The middle meatus is the middle-sized and located nasal opening, lying underneath the middle concha and above the inferior concha where the meatus extends along its length.

Jan 17, 2025 · The Middle nasal meatus, also known as the middle nasal concha or the middle nasal turbinate, is a long, narrow, curved structure located within the nasal cavity of the human head. [1] It is one of three pairs of nasal conchae, or bony shelves, that are found within the nasal cavity and are responsible for warming, moistening, and filtering the ...

Dec 20, 2024 · The middle meatus is an air passage of the lateral nasal cavity located between the middle nasal concha and lateral nasal wall. The anterior ethmoid air cells, maxillary and frontal sinuses all drain into the middle meatus.

Sep 13, 2023 · The middle nasal meatus is formed by the middle nasal concha superiorly, and the inferior nasal concha inferiorly. The middle meatus is longer and deeper than its superior counterpart. This passage communicates with the frontal sinus (air-filled opening in the frontal bone) through a funnel-shaped opening called the ethmoidal infundibulum. In ...

The middle meatus is below and lateral to the middle concha, and is continued anteriorly into a shallow depression, situated above the vestibule and named the atrium of the middle meatus. On raising or removing the middle concha the lateral wall of this meatus is fully displayed.

Sep 29, 2019 · The frontal, maxillary and anterior ethmoidal sinuses open into the middle meatus. The location of this opening is marked by the semilunar hiatus, a crescent-shaped groove on the lateral walls of the nasal cavity.

Feb 11, 2023 · The middle turbinate usually curves medially toward the nasal septum. However, the resultant anatomic variant is known as a paradoxical middle turbinate when the turbinate curves laterally. Such a variant can narrow or obstruct the …

Apr 20, 2015 · Middle meatus. Situated between the middle and inferior concha, the middle meatus extends from the starting to the finishing point of the latter. It has a bony projection known as the ethmoidal bulla, which contains the middle ethmoidal cells. The uncinate process, a horn-shaped bony projection, is located beneath this bulla.

The middle meatus and hiatus semilunaris are areas where variations can occur which predispose patients to recurring sinusitis. Endoscopy allows for visualization of the entire nasal cavity, for both diagnostic and therapeutic uses.

May 3, 2023 · The nasal meatuses are distinct air passages of the lateral nasal cavity located inferior to each nasal conchae. The plural of meatus is meatus (Latin noun of the fourth declension) or meatuses. Meati is incorrect. There are three main nasal meatuses: A fourth supreme meatus may exist if the supreme nasal concha is present.