Horizontal plate of palatine bone
Encyclopedia
The horizontal part of the palatine bone
(horizontal plate) is quadrilateral, and has two surfaces and four borders.
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.
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 uvulæ.
The lateral border is united with the lower margin of the perpendicular part, and is grooved by the lower end of the pterygopalatine 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
.
Palatine bone
The palatine bone is a bone in many species of the animal kingdom, commonly termed the palatum .-Human anatomy:...
(horizontal plate) is quadrilateral, 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
Hard palate
The hard palate is a thin horizontal bony plate of the skull, located in the roof of the mouth. It spans the arch formed by the upper teeth.It is formed by the palatine process of the maxilla and horizontal plate of palatine bone....
. 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, and articulates with the palatine process of the maxilla.The posterior border is concave, free, and serves for the attachment of the soft palate
Soft palate
The soft palate is the soft tissue constituting the back of the roof of the mouth. The soft palate is distinguished from the hard palate at the front of the mouth in that it does not contain bone....
. 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 uvulæ.
The lateral border is united with the lower margin of the perpendicular part, and is grooved by the lower end of the pterygopalatine canal
Pterygopalatine canal
Pterygopalatine canal can refer to:* Greater palatine canal* Palatovaginal 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
Vomer
The vomer is one of the unpaired facial bones of the skull. It is located in the midsagittal line, and articulates with the sphenoid, the ethmoid, the left and right palatine bones, and the left and right maxillary bones.-Biology:...
.
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