What is the main function of cribriform plate?
Function. The cribriform plate is perforated by olfactory foramina, which allow for the passage of the olfactory nerves to the roof of the nasal cavity. This conveys information from smell receptors to the brain.
What passes through cribriform plate?
The filaments of the olfactory nerve, here they are in close-up, pass through the cribriform plate and run just beneath the mucous membrane to reach nerve endings in this olfactory area on the lateral and medial surfaces of the nasal cavity. The next nerve we’ll look at is the second cranial nerve, the optic nerve.
What is a Keros?
The Keros classification is a method of classifying the depth of the olfactory fossa. The ethmoid labyrinth is covered by the fovea ethmoidalis of the frontal bone and separates the ethmoidal cells from the anterior cranial fossa. It contains olfactory bulb and the anterior ethmoidal artery.
Where is Keros measured?
Keros classification7 was assessed according to the depth of the cribriform plate, measured as the vertical height of the olfactory fossa in the CT coronal plane and classified as type 1, 2 and 3.
What’s a cribriform plate?
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.
What can cause a fracture of the cribriform plate?
The most common cause of cribriform plate fractures is blunt force trauma to the face, which makes up 80%-90% of cases. [1] A fracture of the cribriform plate requires a heavy frontal impact and a significant mechanism of injury.
What is the function of the cribriform plate quizlet?
The cribriform plate forms the roof of the nasal cavity. It allows the sensory nerves for smell to pass to the brain. The crista galli is a superior projection to which membranes that surround the brain attach. Most flat bones are formed by intramembranous ossification.
What is cribriform plate?
The cribriform plate is a transverse plate, pierced by many small cribriform foramina, that forms the anteroventral wall of the cranial cavity. From: The Dissection of Vertebrates (Second Edition), 2011.
What is the olfactory fossa?
Background: Olfactory fossa (OF) is a depression in anterior cranial cavity whose floor is formed by cribriform plate of ethmoid. Lateral lamella, which forms its lateral boundary, is a thin plate of bone and is at risk of injury during functional endoscopic sinus surgery, especially when fossa is deep/asymmetric.
What is Type 2 olfactory fossa?
The depth of the olfactory fossa is determined by the height of the lateral lamella of the cribriform plate, which can be classified into three categories: type 1: has a depth of 1-3 mm (26.3% of population) type 2: has a depth of 4-7 mm (73.3% of population) type 3: has a depth of 8-16 mm (0.5% of population)
How thick is the cribriform plate?
The average width of the cribriform plate (including the crista galli) was 4.53mm (range 1.75-8.03mm, SD 1.20mm).
How can you test if the cribriform plate is damaged?
[4] Clear or bloody fluid draining from the nose or ear is concerning for a basilar skull fracture with CSF leak. Specifically, clear or bloody rhinorrhea is highly suspicious of a cribriform plate fracture with a dural fistula.