The posterior nasal spine is part of the horizontal plate of the palatine bone of the skull.

It is paired with the corresponding palatine bone to form a solid spine.

The posterior nasal spine is the attachment of the uvula muscle.

The posterior nasal spine is an important cephalometric landmark.

[1] This article incorporates text in the public domain from page 167 of the 20th edition of Gray's Anatomy (1918) This human musculoskeletal system article is a stub.