190 



Joints of the Upper Extremity. 



Tendo m. flexoris digitorum profundi 

 Tendo m. flexoris digitorum sublimis 



Os metacarpale II 



Ligamentum vaginale 



Ligamentum capitulorum 



transversum , 



M. lumbricalis II 



Os metacarpale V 



Ligamentum 

 accessorium volare 



Ligamentum 

 collaterale 



Ligamentum capitulorum 

 transversum 



Ligamentum vaginale 



Ligamentum vaginale 

 '' Teudo m. lumbricalis III (cut off) 

 M. interosseus volaris II 



241. Metacarpal bones and first phalanges of the 

 second to the fifth finger of the right hand with 



ligaments, from the volar surface. 



In the formation of the articulationes metacarpophalangeae the base of 

 each phalanx I moves upon the capitulum of the os metacarpale. A. tolerably loose 

 capsula articularis connects the margins of the surfaces covered with cartilage. 



Between the heads of the second of the fifth os metacarpale a flat powerful 

 ligamentum capitulorum [ossium metacarpalium] transversum (0. T. transverse meta- 

 carpal ligament) stretches out transversely over the distal end of the corresponding 

 spatium interosseum metacarpi on the volar surface. It is partially fastened to the 

 lateral surface of the capitulum; in part it goes over into the volar portion of the 

 joint capsule and there connects with the ligamentum accessorium volare; in part it 

 helps to form the ligamenta vaginalia for the flexor tendons of the fingers. The liga- 

 ment separates the distal portions of the mm. interossei from those of the mm. lumbri- 

 cales in that the former run dorsalward from it, the latter volarward. 



