. The anatomy of the domestic animals. Veterinary anatomy. THE METATARSUS 123 articulation with the fourth tarsal. In some cases there is a facet for the medial small metatarsal bone. The Fourth Tarsal Bone The fourth tarsal bone (Os tarsale quartum)' is the lateral bone of the distal row, and is equal in height to the central and third together. It is culioid in shape and presents six surfaces. The proximal surface is convex from side to side, and articulates chiefly with the fibular tarsal, but to a small extent with the tibial tarsal also. The distal surface rests on the large and lateral s
. The anatomy of the domestic animals. Veterinary anatomy. THE METATARSUS 123 articulation with the fourth tarsal. In some cases there is a facet for the medial small metatarsal bone. The Fourth Tarsal Bone The fourth tarsal bone (Os tarsale quartum)' is the lateral bone of the distal row, and is equal in height to the central and third together. It is culioid in shape and presents six surfaces. The proximal surface is convex from side to side, and articulates chiefly with the fibular tarsal, but to a small extent with the tibial tarsal also. The distal surface rests on the large and lateral small metatarsal bones. The medial surface bears four facets for articulation with the central and third tarsal bones. It is crossed from before back- wartl by a smooth groove, which by apposition with the adjacent bones forms the canal of the tarsus (Can- alis tarsi) for the passage of the perforating tarsal vessels. The dorsal, lateral, and plantar surfaces are continuous and rough. A tuberosity Ijehind gives attachment to the plantar ligament. Development.—The fibular tarsal bone has two centers of ossification, one for the main mass and the other for the tuber calcis; the latter fuses with the rest of the bone at about three years of age. The first and second tarsals have separate centers, but fusion usu- ally occurs before birth. Each of the other bones ossifies from a single THE METATARSUS The metatarsal bones (Ossa metatarsalia), three in number, have the same general arrangement as. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Sisson, Septimus, 1865-1924. Philadelphia, London, W. B. Saunders Company
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