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The nerve supply to the nose and paranasal sinuses comes from two branches of the trigeminal nerve (CN V): the ophthalmic nerve (CN V 1), the maxillary nerve (CN V 2), and branches from these.
The nasal septum is composed of four structures: Maxillary bone (the crest) Perpendicular plate of ethmoid bone. Septal nasal cartilage (ie, quandrangular cartilage) Vomer bone. The lowest part of the septum is a narrow strip of bone that projects from the maxilla and the palatine bones, and is the length of the septum.
The sphenoid sinus is a paired paranasal sinus occurring within the body of the sphenoid bone. It represents one pair of the four paired paranasal sinuses. [1] The pair of sphenoid sinuses are separated in the middle by a septum of sphenoid sinuses.
The abducens nerve. The facial nerve. The vestibulocochlear nerve. The glossopharyngeal nerve. The vagus nerve. The accessory nerve. The hypoglossal nerve. The spinal nerves. The posterior divisions.
Nerve supply. Innervation of the nasal cavity responsible for the sense of smell is via the olfactory nerve, which sends microscopic fibers from the olfactory bulb through the cribriform plate to reach the top of the nasal cavity. General sensory innervation is by branches of the trigeminal nerve (V 1 and V 2): Nasociliary nerve (V 1)
The maxillary sinuses, the largest of the paranasal sinuses, are under the eyes, in the maxillary bones (open in the back of the semilunar hiatus of the nose). They are innervated by the maxillary nerve (CN V2).
In humans, the nose is located centrally on the face and serves as an alternative respiratory passage especially during suckling for infants. The protruding nose that is completely separate from the mouth part is a characteristic found only in therian mammals.
The nasal cartilages are structures within the nose that provide form and support to the nasal cavity. The nasal cartilages are made up of a flexible material called hyaline cartilage (packed collagen) in the distal portion of the nose.
Olfactory mucosa. The olfactory mucosa is the neuroepithelialial mucosa [1] lining the roof and upper parts of the septum and lateral wall of the nasal cavity [1] [2] which contains bipolar neurons of the primary receptor neurons of the olfactory pathway, as well as supporting cells.
The nasal mucosa lines the nasal cavity. It is part of the respiratory mucosa, the mucous membrane lining the respiratory tract. [1] [2] The nasal mucosa is intimately adherent to the periosteum or perichondrium of the nasal conchae.
