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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) type 4: has asymmetric depths (described by Stammberger) 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.
The nasal meatuses are the spaces beneath each of the corresponding nasal conchae. In the case where a fourth, supreme nasal concha is present, there is a fourth supreme nasal meatus. Structure Coronal section of nasal cavity. The superior meatus is the smallest of the three. It is a narrow cavity located obliquely below the superior concha.
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. It is continuous with the skin through the nostrils, and with the mucous membrane of the nasal part of the ...
Muscles of the head, face, and neck. The dilator naris muscle (or alae nasi muscle) is a part of the nasalis muscle. It has an anterior and a posterior part. It has origins from the nasal notch of the maxilla and the major alar cartilage, and a single insertion near the margin of the nostril. It controls nostril width, including changes during ...
Erectile tissue is present in the anterior part of the nasal septum and is attached to the turbinates of the nose. The nasal cycle occurs as the erectile tissue on one side of the nose congests and the other side decongests. This process is controlled by the autonomic nervous system with parasympathetic dominance being associated with ...
The nasalis muscle covers the nasal cartilages of the lower surface of the nose. [1] It consists of two parts, transverse and alar : The transverse part ( compressor naris muscle) arises from the maxilla, above and lateral to the incisive fossa. Its fibers proceed upward and medially, expanding into a thin aponeurosis which is continuous on the ...
The anterior nasal glands help moisturize the nasal mucosa. Seromucous glands. The seromucous glands are found primarily in the anterior nasal cavity, and they are also found within the nasal cavity. Bowman glands. The Bowman glands are serous glands that help the olfactory region with smelling. Notes. Medical Definition
The nasal septum contains bone and hyaline cartilage. [3] It is normally about 2 mm thick. [4] 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 ...