SHOULDER, ARM, FOREARM, AND HAND. 



177 



The pronator radii teres muscle must first be separated from the flexor carpi 

 radialis, by dividing the connective tissue with scissors and forceps. Next pull 

 the brachio-radialis outward, and expose the insertion of the pronator radii teres 

 into the middle third of the outer surface of the radial shaft. Now trace the 



Biceps 

 Triceps 



Muscles of first layer 

 Brachialis anticus 



Flexor sublimis digitorum L~ 



Flexor carpi ulnaris 



Plexor carpi radialis 

 Falmaris longus 



Brachio-radialis 



Extensor carpi radialis iongior 



Supinator brevis 



Brachio-radialia 

 Flexor longus pollicis 



Extensor ossis metacarpi pollicis 

 Extensor brevis pollicis 



FIG. 122. FRONT OF THE FOREARM: SECOND LAYER OF MUSCLES. 



median nerve down, and see it pass between the two heads of the pronator radii 



teres, to reach the under surface of the flexor sublimis digitorum. (Fig. 119.) 



The ulnar artery's course (Fig. 117) to reach its groove as described on 



page 172 ; Cut the origins at the internal condyle, of the pronator radii teres, 



