File:Anatomy, descriptive and surgical (electronic resource) (1860) (14578169937).jpg

Identifier: b20386424 (find matches)
Title: Anatomy, descriptive and surgical (electronic resource)
Year: 1860 (1860s)
Authors: Gray, Henry, 1825-1861 Carter, H. V., ill Westmacott, John Guise, Dr, ill
Subjects: Anatomy
Publisher: London : J.W. Parker
Contributing Library: Wellcome Library
Digitizing Sponsor: Wellcome Library

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t vessels to the substance of the bone. It is bounded in front by two smalleminences, one on either side, called the middle clinoid processes (/cXtV^y, a bed),and behind by a square-shaped plate of bone, terminating at each superior anglein a tubercle, the posterior clinoid processes, the size and form of which varyconsiderably in different individuals. These processes deepen the pituitary fossa,and serve for the attachment of prolongations from the tentorium. The sides ofthe plate of bone supporting the posterior clinoid processes are notched, for thepassage of the sixth pair of nerves; and behind, it presents a shallow depression,which slopes obliquely backwards, and is continuous with the basilar groove ofthe occipital bone; it supports the medulla oblongata. On either side of the bodyis a broad groove, curved somewhat like the italic letter /; it lodges the internalcarotid artery and the cavernous sinus, and is called the cavernous groove. The 35._Splienoid Bone, Anterior Surface.
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posterior surface, quadrilateral in form, articulates with the basilar process of theoccipital bone. During childhood, a separation between these bones exists bymeans of a layer of cartilage; but in after-life this becomes ossified, ossificationcommencing above, and extending downward, and the two bones are then im-moveably connected together. The anterior surface (fig. 35) presents, in themiddle line, a vertical lamella of bone, which articulates in front with the per-pendicular plate of the ethmoid, forming part of the septum of the nose. Oneither side of it are the irregular openings leading into the sphenoidal sinuses.These are two large irregular cavities, hollowed out of the interior of the bodyof the sphenoid bone, and separated from one another by a more or less completeperpendicular bony septum. Their form and size vary considerably, they areseldom symmetrical, and are often partially subdivided by irregular osseouslaminse. Occasionally they extend into the basilar process of

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