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Horizontal plate of palatine bone

Part of the facial skeleton

Field	Value
Name	Horizontal plate of palatine bone
Latin	pars horizontalis
Image	Gray168.png
Caption	Left palatine bone. Nasal aspect. Enlarged.
Image2	Gray169.png
Caption2	Left palatine bone. Posterior aspect. Enlarged.

The horizontal plate of palatine bone is a quadrilateral part of the palatine bone, and has two surfaces and four borders.

Surfaces

The superior surface, concave from side to side, forms the back part of the floor of the nasal cavity.

The inferior surface, slightly concave and rough, forms, with the corresponding surface of the opposite bone, the posterior fourth of the hard palate. Near its posterior margin may be seen a more or less marked transverse ridge for the attachment of part of the aponeurosis of the tensor veli palatini.

Borders

The anterior border is serrated. It articulates with the palatine process of maxilla.

The posterior border is concave, free, and serves for the attachment of the soft palate. Its medial end is sharp and pointed, and, when united with that of the opposite bone, forms a projecting process, the posterior nasal spine for the attachment of the musculus uvulae.

The lateral border is united with the lower margin of the perpendicular plate, and is grooved by the lower end of the greater palatine canal.

The medial border, the thickest, is serrated for articulation with its fellow of the opposite side; its superior edge is raised into a ridge, which, united with the ridge of the opposite bone, forms the nasal crest for articulation with the posterior part of the lower edge of the vomer.

Additional images

File:Gray187.png|Base of skull. Inferior surface. File:Gray196.png|Roof, floor, and lateral wall of left nasal cavity. File:Gray996.png|Permanent teeth of upper dental arch, seen from below. File:Horizontal plate.jpg|Horizontal plate

References

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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