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Ossa palatina

The palatine bone isn't particularly complex. The main issue with this bone for students when they first see this bone is its proper spatial orientation and topography. The palatine bones borders lateral and inferior walls of choanae (like L & .(L

The vertical laminae are continuous into the pterygoid process of the sphenoid bone, and the horizontal lamina is continuous ventrally into the palatine process of the maxilla.

Download JPG image — Palatine bones ex situ & in situ.
Superior and slightly anterior view. Superior and slightly anterior view. To better visualize palatine bones, the rest of viscerocranium is displaced separately.

Download JPG image — The palatine bones ex situ & in situ. Inferior view.
Palatine bones are the most dorsal bones of the viscerocranium, acting as the bridge between processus pterygoideus & corpus ossis sphenoidalis from one side and maxilla from the other.

Download JPG image — The palatine bones ex situ & in situ. Iso view.
Two L-shaped palatine bones form the dorsal part of the nasal cavity.

Anterior aspect of palatine bones with the anatomy terminology markup — The anterior aspect of palatine bones.
Please note that both bones are in contact with each other, and the distance between two lamina horizontalis practically doesn't exist.

The list of terms:
Lamina perpendicularis – Perpendicular plate
Lamina horizontalis – Horizontal plate
Processus orbitalis – Orbital process
Incisura sphenopalatina – Sphenopalatine notch
Processus sphenoidalis – Sphenoidal process

Posterior view of palatine bones with the anatomy terminology markup — The posterior aspect of palatine bones.

The list of terms:
Crista ethmoidalis – Ethmoidal crest
Crista conchalis – Conchal crest
Processus pyramidalis – Pyramidal process

Bottom view of palatine bones with the anatomy terminology markup — The bottom view of palatine bones.

The list of terms:
Facies palatina laminae horizontalis – Palatine surface of horizontal plate
Processus pyramidalis – Pyramidal process
Processus sphenoidalis – Sphenoidal process
Spina nasalis posterior – Posterior nasal spine
Sulcus palatinus major – Greater palatine sulcus (pterygopalatine sulcus)

Markup for the postero-lateral view of palatine bones — Posterior & lateral aspect of palatine bones with some distance between bones.

The list of terms:
Facies nasalis laminae perpendicularis – Nasal surface of perpendicular plate
Facies maxillaris laminae perpendicularis – Maxillary surface of perpendicular plate
Processus orbitalis – Orbital process
Processus pyramidalis – Pyramidal process
Processus sphenoidalis – Sphenoidal process
Sulcus palatinus major – Greater palatine sulcus
Crista nasalis – Nasal crest

Lateral view of palatine bones with the anatomy terminology markup — The lateral aspect of right palatine bone.
Note that posterior & inferior portion of the maxillar surface directly articulate with maxilla and anterior portion of that surface cover the maxillary sinus.

The list of terms:
Facies maxillaris laminae perpendicularis – MAxillary surface of perpendicular plate
Sulcus palatinus major – Greater palatine sulcus
Incisura sphenopalatina – Sphenopalatine notch

Medial view of palatine bones with the anatomy terminology markup — Medial aspect of right palatine bone.

The list of terms:
Facies nasalis laminae perpendicularis – Nasal surface of perpendicular plate
Lamina horizontalis – Horizontal plate
Crista ethmoidalis – Ethmoid crest
Crista conchalis – Conchal crest
Incisura sphenopalatina – Sphenopalatine notch

First published: Jul/2019
Last update: 19/Nov/2020