?500 



THE MUSCLES 



sixth cervical nerve), by branches from the musculo-spiral nerve which enter the 

 wmn^v part of the muscle upon its inner surface. 



Action.— To Hex the forearm. Its insertion at the lower end of the long arm 



FiCr. 276.— Muscles of the Radial Side and the Back of the Fokeaem. 



Biceps 



Brachialis amicus 



Brachio-radialis 



Extensor carpi radialis longior 



Extensor communis digltorum 



Extensor carpi radialis brevior 



Extensor ossis metaoarpi pollicis 



Extensor brevis pollicis 



Extensor longus pollicis 



t — Triceps 



Flexor carpi ulnaris 



Extensor carpi ulnaris 



Extensor minimi digiti 



formed l)y the radius makes it one of the few examples of the second order of lever 

 when the muscle is used to raise only the weight of the forearm; but whatever 

 advantage is obtained by the position of this insertion is lost by the extreme 



