IO2 



Anatomy of Skeleton 



(1) Scaphoid has one side contact, with the semilunar. But it articulates with 

 three bones below, trapezium, trapezoid, and os magnum ; above, with the radius. 



(2) Semilunar : two side facets, for scaphoid and cuneiform : below, with os 

 magnum and a small area of unciform : above, with radius and a small area of fibro- 

 cartilage. 



concavf 



oval. 



iicet 



FIG. 82. Semi-schematic outlines of bones of hand from the front. Description in 

 text. Observe that the carpal and metacarpal bones are riumbered from without 

 inwards while the phalanges are numbered from above downwards. The smaller 

 figure shows the distinctive features of the different phalanges. 



(3) Cuneiform : with semilunar and pisiform, the latter really being in front of it, 

 in conformity with the formation of the anterior concavity of the carpus : below, with 

 unciform : above, with the triangular fibro-cartilage of the wrist. 



(4) Pisiform : a very small bone, only articulating with the cuneiform. 



The articulations of the distal row are with their neighbours, with the proximal 

 row above, and with the elements of the metacarpus below. 



