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In mammalian anatomy, the cribriform plate (Latin for lit. sieve -shaped), horizontal lamina or lamina cribrosa is part of the ethmoid bone. It is received into the ethmoidal notch of the frontal bone and roofs in the nasal cavities.
The cribriform plate (Latin 'cribriform' = perforated) lies within the ethmoidal notch of the frontal bone and forms the roof of the nasal cavity. As the name suggests it comprises numerous openings through which the olfactory fibers from the nasal cavity pass through to the anterior cranial fossa.
The ethmoid bone is made up of three parts – the cribriform plate, the perpendicular plate, and the ethmoidal labyrinth. The cribriform plate forms the roof of the nasal cavity. It is pierced by numerous olfactory nerve fibres, which gives it a sieve-like structure.
The ethmoid bone is an anterior cranial bone located between the eyes. [3] It contributes to the medial wall of the orbit, the nasal cavity, and the nasal septum. [3] The ethmoid has three parts: cribriform plate, ethmoidal labyrinth, and perpendicular plate.
The cribriform plate is the horizontal plate of the ethmoid bone that forms the roof of the nasal cavity; it is perforated by many foramina for the passage of the olfactory nerves. On its superior surface is a projection called the crista galli (Dorland, 2011).
Cribriform plate. This part of the ethmoid bone lies within the frontal bone’s ethmoidal notch, forming the nasal cavity roof. The structure has derived its name from the Latin’ cribriform’, meaning ‘perforated’, as this plate has several perforations, giving it a sieve-like appearance.
The cribriform plate (less commonly also called the lamina cribrosa of the ethmoid bone) is a sieve-like structure between the anterior cranial fossa and the nasal cavity. It is a part of ethmoid bone and supports the olfactory bulb, which lies in the olfactory fossa.
The inside edges of the ethmoidal labyrinths are joined by the cribriform plate, which is also connected to the perpendicular plate. The cribriform plate is important as it forms part of the base of the skull.
Cribriform Plate of the Ethmoid Bone. The cribriform plate or horizontal lamina fits into a groove at the underside of the frontal bone. This ethmoid bone part provides a roof for the nasal cavity and a floor for the olfactory bulb.
The ethmoid bone has a cribriform plate—a perforated, horizontal structure at the top of the nasal cavity—which allows olfactory nerves to pass through, enabling the brain to detect smells.