FOREARM AND HAND 107 



two-thirds it is closely applied to the medial side of the 

 vessel. 



In the forearm the ulnar nerve gives off: 



I. Kami articulates. 

 ,. Ra mi Muscu.ares, 



3. Kami cutanei, { 



The rami articulares come from the ulnar nerve as it lies 

 in the interval between the olecranon and medial epicondyle 

 of the humerus, and pass to the elbow joint. 



The rami musculares are given off high up in the fore- 

 arm, and supply the flexor carpi ulnaris and the medial part of 

 the flexor digitorum profundus. 



The ramus cutaneus palmaris is a minute twig which has 

 already been seen piercing the fascia of the forearm im- 

 mediately above the transverse carpal ligament. It arises 

 about the middle of the forearm and proceeds distally upon 

 the ulnar artery, to the coats of which it gives fine filaments. 



The ramus dorsatis manus is a nerve of some size which 

 springs from the ulnar trunk about two and a half or three 

 inches above the wrist. It winds round the medial margin 

 of the forearm, under cover of the flexor carpi ulnaris, and 

 reaches the dorsum of the hand immediately below the 

 prominence formed by the distal end of the ulna. From 

 this point onwards it has been traced in the superficial dissec- 

 tion (p. 96). 



Nervus Medianus (Median Nerve). As its name implies, 

 the median nerve passes down the middle of the forearm ; 

 and to obtain an unbroken view of it, it is necessary to reflect 

 the humeral head of the pronator teres and the radial head 

 of the flexor digitorum sublimis. 



In the proximal part of the forearm the median nerve lies in 

 the fossa cubitalis upon the medial side of the ulnar artery. 

 It leaves this space by passing between the two heads of the 

 pronator teres, and as it does so it crosses the ulnar artery, 

 but is separated from the vessel by the ulnar head of the 

 muscle. From this point the median nerve runs distally 

 between the flexor sublimis and the flexor digitorum pro- 

 fundus. Near the wrist it becomes superficial, and lies 

 in the interval between the tendons of the flexor digitorum 

 sublimis on the medial and the flexor carpi radialis on the 



