THE PosTERIOR LIMB. 2uy 
the distal end of the axillary border of the scapula between the 
teres major and subscapularis, entering the axillary vein at about 
the same place as the subscapular vein, of 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. Asuper- 
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. 
