272 ANATOMY OF THE RABBIT 



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 fore- 

 arm, 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 



Dissect on the side opposite to that of injection. The dis- 

 section 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. 



The skin should be removed first from the thigh and back to 

 the mid-dorsal line, that on the leg and foot being stripped off later, 

 when the muscles of these parts are to be examined. 



1. Muscles arising from the ventral surface of the posterior thoracic 

 and lumbar vertebrae and inserted on the pelvic girdle, or on 

 the lesser trochanter of the femur. These muscles are chiefly 

 distinguished by their vertebral position, on account of which, 

 and on account of the fixed condition of the pelvic girdle, they 

 combine the characters of vertebral and appendicular muscles. 



(a) The psoas minor. Origin: Bodies of the four posterior 

 lumbar vertebrae. Insertion: Pecten of the pubis. The 

 flat, pointed tendon forms a right-angled cross with a liga- 

 mentous band which is stretched transversely from the 



