. A treatise on practical anatomy: for students of anatomy and surgery . ticulates with the orbital plates of thefrontal anteriorly, and with the basilar process of the oc-cipital posteriorly. It also articulates with all the otlierbones of tlie cranium, binding them firmly and solidlytogether, and with five bones of the face,—the two malar,the two palate, and the vomer. It presents for exam- THE SPHENOID BONE. 27 illation a body, two greater wings, two lesser wings, andtwo pterygoid processes. When viewed from the frontit resembles a bat with wings extended. The body ishollow, cuboidal in for
. A treatise on practical anatomy: for students of anatomy and surgery . ticulates with the orbital plates of thefrontal anteriorly, and with the basilar process of the oc-cipital posteriorly. It also articulates with all the otlierbones of tlie cranium, binding them firmly and solidlytogether, and with five bones of the face,—the two malar,the two palate, and the vomer. It presents for exam- THE SPHENOID BONE. 27 illation a body, two greater wings, two lesser wings, andtwo pterygoid processes. When viewed from the frontit resembles a bat with wings extended. The body ishollow, cuboidal in form, and presents superior, in-ferior, anterior, and posterior surfaces. The greater andlesser wings spring from the sides of the body. Thesuperior surface from before backward presents the fol-lowing points: The ethmoidal spine for articulation withthe ethmoid; this is a smooth surface of bone, slightlygrooved on each side of the median line for the accom-modation of the olfactory tracts; anteriorly, it forms a MUdlt. CUitaidpraees .. • « Toramtn Optieu-. OvaU. YiQ. 11.—Sphenoid Bone, Upper Surface. spine which is received in an angle at the posterior por-tion of the ethmoid. This surface is continuous laterallywith the upper surface of the lesser wings. Behind theethmoid spine is the optic groove, which lodges the opticchiasm; it terminates at each side at the optic the optic groove is the olivary body, an ovoidalmass of bone which slightly overhangs a fossa posteriorto it, called the sella turcica, which lodges the pituitarybody. At the sides of this fossa, behind the olivary body,are the middle clinoid processes,—slight elevations whichgive attachment to the dura mater. Overhanging the 28 PRACTICAL ANATOMY. sella turcica posteriorly is a plate of bone which termi-nates at each side in well-marked processes,—the posteriorclinoid. This plate is notched at the sides for the passageof the sixth pair of nerves, and is also centrally notchedfor the acc
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanatomy, bookyear1891
