. Cunningham's Text-book of anatomy. Anatomy. Pterygo- palatine fossa Sphenoidal process ^g^; Spheno-palatine notch For medial pteiygoid lamina Pterygoid f For lateral pterygoid lamina" Pyramidal - process Surface for attach. Surface Pterygopalatine sulcus of pterygoideus for maxilla internus Orbital process Orbital surface Ethmoid Sphenoid Crista ethmoidalis Spheno-palatine notch. Inferior meatus Pterygoid fossa, Pyramidal P^ process Posterior For medial nasal spine pterygoid lamina A Fig. 160.—Eight Palate Bone. A, As seen from the Lateral Side ; B, As viewed from the Medial Side. The p
. Cunningham's Text-book of anatomy. Anatomy. Pterygo- palatine fossa Sphenoidal process ^g^; Spheno-palatine notch For medial pteiygoid lamina Pterygoid f For lateral pterygoid lamina" Pyramidal - process Surface for attach. Surface Pterygopalatine sulcus of pterygoideus for maxilla internus Orbital process Orbital surface Ethmoid Sphenoid Crista ethmoidalis Spheno-palatine notch. Inferior meatus Pterygoid fossa, Pyramidal P^ process Posterior For medial nasal spine pterygoid lamina A Fig. 160.—Eight Palate Bone. A, As seen from the Lateral Side ; B, As viewed from the Medial Side. The pars perpendicularis (perpendicular part) is very much broader below than above. Composed of thin bone, particularly at its superior part, it is liable to be broken in the process of disarticulation, so that it is somewhat uncommon to meet with a perfect specimen. It may be described as possessing two surfaces and four borders. Its medial surface, which is directed towards the cavity of the nose, is crossed horizontally, about its middle, by the crista conchalis (concbal crest) with which the posterior end of the superior border of the inferior conchal bone articulates; above and below this, it enters into the formation of the lateral wall of the middle and inferior meatuses of the nose, respectively. Near the superior extremity of the perpendicular part, and below the processes which spring from it, there is another ridge more or less parallel to that already described. This is the crista ethmoidalis (ethmoidal crest), and with this the posterior extremity of the middle concha articulates. The lateral surface, which forms the medial wall of the pterygo- palatine fossa, is channelled by a vertical groove (sulcus pterygopalatine), converted into the ptery go-palatine canal by articulation with the maxilla. This canal, called at its lower end the larger palatine foramen, transmits the posterior palatine nerve and greater palatine vessels. Anteriorly the lateral surface projects
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1914
