. Anatomy, descriptive and applied. Anatomy. 94 SPECIAL ANATOMY OF THE SKELETON wing is serrated for articulation with the frontal bone; the posterior border, smooth and rounded, is received into the sylvian fissure of the cerebrum. The inner extremity of this border forms the anterior clinoid process {processus dinoideus anterior). The lesser wing is connected to the side of the body by two roots, the upper thin and flat, the lower thicker, obliquely directed, and presenting on its outer side, near its junction with the body, a small tubercle, for the attachment of the common tendon of origin
. Anatomy, descriptive and applied. Anatomy. 94 SPECIAL ANATOMY OF THE SKELETON wing is serrated for articulation with the frontal bone; the posterior border, smooth and rounded, is received into the sylvian fissure of the cerebrum. The inner extremity of this border forms the anterior clinoid process {processus dinoideus anterior). The lesser wing is connected to the side of the body by two roots, the upper thin and flat, the lower thicker, obliquely directed, and presenting on its outer side, near its junction with the body, a small tubercle, for the attachment of the common tendon of origin of three of the Extrinsic muscles of the eye. Be- tween the two roots is the optic foramen, for the transmission of the optic nerve and ophthalmic artery. The Pterygoid Processes {-processus pterygoidei).—^The pterygoid processes, one on each side, descend perpendicularly from the place where the body and greater wing unite (Fig. 59). Each process consists of an external and an in- ternal plate, which are joined together by their anterior borders above, but are separated below, leaving an angular cleft, the pterygoid notch, in which the pterygoid tuberosity of the palate bone is received. The two plates diverge from each other from their line of connection in front, so as to form in conjunc- tion with the tuberosity of the palate bone a V-shaped fossa, the pterygoid fossa. The external pterygoid plate {laviina lateralis processus pterygoidei) is broad and. Fig. 59.—Sphenoid bone. Posterior surface. thin, turned a little outward, and, by its outer surface, forms part of the inner wall of the zygomatic fossa, giving attachment to the External pterygoid; its inner sur- face forms part of the pterygoid fossa, and gives attachment to the Internal pterygoid. The posterior border of this plate frequently has one or more rough projections, to one of which is attached the pterygospinous ligament, when this is present. The internal pterygoid plate {lamina medialis processus pterygoi
Size: 1911px × 1308px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1913
