Perpendicular plate of ethmoid bone

Bone: Perpendicular plate of ethmoid bone
Perpendicular plate of ethmoid. Shown by removing the right labyrinth.
Ethmoid bone from behind.
Latin	lamina perpendicularis ossis ethmoidalis
Gray's	subject #36 154

Bones and cartilages of septum of nose. Right side.

The perpendicular plate of the ethmoid bone (vertical plate) is a thin, flattened lamina, polygonal in form, which descends from the under surface of the cribriform plate, and assists in forming the septum of the nose; it is generally deflected a little to one or other side. The anterior border articulates with the spine of the frontal bone and the crest of the nasal bones.

The posterior border articulates by its upper half with the sphenoidal crest, by its lower with the vomer.

The inferior border is thicker than the posterior, and serves for the attachment of the septal cartilage of the nose.

The surfaces of the plate are smooth, except above, where numerous grooves and canals are seen; these lead from the medial foramina on the cribriform plate and lodge filaments of the olfactory nerves.

Additional images

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  Medial wall of left nasal fossa.

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  Bones and cartilages of septum of nose. Right side.

External links

• SUNY Figs 33:02-02 - "Diagram of skeleton of medial (septal) nasal wall."
• perpendicular+plate+of+ethmoid+bone at eMedicine Dictionary
• Atlas of anatomy at UMich rsa1p7 - "Nasal septum, lateral view"
• Norman/Georgetown lesson9

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant. Template:Skull