EXTREMITIES. 23 



extending to lower part of inferior inter-carpal joint. 

 Limited gliding. 



Upper inter-carpal Joint. — Arthrodia. Facettes 

 of lateral faces of the bones of the first row. Six 

 ligaments : three anterior, and three interosseous. 



Lower inter-carpal joint. — Arthrodia. Facettes 

 of lateral faces of the bones of the second row. Four 

 ligaments: two anterior, and two interosseous. For 

 both of these joints, more or less gliding motion. 



Ligaments common to all joints, four : one anterior 

 capsular ; one posteiior capsular ; one external and 

 one internal funicular. Motions common to all the 

 carpal joints : flexion, extension, abduction, adduction, 

 and circumduction. 



Metacarpo-phalangeal joint. — Perfect hinge. On 

 metacarpus, two condyles, and antero-posterior emi- 

 nence ; on lower surface, two glenoid cavities, separated 

 by median groove on os suffraginis, extended on the 

 anterior face of the large sesamoids. Six ligaments 

 for the bones of tlic lower surface ; three inferior sesa- 

 moids ; one interosseous sesamoid, two lateral. Four 

 ligaments for the metacarpus, with the bones of the 

 lower surface ; one anterior capsular ; one posterior, 

 superior sesamoid or suspensory ; two laterals. One 

 synovial capsula. Flexion and extension. 



First inter-phalangeal joint. — Imperfect hinge. 



