210 SURGICAL APPLIED ANATOMY. [Chap. xm. 



nutrient artery enters the bone about the insertion 

 of the coraco-brachialis and runs towards the elbow, 

 it would be divided in these amputations, and might 

 give trouble. 



CHAPTER XIII. 



THE REGION OF THE ELBOW. 



Surface anatomy. On the anterior aspect of the 

 elbow are seen three muscular elevations. One, above 

 and in the centre, corresponds to the biceps and its 

 tendon ; while, of the two below and at the sides, the 

 outer corresponds to the supinator longus and the 

 common extensor mass, and the inner to the pronator 

 radii teres and the common set of flexor muscles. 

 The arrangement of these elevations is such that two 

 grooves are formed, one on either side of the biceps 

 and its tendon. The grooves diverge above, and join 

 the outer and inner bicipital grooves, while below 

 they meet over the most prominent part of the 

 tendon, and thus form together a V-shaped depression. 

 The distinctness of these details depends upon the 

 thinness and muscular development of the individual. 

 In the inner of the two grooves are to be found the 

 median nerve and the brachial artery and its veins ; 

 while deeply placed below the outer groove are the 

 terminations of the musculo-spiral nerve and superior 

 profunda artery, with the small radial recurrent 

 vessel. The biceps tendon can generally be very 

 distinctly felt. Its outer border is more evident than 

 is its inner edge, owing to the connection of the 

 bicipital fascia with the latter side of the tendon. 

 Extending transversely across the front of this region 

 is a crease in the integument, the " fold of the elbow." 



