298 A MANUAL OF ANATOMY. 



The dorsal cutaneous branch of the ulnar nerve is 

 found about two inches above the wrist ; it turns backward 

 under the tendon of the flexor carpi ulnaris muscle to the 

 back of the hand, where it will be found. 



The Median Nerve. Fig. 67. 



At the elbow the median nerve lies at the inner side of 

 the brachial artery. It descends between the two heads of 

 the pronator radii teres, then directly down the centre of 

 the forearm between the flexor sublimis and flexor profun- 

 dus digitorum muscles to enter the hand through the cen- 

 tral compartment of the anterior annular ligament with the 

 tendons of the above muscles. 



It supplies directly the pronator radii teres, flexor carpi 

 radialis, palmaris longus, flexor sublimis digitorum, and 

 through the anterior interosseous branch the flexor longus 

 pollicis, the outer portion of the flexor profundus digitorum, 

 and the pronator quadratus. 



The Palmar Cutaneous branches of the median and ulnar 



nerves. 



These small nerves should be looked for just above the 

 wrist, while removing the superficial fascia from the fore- 

 arm ; the median branch is in the middle and the ulnar 

 along the inside of the wrist. 



Flexor Longus Pollicis. Fig. 67. 



Origin. From the anterior surface of the radius be- 

 tween the oblique line above and the pronator quadratus 

 below, also (often) by a slender head from the inner side of 

 the coronoid process of the ulna, and from the outer part 

 of the interosseous membrane. 



Insertion. Into the palmar surface of the base of the 

 last phalanx of the thumb. 



