DISSECTION OF THE UPPER EXTREMITY 



113 



(bbc) Volar intercarpal ligaments (Ligg. intercarpea vo- 



laria) (0. T. palmar intercarpal). 



(bbd) Interosseous intercarpal ligaments (Ligg. intercar- 



pea interossea). 



To examine these ligaments carefully the ulnar and radial collateral 

 ligaments of the carpus and the dorsal intercarpal ligaments should be 

 cut through. 



In this connection study also the articulation of the pisiform 

 bone (articulatio ossis pisiformis), examining the following: 



FIG. 45. 



Art. raclio-ulnaris distalis 



Radiocarpal interspace 

 Intercarpal interspace 





Discus articularis 



Os triquetrum 



Carpometacarpal - J*i&t^ii8!a$i;!^ _ _ Lig. carpometacarpale 



interspace ^^ilJ^w^d^J/M/v! ^** *\^^^^ .min. , il interosseum 



Lig. basis ( os. meta- 

 carp.) interosseum 



Frontal section of the radiocarpal, carpal, and carpometacarpal joints. (From Poirier et Charpy, 

 Trait6 d'Anat. hum., Paris, 1899, 2 ed., t. i. p. 660, Fig. 667.) 



(a) Joint-capsule (capsula articularis}. 



(b) Strengthening ligaments: 



(ba) Ligamentum pisohamatum. 



(bb) Ligamentum pisometacarpeum. 



How are these related to the tendon of the M. flexor carpi ulnaris, 

 and of what importance are they? 



Of what movements is the hand capable at the radiocarpal 

 articulation? In how far are these movements favored or in- 

 creased by means of the intercarpal articulation? What muscles 



8 



