Artistic anatomy of animals / Édouard Cuyer ; translated & edited by George Haywood.

  • Cuyer, Édouard, 1852-
Date:
1905
Catalogue details

Licence: In copyright

Credit: Artistic anatomy of animals / Édouard Cuyer ; translated & edited by George Haywood. Source: Wellcome Collection.

    93/346 (page 67)
    These tuberosities are visible under the skin which covers the superior and lateral parts of the region known as the knee ; but which, we again repeat, is no other than the wrist. The ulna has a triangular shaft, situated at the posterior surface of the radius, with which it is fused. It disappears completely at the level of the inferior third of the forearm. Occasionally, in some horses, the ulna is abnormally long, in the form of a slender tongue of bone ; and extends to the neighbourhood of the external tuberosity of the inferior extremity of the radius (see Fig. 79, p. 196). Its superior extremity is chiefly represented by the olecranon process, which is voluminous in bulk, and forms the projection known as the point of the elbow. This process is flattened laterally ; its internal surface is excavated ; the anterior surface, which is concave, forms a part of the great sigmoid cavity ; the remainder of the cavity is formed by the radius. In the ass, the ulna is a little longer than in the horse— that is to say, it descends lower ; and the radius is a little more convex anteriorly. The carpal bones are seven in number—four in the superior row, and three in the inferior. The trapezium is wanting in the latter. Sometimes, however, in certain varieties of horses the trapezium is developed, but then it is no more than a very small osseous nodule. The pisiform bone, situated at the external part of the first row of bone, is prominent pos- teriorly. It is of rounder form and flattened from without inwards. It articulates with the trapezium and the radius. It presents, on its external surface, a groove for the passage of the tendon of the posterior ulnar muscle, which is named by veterinary anatomists the external flexor of the metacarpus. The carpus, as a whole, is of an irregularly cuboid shape ; its anterior surface, slightly convex from side to side, forms the skeleton of the region of the knee (wrist). The meta- carpus is formed of three bones : the principal metacarpal and the two rudimentary ones. The principal metacarpal, which forms the region of the canon, is directed vertically ; its anterior surface is slightly convex transversely. This surface is covered by a number 5-2