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At the front part of the cribriform plate, on either side of the crista galli, is a small fissure that is occupied by a process of dura mater. Lateral to this fissure is a notch or foramen which transmits the nasociliary nerve ; from this notch a groove extends backward to the anterior ethmoidal foramen.
foramina of cribriform plate ~20-olfactory nerve bundles (I) ethmoid: anterior cranial fossa: anterior ethmoidal foramen: 2: anterior ethmoidal artery anterior ethmoidal vein: anterior ethmoidal nerve: ethmoid: anterior cranial fossa: posterior ethmoidal foramen: 2: posterior ethmoidal artery posterior ethmoidal vein: posterior ethmoidal nerve ...
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The olfactory foramina, also known as the cribriform foramina (cribr- is "a sieve" in Greek), is the grouping of holes located on the cribriform plate.The cribriform plate forms the roof of the nasal cavity, and the olfactory foramina are in the two depressions lateral to the median blade of the cribriform plate called the crista galli.
The ethmoid has three parts: cribriform plate, ethmoidal labyrinth, and perpendicular plate. The cribriform plate forms the roof of the nasal cavity and also contributes to formation of the anterior cranial fossa, [4] the ethmoidal labyrinth consists of a large mass on either side of the perpendicular plate, and the perpendicular plate forms ...
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 anterior surface of the body [Fig. 2] presents, in the middle line, a vertical crest, the sphenoidal crest, which articulates with the perpendicular plate of the ethmoid, and forms part of the nasal septum. On either side of the crest is an irregular opening leading into the corresponding sphenoidal air sinus.