122 



THE SKELETON OF THE UPPER EXTREMITY 



Articular facet for the trapezium 



Articular facets for the third metacarpal bone Articular facet for the 



second metacarpal bone 



Articular facet for the fourth 

 metacarpal bone 



Fifth metacarpal bone 

 Os metacarpale V. 



Depressions for the attach- 

 ment of the lateral 

 ligaments 



-'' ) Base, or carpal extremity 

 J Basis 



Saddle-shaped articular facet 

 for the trapezium 



Shaft, or body 



Corpus 



Metacarpal bone of the 

 thumb 



Os metacarpale pollicis 



\_Head, or phalangeal extremity 

 Capitulum 



IV Xsa^g^ >^fV 



III II 



FIG. 296. RADIAL ASPECT OF THE FIVE METACARPAL BONES OF THE RIGHT HAND. 



Articular facets for the fourth metacarpal bone 



Articular facet for the os magnum . 

 or capitate bone 



Articular facet for the third 



metacarpal bone 



Saddle-shaped articular 

 facet for the trapezium 



Metacarpal bone of the 



thumb 

 Os metacarpale pollicis 



Styloid process of the third metacarpal bone 



Processus styloicteus 

 f\ Base, or carpal extremity 



/ Articular facet for the ,'/ Basis 

 ' \ : fifth metacarpal bone -''' / 



Tuberosity of the fifth 

 metacarpal bone 



Tuberositas ossis 

 metacarpalis V. 



Shaft, or body 



Corpus 



Depressions for the attach- 

 ment of the lateral 

 ligaments 



Head, or phalangeal extremity 

 Capitulum 



V 



FIG. 297. ULNAR ASPECT OF THE FIVE METACARPAL BONES OF THE RIGHT HAND. 



Trochlea 



Proximal extremity Shaft> or body 



\ / Cor P us ! ^ ^ 



'*&, 



'T ochlea 



Posterior surface extremity H ead, or phalangeal 

 . Fades dorsalis /fasis extremity, of the 



metacarpal bone 



Capitulum ossis 

 metacarpalis 



Ungual process 



Tuberositas 

 unguicularis 



FIG. 298. RADIAL ASPECT OF THE BONES OF THE RIGHT INDEX FINGER (MARGO RADIALIS 



DIGITI SECUNDI). 



The Metacarpal Bones of the Hand and the Phalanges of the Fingers. 



