ARTHROLOGY. 43 



R.A.DIO-CARPAL. 



Lower articular surface of radius with four upper carpal bones. 



Ligaments. 



Internal, from radius to fourth bone. 

 Superficial external, radius to supercarpal bone. 

 Deep external, radius to second bone and interosseous ligament. 

 Action. 



Imperfect ginglymus. 



CARPUS. 



Fij'st row with each other. 



Three anterior and three interosseous running in front of and 

 between bones. 



Second row with each other. 



Two anterior and two interosseous. 



First and second 7'ows with each other. 



Ligaments. 



External posterior, from first of upper to second bone of lower 

 row. 



Internal posterior, from internal bone of upper row to second 

 and third of metacarpal row. 



External, from supercarpal to first bone of second row and 

 head of external metacarpal. 

 Action. 



Imperfect ginglymus. 



CARPO- METACARPAL. 



Between three lower carpus and three metacarpus, forming a 

 planiform diarthrosis. 



Ligaments. 



Two anterior, one between second bone and principal meta- 

 carpal ; the other from the first to external metacarpal. 



Two interosseus, from articulations between metacarpus to in- 

 terosseous ligaments of second row. 



COMMON CARPAL LIGAMENTS. 



1. Anterior, from radius to principal metacarpal. 



2. Posterior, posterior part of radial surface to carpus and 

 principal metacarpal. 



