THE RADIUS. 



291 



Head 



Tuberosity 



Fig. 304. 



Posterior border. 



Interosseous border- 



i^\V^ 



i 



Biceps 



Supinator brevii 



Ext. ossis met. pollicis— 



\ 



Ext. brevis pollicis- — 



— Pronator radii terei 



Sigmoid cavity 





"P'i > 



vj.m* 



>\ 



,Tubercle 



j Ext. OSS. met. poll. 

 \ Ext. brev. poll. 



-Ext. carp. rad. long, ethrcv. 



Styloid process 



Ext. com. dig. and 

 ext. indicts 



Ext. long. poll. 



Right radius from behind. The outline figure shows the areas of muscular attachment. 



