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A fractured cribriform plate (anterior skull trauma) can result in leaking of cerebrospinal fluid into the nose and loss of sense of smell. The tiny apertures of the plate transmitting the olfactory nerve become the route of ascent for a pathogen, Naegleria fowleri.
The specialized olfactory receptor neurons of the olfactory nerve are located in the olfactory mucosa of the upper parts of the nasal cavity.The olfactory nerves consist of a collection of many sensory nerve fibers that extend from the olfactory epithelium to the olfactory bulb, passing through the many openings of the cribriform plate, a sieve-like structure of the ethmoid bone.
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. There ...
Located in the cribriform plate of the ethmoid bone. Animal research indicates that the terminal nerve is involved in the detection of pheromones. [2] I Olfactory: Purely sensory Telencephalon: Located in the olfactory foramina in the cribriform plate of the ethmoid bone. Transmits the sense of smell from the nasal cavity. [3] II Optic: Sensory
The CNS is usually protected by the blood–brain barrier, but holes in the cribriform plate let bacteria get through the barrier. The blood–brain barrier makes it extremely difficult to treat such infections, because only certain drugs can cross into the CNS. An ethmoid fracture can also sever the olfactory nerve.
The olfactory bulb is supported and protected by the cribriform plate of the ethmoid bone, which in mammals separates it from the olfactory epithelium, and which is perforated by olfactory nerve axons. The bulb is divided into two distinct structures: the main olfactory bulb and the accessory olfactory bulb.
The paired anterior ethmoidal foramen connects the anterior cranial fossa with each orbit and transmits the anterior ethmoidal artery, nerve and vein. The cribriform foramina are the openings in the cribriform plate of the ethmoid bone, which connect the anterior cranial fossa with the nasal cavity and transmit the olfactory nerves. [2]
Nerves frontal-supraorbital foramen: 2: supraorbital artery supraorbital vein: supraorbital nerve: frontal: anterior cranial fossa: foramen cecum: 1: emissary veins to superior sagittal sinus from the upper part of the nose [3] ethmoid: anterior cranial fossa (osama) foramina of cribriform plate ~20-olfactory nerve bundles (I) ethmoid: anterior ...