316 A MANUAL OF ANATOMY. 



anterior surface of the forearm as low as the ball of the 

 thumb. (c) The outer head of the median. 



From the inner cord, (a) The internal anterior tho- 

 racic. It passes upward between the axillary artery and 

 vein from the inner cord to the under surface of the pecto- 

 ralis minor muscle. Some filaments pass through the 

 minor and terminate in the major. The external and inter- 

 nal nerves form a slight interlacement with each other 

 between the two pectoral muscles, (b) The lesser internal 

 cutaneous descends to the floor of the axillary space 

 and enters into a loose plexus with the intercosto- 

 humeral nerve. The nerve itself is distributed to the 

 skin of the inner and back part of the arm over and 

 above the olecranon process, (c) The internal cutaneous 

 nerve, another branch from the internal cord, passes through 

 the axillary space, along the inner side of the arm above 

 the elbow, divides into two branches, the anterior, which 

 supplies the skin of the inner half of the front of the fore- 

 arm as low as the wrist, and the posterior branch, which 

 takes a similar supply upon the back of the inside of the 

 forearm, (d) The ulnar nerve. This continues the direct 

 course of the inner cord, descends along the inside of the 

 arm with the inferior profunda artery, behind the internal 

 condyle of the humerus with the recurrent branch of the 

 ulnar, between the two heads of the flexor carpi ulnaris 

 muscle, then between the flexor sublimis and profundus 

 digitorum muscles ; at the middle and upper thirds of the 

 forearm joins the ulnar artery at its inner side, keeps this 

 position with reference to the artery into the hand ; here it 

 divides into its terminal digital branches. 



Branches of the Ulnar Nerve. In the arm (behind the 

 condyle) articular to the elbow-joint. In the forearm, 



