Volume 180501

Anatomia Britannica; a system of anatomy and physiology, selected from the works of Haller, Albinus, Monro, etc.

Date:
1805
Catalogue details

Licence: Public Domain Mark

Credit: Anatomia Britannica; a system of anatomy and physiology, selected from the works of Haller, Albinus, Monro, etc. Source: Wellcome Collection.

    190/370 (page 168)
    face, where itis joined to the os cuboides. The forepart of this bone is all covered with cartilage, and is divided into three smooth planes, fitted to the three ossa cuneiformia. — The os naviculare and astragalus are joined as a ball and socket ; and the naviculare moves in all directions in turning the toes inward, or in raising or depressing either side of the foot, though the motions are greatly restrained by the ligaments which connect this to the other bones of the tarsus. The os naviculare is wholly cartilaginous in a new-born i ins 3 fant. Os culoides isa very irregular cube. an oblong unequal concavity, adapted to the forepart of the os calcis. On its internal side, there is a small semicireular smooth | cavity, to join the os naviculare. Immediately before which, an : oblong smooth plane is made by the os cuneiforme externum. Below this the bone is hollow and rough. On the internal side . of the lower surface, a round protuberance and fossa are found, where the musculus adductor pollicis has its origin. On the ex- ternal side of this same surface, there is a round knob, covered with cartilage ; immediately before which a smooth fossa may bes] observed, in which the tendon of the peronzus primus runs ob- liquely cross the foot; and on the knob the thin flat cartilage proper to this muscle abe &, ; in place of which sometimes a bone is found. More externally than the knob, a rough hollow is made, for the strong ligaments stretched betwixt this bone and ’ the os calcis. Before, the surface of the os cuboides is flat, smooth, and slightly divided into two planes, for sustaining the os metatarsi of the little toe, and of the toe next to it. ~ 7 The form of the back part of the os cuboides, and the liga— ments connecting the joint there with the os calcis, both concut in allowing little motion in this ‘part. The ossification of this bone is scarcely begun at the birth. Os cuneiforme externum, if we regard its situation or medium > by its bulk, is much of the shape of a wedge, being broad and flat above, with long sides running obliquely downward, and terminating in a sharp edge. The upper surface of this bone is - an oblong square. The one behind is nearly,a triangle, but not complete at the inferior angle, and is joined to the og naviculare. Behind, it is formed into : ~~