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Ethmoid
Question | Answer |
---|---|
Crista galli | triangular crest on the top of the ethmoid—sticks through the cribriform plate |
Perpendicular plate | flattened lamina at the midline of the ethomoid – forms part of the nasal septum and articulates with the vomer |
Cribriform plate | best observed endocranially – it is a sort of sieve like surface which the crista galli perforates through |
Orbital surface | smooth surface on either side |
Superior nasal concha | outer plates – middle nasal concha are inside these |
Middle nasal concha | surround the perpendicular plate on either side—located close to the midline |
Anterior ethmoidal foramen | located to the sides of the crista galli – anterior are the small holes towards the anterior |
Posterior ethmoidal foramen | larger holes towards the posterior located next to the crista galli |