Chap, xui.] REGION OF ELBOW. 211 



This fold is not a straight line, but is convex below. 

 It is placed some little way above the line of the 

 articulation, and its lateral terminations correspond to 

 the tips of the two condylar eminences. In backward 

 dislocations of the elbow the lower end of the humerus 

 appears about one inch below this fold, whereas in a 

 fracture of the humerus just above the condyles the 

 fold is either opposite to the prominence formed by 

 the lower end of the upper fragment, or is below it. 

 This crease is obliterated on extension. 



At the apex of the Y-shaped depression, about the 

 spot where the biceps tendon ceases to be distinctly 

 felt, and at the outer side of that tendon, the median 

 vein divides into the median basilic and the median 

 cephalic. At the same spot also the deep median vein 

 joins the superficial vessels. The median basilic vein 

 can be seen to cross the biceps tendon, to follow more 

 or less closely the groove along the inner border of the 

 muscle, and to join, a little above the internal condyle, 

 with the posterior ulnar vein to form the basilic trunk. 

 The median cephalic following the groove at the outer 

 margin of the biceps joins, about the level of the 

 external condyle, with the radial vein to form the 

 cephalic vein. The brachial artery bifurcates about 

 a finger's breadth below the centre of the bend of the 

 elbow. " The cororioid process of the ulna can be 

 indistinctly felt, if firm pressure is made in the 

 triangular space in front of the joint " (Chiene). The 

 points of the two condyles can always be felt. The 

 internal condyle is the more prominent and the less 

 rounded of the two. The humero-radial articulation 

 forms a horizontal line, but the humero-ulnar joint is 

 oblique, the joint surfaces sloping downwards and in- 

 wards. Thus it happens that while the external condyle 

 is only f of an inch (18 mm.) above the articular 

 line, the point of the internal condyle is more than 

 1 inch (28 mm.) above that part (Paulet). From the 



