Sphenoidal process of palatine bone
thin, compressed plate, much smaller than the orbital, and directed upward and medialward
The sphenoidal process of palatine bone is a thin, superomedially directed plate of bone. It is smaller and more inferior compared to the orbital process of palatine bone.
Anatomy
Surfaces
The superior surface articulates with the root of the pterygoid process and the under surface of the sphenoidal concha, its medial border reaching as far as the ala of the vomer; it presents a groove which contributes to the formation of the pharyngeal canal.
The medial surface is concave, and forms part of the lateral wall of the nasal cavity.
The lateral surface is divided into an articular and a non-articular portion: the former is rough, for articulation with the medial pterygoid plate; the latter is smooth, and forms part of the pterygopalatine fossa.
Borders
The anterior border forms the posterior boundary of the sphenopalatine notch.
The posterior border, serrated at the expense of the outer table, articulates with the vaginal process of the medial pterygoid plate of sphenoid bone.
The medial border articulates with ala of vomer.
The orbital and sphenoidal processes are separated from one another by the sphenopalatine notch. Sometimes the two processes are united above, and form between them a complete foramen, or the notch may be crossed by one or more spicules of bone, giving rise to two or more foramina.
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This entry incorporates text from “Sphenoidal process of palatine bone” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.