. Cunningham's Text-book of anatomy. Anatomy. THE CAEPUS. 219 OS CAPITATCM OS LUNATUM Navicular Lessee multangular ,-^j Greater multangular OS TRIQUETRUM OS HAMATUM hollowed from before backwards, is divided into two articular areas, of which the lateral is the larger; this is for the head of the capitate bone; the medial, narrow from side to side, articulates with the os hamatum. Its lateral surface, crescentic in shape, serves for articulation with the navicular, and also for the attachment of the interosseous ligaments which connect it with that bone. Its medial surface, of quadrilateral fo
. Cunningham's Text-book of anatomy. Anatomy. THE CAEPUS. 219 OS CAPITATCM OS LUNATUM Navicular Lessee multangular ,-^j Greater multangular OS TRIQUETRUM OS HAMATUM hollowed from before backwards, is divided into two articular areas, of which the lateral is the larger; this is for the head of the capitate bone; the medial, narrow from side to side, articulates with the os hamatum. Its lateral surface, crescentic in shape, serves for articulation with the navicular, and also for the attachment of the interosseous ligaments which connect it with that bone. Its medial surface, of quadrilateral form, is cartilage-covered for articulation with the os triquetrum, and the edge which separates this from the proximal surface has attached to it the interosseous ligament which unites these two bones. The rough dorsal non-articular surface is much smaller than the volar; by this means the volar and dorsal sur- faces of the bone can readily be determined. The os lunatum articulates with five bones—the navicular, the radius, the os triquetrum, the os hamatum, and the capitate bone. Os Triquetrum (0. T. Cunei- form). — This bone may be recognised by the small oval or circular facet on its volar surface for the pisiform. This is placed towards the distal part of the volar surface, which is elsewhere rough for liga- ments. The bone is placed obliquely, so that its surfaces cannot be accurately described as distal, proximal, etc.; but for convenience of description, the method already adopted is ad- hered to. The proximal surface has a convex rhombic surface for articulation with the distal surface of the articular disc in adduction of the hand, though ordinarily it does not appear to be in contact with that structure. To the medial side of this it is rough for liga- ments. The distal surface is elongated and concavo-convex from radial to ulnar side; here the bone articulates with the os hamatum. The lateral surface, broader in front than behind, articulates with the os lunatum.
Size: 1207px × 2070px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1914
