PLATE IV. 

 THE BEND OF THE ELBOW. 



In this plate is delineated the arrangement of the superficial veins and cutaneous 

 nerves at the bend of the elbow ; the basilic vein has been afterwards traced up to the 

 point where it pierces the deep fascia to join the vense comites of the brachial artery. 



The common arrangement of these veins is as follows : the median vein (a), which 

 begins in radicals over the ball of the thumb, runs up the middle of the forearm, and 

 divides into two about the lower border of the bicipital fascia an inner branch, the 

 median basilic (e), and an outer, the median cephalic (b) giving off a branch (k) which 

 pierces the deep fascia of the arm to join the deep veins. The median cephalic is joined 

 just above the outer condyle by the radial vein (c), which begins in radicals upon the 

 dorsal aspect of the first interosseous space, and runs up the outer side of the forearm pos- 

 teriorly, turning forwards at the elbow to join the median cephalic. The conjoined vrin 

 is then termed cephalic (d) ; it runs up along the outer side of the biceps, piercing 

 the fascia opposite the insertion of the deltoid, and, coursing up between this muscle and 

 the pectoralis major, it pierces the sheath of the axillary vessels, and opens into the 

 third portion of the axillary vein. It may communicate with the external jugular by 

 means of a branch passing over the clavicle. The median basilic the inner and usually 

 the larger branch is joined by the anterior (h) and posterior ulnar veins (g), either 

 separately or conjointly, opposite the internal condyle ; it is then called the basilic vein, 

 and, running up the inner side of the arm, pierces the fascia about the middle, joining 

 the venie comites of the brachial to form the axillary vein. The anterior ulnar vein 

 begins in radicals over the hypothenar eminence (the ball of the little finger), while the 

 posterior begins in radicals upon the dorsal aspect of the fourth interosseous space, 

 receiving the vein of the little finger (vena salvatella). 



The arrangement of theae veins may be likened to an ornamental M, but this 

 is not always well marked. 



