THE SKELETON OF THE UPPER EXTREMITY 



121 



Articular facet for the second 

 metacarpal bone 



Groove for the tendon of the 

 flexor carpi radialis muscle 



Posterior surface 

 Saddle -shaped articular 

 facet for the metacar- 

 pal bone of the thumb 



Tuberosity or ridge 



'Tuberculum 



V, 



Articular facet for the 

 second metacarpal bone 



Articular facet for the 

 trapezoid bone 



Articular facet for the 

 scaphoid bone 



FIG. 288. DISTAL ASPECT. FIG. 289. ULNAR ASPECT. 



OS MULTANGULUM MAJUS THE RlGHT TRAPEZIUM. 



Articular facet for the OB 



magnum or capitate bone . 



Articular facet for the 

 scaphoid bone 



Radial articular facet for the 

 second metacarpal bone 



Ulnar articular facet for the 

 second metacarpal bone 



Posterior surface 



Articular facet for the 

 scaphoid bone 



Articular facet for trapezium 



FIG. 290. ULNAR ASPECT. FIG. 291. RADIAL ASPECT. 



Os MULTANGULUM MINUS THE RIGHT TRAPEZOID BONE. 



Head 



Caput 



Posterior surface 



Articular facet for the 

 trapezoid bone 



Anterior surface 



Articular facet for the 

 second metacarpal bone 



Articular facet for the 

 third metacarpal bone 



Head 



Caput 



Articular facet for the 

 unciform bone 



Articular facet for the third 

 metacarpal bone 



FIG. 292. RADIAL ASPECT. FIG. 293. ULNAR ASPECT. 



Os CAPITATUM THE RIGHT Os MAGNUM OR CAPITATE BONE. 



Posterior surface 



Articular facet for the fourth 



metacarpal bone 

 Articular facet for the fifth- 

 metacarpal bone 



Articular facet for the os magnum., 

 or capitate bone 



Unciform process 



Articular facet for the lunar 

 (or semilunar bone 



Articular facet for the pyra- 

 midal or cuneiform bone 



Unciform process 



FIG. 294. DISTAL ASPECT. FIG. 295. PROXIMAL ASPECT. 



Os HAMATUM THE RIGHT UNCIFORM BONE. 



Ossa- carpi The bones of the carpus: second, inferior, or distal row. 



16 



