The Posterior Limb. 217 



the distal end of the axillary border of the scapula between the 

 teres major and subscapulars, entering the axillary vein at about 

 the same place as the subscapular vein, or in common with the 

 latter. 



***The radial nerve (n. radialis) passes behind the brachial 

 artery to the posterior surface of the humerus. It perforates the 

 anconaeus medialis, appearing afterwards on the lateral side of the 

 brachialis in company with the collateral radial artery. A super- 

 ficial ramus, given off on the distal portion of the arm, accom- 

 panies the cephalic vein: it passes along the surface of the extensor 

 carpi radialis, dividing into branches for the dorsum ot the hand. 

 The remaining portion is chiefly distributed as the ramus pro- 

 fundus to the extensor muscles of the forearm. 



The median nerve (n. medianus) passes distad along the 

 medial surface of the arm, lying at first in front of the brachial 

 artery and then on its medial side. It accompanies the brachial 

 artery, passing beneath the head of the pronator teres, and then 

 traverses the forearm, in company with the radial artery, to the 

 volar surface of the hand. 



The ulnar nerve (n. ulnaris) lies behind the brachial artery. 

 Toward the distal extremity of the humerus it accompanies the 

 inferior ulnar collateral artery. It passes from the medial surface 

 of the elbow, between the anconaeus minimus and the base of the 

 olecranon, to the dorsal surface of the olecranon head of the flexor 

 carpi ulnaris, and then crosses the ulna obliquely, in company with 

 the ulnar artery, to the lateral border of the muscle and along it to 

 the insertion tendon. At the wrist it crosses the dorsal surface of 

 the tendon, and passing between the tendon of the sublimis and 

 the pisiform bone, reaches the volar surface of the hand. 



IX. THE POSTERIOR LIMB. 



Dissection on the side opposite to that of injection. The 

 dissection is largely a muscular one; to be conducted in the same 

 way as in the anterior limb. The corresponding muscle groups 

 should be compared with respect to the difference in orientation 

 of the equivalent segments. 



