640 



THE VEINS 



1 (ranch (the median cephahc) and an mner branch (tlie median basilic). The 

 median cephalic runs upwards and outwards to join the superficial radial vein. 

 The united trunk, then known as the cephalic, continues u]) the outer side of the 

 arm, and opens into the axillary vein. The median basilic runs upwards and 

 inwards to join the superficial ulnar vein. The trunk thus formed (the basilic) 

 courses up the inner side of the arm to join the inner brachial vena comes and 

 form the axillary vein. 



The dorsal venous plexus, which is situated on the back of the hand, some- 

 times takes the form of an irregular arch, stretching across from the radial to the 



Fig. 395.— The Bend of the Elbow with the Siperficial Veins, Left Side. 

 (From a dissection by Dr. Alder Smith in the Museum of St. Bartholomew's Hospital.) 



MEDIAN NERVE 

 Posterior branch of 

 anastomotica magna 

 BRANCHES OF 1 

 INTERNAL CUTA- 

 NEOUS NERVE I 



Posterior ulnar rein 



BrachialiB amicus 



Anterior branch of 

 anastoraotica magna 

 Anterior ulnar vein 



Median basilic rein 



MUSCULAR BRANCH 

 OF MEDIAN NER VE 



Tendon of biceps 

 Bicipital fascia 



Sraciiialis anticus 



Deep median vein 



Ulnar arlerv 



Pronator teres 



Biceps 



Internal vena 

 come* of 

 brachial artery 

 Basilic vein 



Brachialis 

 anticus 



Cephalic rein 



Brachial artery 

 EXTERNAL 



CUTANEOUS 



NER VE 

 Mnsculo-spiral 

 n. and ascending 

 branch of radial 

 reairrent artery 

 Radial rein 

 Median cephalic 



rein 

 Ascending hr. of 

 radial recurrent 

 RADIAL 

 NERVE 



Radial recurrent 



artery 

 Supinator 



longus 

 Descending br. 



of radial 



recurren t 

 Median vein 



RADIAL 

 NERVE 



I 



ulnar side; at other times, the form of two more or less distinct plexuses, a radial 

 dorsal and an ulnar dorsal; but an exactly similar arrangement is seldom met with 

 in any two consecutive bodies. 



Th(^ distal part of the arch or ]>lexus receives the digital veins from the fingers. 

 These digital veins, two to each finger, start from a minute plexus about the nail, 

 run along the finger, one on either side, to the cleft, where each unites with the 

 vein from the contiguous side of the neighljouring finger, and so form single trunks 

 Avhich {)roceed upwards to the arch. The veins of the iingers communicate at 

 fre(|Uent intervals by cross branches above and below the interi)halangeal joints. 



Here it may be noted, that whilst the veins wliich return the chief part of the 



