Interior top-down view: The probe is pointing to the cribiform plate (aka "horizontal lamina") that forms the horizontal "roof" of the ethmoid bone. The cribiform plate is barely visible from this view, however it is easy to identify because it is perpendicular to the vertical projection attached to it (crista galli). Memory hook: "The CRIB-iform plate is a nice place for a rooster (crista galli) to rest".
It is "Cribriform plate."
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