Orbital Plate of Ethmoidal Labyrinth (Right)

Description

The orbital plate (lamina papyracea) is the thin, smooth area found along the superolateral aspect of the ethmoidal labyrinth. It contributes to the formation of the medial wall of the orbit and articulates:

—anteriorly, with the posterior border of lacrimal bone, forming the ethmoidolacrimal suture;

—posteriorly, with the anterior surface of the body of sphenoid bone, contributing to the formation of the sphenoethmoidal suture;

—superiorly, with the inferomedial aspect of the frontal bone, contributing to the formation of the frontoethmoidal suture;

—anteroinferiorly, with the orbital surface of the maxilla, forming the ethmoidomaxillary suture;

—posteroinferiorly, with the orbital process of palatine bone, forming the palatoethmoidal suture.