THE SKELETON OF THE UPPER EXTREMITY 



115 



Head of the radius 



Capitulum radii 



Neck of the radius 



Collum radii 



Articular circumference 



Circumferentia articularis \ 



Articular circumference 



Circumferentia articularis 



Neck of the radius 



Collum radii 



Tuberosity of the radius 



Tuberositas radii 



Anterior border 



Margo volaris 



Nutrient foramen 



Foramen nutricium 



Internal or interos- 

 seous border 



Crista interossea 



Anterior surface 

 Facies volaris 



Posterior 

 surface 



Facies 

 dorsalis 



Posterior 

 border 



Margo 

 dorsalis 



External 

 surface 

 Facies 



lateralis 



Anterior surface 

 ' Facies volaris 



Posterior surface 



Facies dorsalis 



Internal or interosseous 



border 

 Crista interossea 





Styloid process 



Processus styloideus 



FIG. 262. ANTERIOR ASPECT. 



Styloid process 

 Processus sty- 

 loideus 



FIG. 263. POSTERIOR ASPECT. 

 THE RADIUS OF THE RIGHT SIDE. 



Sigmoid cavity, or 

 ulnar articular 

 surface 



Incisura ulnaris 

 Carpal articular 



surface 



Facies articularis 

 carpea 



FIG. 264. INTERNAL ASPECT. 



Olecranon 



Olecranon 



Great sigmoid cavity 



Incisura semilunaris ulnae 



Articular surface for the 

 capitellum of the humerus .. 

 Fovea capituli radii 



Articular circumference 



Circumferentia articularis 



FIG. 265. THE PROXIMAL EXTREMITIES 



OF THE BONES OF THE RlGHT FoRE- 

 ARM SEEN FROM ABOVE. 



Stytoid process of the 



radius 

 Processus styloideus 



radii 



Carpal articular surface 

 , Facies articularis carpea 



Styloid process of the ulna 

 Processus styloideus ulnae 



FIG. 266. THE DISTAL EXTREMITIES 

 OF THE BONES OF THE RlGHT 

 FOREARM SEEN FROM BELOW. 



Ossa antibrachii The bones of the forearm. 



152 



