It passes forward between the fk>xor digitorurn prolundU3 

 and the flexor pollicis longus to the median nerve, with which it descends beneath the transverse 

 carpal (anterior aimularj ligament into the palm, and when of large size sometimes enters into 

 the formation of the superficial palmar arch. At times the artery arises from the common 



