102 



Articulations of the Hand. 



Art. radio 

 ulnaris itiferiv 



Art. oss is pisif. 



Art. brack io- 

 carpea 



Liy.cajpsul. 



inffrcarpea. 



142. The Rio-lit Carpal- and Metaearpal Articu- 

 lations, in section. 



The articulations around the wrist arc: 



1. the Articulatio radio-ulnaris Inferior between the head of the ulna, 

 sigmoid cavity of the radius and upper surface of the Cartihujo intcr- 

 artlcularis (pronation - - stipulation) ; 



2. the Articulatio liracltio-carpt'a .STH Articulatio carpi ( wrist joint) bet- 

 ween the lower end of the radius and under surface of the interarticular 

 cartilage above, and the superior surface of the scaphoid, semilunar 

 and cuneiform bones below (flexion extension, abduction adduction 

 of the hand) ; 



3. the Articulatio intcrcarpea between the upper and lower rows of 

 carpal bones (slight flexion and extension) ; 



4- the Articulatio o.ssw pisiformis, isolated ; 



5. the Articulatio carpo - mctacarpea of the four internal metacarpal 

 bones with the lower row of carpal bones (tense ligaments, very slight 

 movement in every direction) ; 



G. the Articulatio carpo-mctacarpza polUcis, isolated (flexion exten- 

 sion, ab- and adduction and circumdnction). 



