Does the olfactory nerve pass through the cribriform plate?
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Does the olfactory nerve pass through the cribriform plate?
The cribriform plate is here. 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.
What Fibres does the olfactory nerve have?
The Cranial Nerves for Smell and Vision. Cranial nerve I, the olfactory nerve, is actually a plexus of thin fibers that unite in about twenty small bundles called fila olfactoria. The olfactory receptors are situated in the mucous membrane of the nasal cavity.
What nerve passes through the cribriform plate?
the olfactory nerves
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 is found within the olfactory foramina of the cribriform plate?
cribriform foramina openings in the cribriform plate of the ethmoid bone, transmitting approximately 20 bundles of nerve fibers that collectively constitute the olfactory nerve (CN I).
Are olfactory bulbs superior or inferior to the cribriform plate?
Olfactory Receptors. The olfactory bulb lies on the cribriform plate of the ethmoid bone. In this location it is inferior to medial aspects of the frontal lobe (Fig.
Which of the following bones contains the cribriform plate which is involved in olfaction smell and the perpendicular plate which forms the majority of the nasal septum?
The cribriform plate is the portion of the ethmoid bone that forms the roof of the nasal cavity. This narrow bony structure contains deep grooves known as olfactory fossa, which supports the olfactory bulb.
Which bone structure has the Cribriform Foramina for the olfactory nerves?
the ethmoid bone
1 Cribriform plate of the ethmoid bone. It is through the cribriform plate that the olfactory nerve fibers reach the nasal fossa.
Where are the olfactory receptor neurons located?
nasal epithelium
Olfactory sensory neurons, located in the nasal epithelium, detect and transmit odorant information to the central nervous system. This requires that these neurons form specific neuronal connections within the olfactory bulb and express receptors and signaling molecules specific for these functions.
Where are olfactory nerves located?
The olfactory nerve divides into two branches. These are: Lateral olfactory nerves- located in the superior nasal concha. Medial olfactory nerves- located along the nasal septum.
What is the purpose of the cribriform plate?
This bone, the cribriform plate, transmits the olfactory nerves that carry the sense of smell.
How does the structure of the olfactory nerves differ from the other cranial nerves?
In which ways does the olfactory nerve (N I) differ from the other cranial nerves? A) It contains somatic motor as well as autonomic components. B) The olfactory tract is actually a part of the cerebrum, and not truly a nerve.
What does the cribriform plate articulate with?
It is located between the orbits, centered on the midline. It articulates with thirteen bones: the frontal, sphenoid, nasals, maxillae, lacrimals, palatines, inferior nasal conchae, and vomer.
What are the 3 types of cells associated with the olfactory epithelium and what are their functions?
The olfactory epithelium consists of 3 cell types: basal, supporting, and olfactory receptor cells. Basal cells are stem cells that give rise to the olfactory receptor cells (seen in the image below). The continuous turnover and new supply of these neurons are unique to the olfactory system.
What structure does the olfactory nerve innervate?
Olfactory nerve (CN I) Cranial nerve 1 is a special somatic afferent nerve which innervates the olfactory mucosa within the nasal cavity. It carries information about smell to the brain.
What is unique about the olfactory nerve and its neurons?
The olfactory nerves (cranial nerve I) are unique in that their cell bodies lie in the olfactory epithelium (the surface membrane lining the upper parts of the nasal passages), each sending a nerve fibre back to the brain.
How is the cribriform plate involved and what cranial nerve is formed?
The cribriform plate roofs the nasal cavities, and because it is perforated by many tiny foramina it looks like a sieve. Olfactory nerves (cranial nerve 1) perforate this plate as they pass up to the brain from the mucous lining of the nose.
What type of cells are found in the olfactory mucosa?
Olfactory mucosa lines the roof and portions of the walls of the nasal cavity. It contains several cell types: basal cells, brush cells, olfactory cells and sustentacular cells. Basal cells are located in the basal lamina. Brush cells are involved with general sensation of the olfactory mucosa.
