138 



ARTHKOLOGY. 



trapezial, is covered by the external lateral ligament. The 

 interossei are attached to the roughened grooves between the 

 articular facets on the lateral surfaces of the scaphoid, lunar, and 

 cuneiform bones. The two inner are blended with the anterior, 

 while the external one is covered by the posterior common 

 ligament. 



Inferior Carpal. The bones of the lower row are held 

 together by four ligaments, two anterior and two interos- 

 seous. The anterior are covered, the internal one by the 

 internal lateral, the other by the capsular ligament. The 

 interossei are two ; the one joining the mag- 

 num to the trapezoid is blended with the 

 anterior ligament, but the other is separated 

 from the corresponding anterior one by an 

 articular facet. 



Radio-Carpal. The special ligaments join- 

 ing the radius to the upper row are three in 

 number. The oblique one stretching obliquely 

 from the lower extremity of the radius, under 

 the posterior common ligament, to the scaphoid 

 bone. A second small one, the superior tra- 

 pezial, stretches from the external side of the 

 inferior extremity of the radius to the superior 

 border of the trapezium, partly covered by 

 the external lateral ligament. A third, the 

 smallest of all, is buried under the former, 

 and stretches from the inferior part of the 

 radius to the os lunare. 



Intercarpal. There are three special liga- 

 ments ; two are short, and situated under the 

 posterior common ligament. The first runs vertically from the 

 scaphoid to the magnum and trapezoid, the second passes obliquely 

 from the cuneiform to the magnum ; while the third, the inferior 

 trapezial, by far the strongest, stretches from the trapezium to 

 the unciform and head of the external splint bone, blending 

 externally with the lateral, internally with the posterior common 

 ligaments. 



Carpo-metacarpal. This joint has the following special 

 ligaments : two anterior, two posterior, and two interosseous. 

 The jirst anterior consists of two bundles uniting the os 

 magnum to the large metacarpal bone. The second anterior 



FIG. 53. 



Deep ligaments of the 

 carpus external view. 

 and b, Deep portions 

 of the external lateral 

 ligament ; c, Superior, d, 

 Median, an<l e, Inferior 

 trapezial ligaments. 



