ethmoid bone

Structure

• unpaired bone of the cranium lying between the orbital plates of the frontal bone, anterior to the sphenoid bone
• it consists of 2 lateral thin plates enclosing air cells
• the ethmoid bone borders the anterior cranial fossa, the orbits & nasal cavity, & cribriform plate above

Articulation

• the ethmoid bone articulates with the sphenoid bone, frontal bone, maxilla, lacrimal bone, palatine bone, inferior nasal concha & vomer.

More general terms

• bone

More specific terms

• ala/wing of crista galli (alar process)
• ethmoidal groove/sulcus
• ethmoidal labyrinth; lateral mass of the ethmoid bone
• ethmoidal notch
• ethmoidal process of inferior concha
• perpendicular plate of ethmoid bone
• uncinate process of ethmoid bone

Component of

• skull (cranium)

Components

• orbital (plate/lamina/layer) of ethmoid bone, (paper/papyraceous plate)
• cribriform plate of ethmoid bone, (cribrum, sieve bone, sieve plate)
• crista galli
• superior nasal concha (superior turbinated bone)
• middle nasal concha (middle turbinated bone)