. Cunningham's Text-book of anatomy. Anatomy. THE CAKPUS. 221 Os hamatum Pisiform dorsally, is directed distally and towards the medial side articulates with four bonesâthe greater multangular, navicular, and capitate bones, and the second metacarpal. Capitate Bone ( Os Magnum). âThis is the largest of the carpal bones. Its volar surface is rough and rounded. The proximal portion of the bone forms the head, and is furnished with convex articular facets which fit into the hollows on the medial surface of the navicular and distal surface of the os lunatum; that for the latter is medial to an
. Cunningham's Text-book of anatomy. Anatomy. THE CAKPUS. 221 Os hamatum Pisiform dorsally, is directed distally and towards the medial side articulates with four bonesâthe greater multangular, navicular, and capitate bones, and the second metacarpal. Capitate Bone ( Os Magnum). âThis is the largest of the carpal bones. Its volar surface is rough and rounded. The proximal portion of the bone forms the head, and is furnished with convex articular facets which fit into the hollows on the medial surface of the navicular and distal surface of the os lunatum; that for the latter is medial to and separated by a slight ridge from the navicular artic- ular area. The distal surface, narrow to- wards its volar border and broad dorsally, is subdivided usually into three facets by two ridgesâthat towards the lateral side is for the base of the second metacarpal; the inter- na e d i a t e facet is for the third metacarpal; whilst the medial facet of the three, The lesser multangular Os lunatum. Articular disc of wrist Note. Fig. Fig. 215.âThe Right Os Tbiquetrtjm. -The. bone is represented in the centre of the figure in the position which it occupies in the right hand viewed from the volar aspect. The views on either side, and above and below, represent respectively the corresponding surfaces of the bone turned towards the reader. Os triquetrum -The Right Pisiform Bone. Note.âThe figure to the left repre- not always present, very small and placed near the dorsal sents the volar aspect of the side of the bone is for th f th metacarpal. The lateral bone: that to the right the ⢠->«.<â <⢠.. _ r _ bone; that to the right the dorsal view. side of the body has an articular surface for the small multangular, not infrequently separated from the navic- ular surface on the head by a rough line, to which the interosseous ligament connecting it with the navicular is at- tached. The medial side of the body has an elongated articular surface, usu- ally de
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