The posterior nasal spine is part of the
horizontal plate
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 inf ...
of the
palatine bone
In anatomy, the palatine bones () are two irregular bones of the facial skeleton in many animal species, located above the uvula in the throat. Together with the maxillae, they comprise the hard palate. (''Palate'' is derived from the Latin ''pa ...
of the
skull
The skull is a bone protective cavity for the brain. The skull is composed of four types of bone i.e., cranial bones, facial bones, ear ossicles and hyoid bone. However two parts are more prominent: the cranium and the mandible. In humans, the ...
. It is found at the medial end of its posterior border. It is paired with the corresponding palatine bone to form a solid spine. It is the attachment of the
uvula muscle.
Structure
The posterior nasal spine is found at the medial end of the posterior border of the
horizontal plate
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 inf ...
of the
palatine bone
In anatomy, the palatine bones () are two irregular bones of the facial skeleton in many animal species, located above the uvula in the throat. Together with the maxillae, they comprise the hard palate. (''Palate'' is derived from the Latin ''pa ...
of the
skull
The skull is a bone protective cavity for the brain. The skull is composed of four types of bone i.e., cranial bones, facial bones, ear ossicles and hyoid bone. However two parts are more prominent: the cranium and the mandible. In humans, the ...
.
Function
The posterior nasal spine is the attachment of the
uvula muscle.
Society and culture
The posterior nasal spine is an important
cephalometric landmark.
Additional images
File:Gray187.png, Base of skull. Inferior surface.
See also
*
anterior nasal spine
The anterior nasal spine, or anterior nasal spine of maxilla, is a bony projection in the skull that serves as a cephalometric landmark. The anterior nasal spine is the projection formed by the fusion of the two maxillary bones at the intermaxill ...
References
External links
*
Bones of the head and neck
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