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Orbital lamina


The orbital lamina is the thin lateral plate of the ethmoidal labyrinth. It is a smooth, rectangular plate that forms most of the medial wall of the orbit. Just medial to the plate are the middle and posterior air sinuses of the ethmoidal labyrinth.


Orbital arises from the Latin orbis meaning a circle. Medieval anatomists were the first to apply this term to the eye socket. The term lamina is Latin for plate, leaf, or thin scale.


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