DISSECTION OF THE UPPER EXTREMITY 



111 



Study the possible movements of the humeroradial and 

 humero-ulnar articulations. 



Joint of the Hand (Articulatio manus). 



Dissect away the whole of the ligamentum carpi transversum 

 and the ligamentum carpi dorsale. Reflect the flexor and ex- 

 tensor tendons distalward, so as to leave the region of the wrist 

 bare. Cut away the short muscles of the thenar and hypothenar 

 eminences. 



FIG. 43. 



Labrum ,, 

 falciforme" 



Articulatio cubiti, frontal section. (From Poirier et Charpy, Traite d'Anat. hum., Paris, 1899, 2 ed., t. L 



p. 644, Fig. 653.) 



Note that the joint of the hand is divisible into two chief 

 parts : 



(a) Radiocarpal articulation (articulatio radiocarpea) (0. T. wrist- 



joint). 



(b) Intercarpal articulation (articulatio intercarpea) (0. T. carpal 



joints). 



ad (a) What bony articular surfaces are concerned in the radiocarpal articu- 

 lation? Study carefully the following: 



(aa) Joint-capsule (capsula articularis) . 



(ab) Strengthening ligaments: 



(aba) Dorsal radiocarpal ligament (ligamentum radiocar- 



peum dorsale) (0. T. posterior ligament). 



(abb) Volar radiocarpal ligament (ligamentum radiocar- 



peum volare) (0. T. anterior ligament). 



(abc) Ulnar collateral ligament of carpus (ligamentum 



