What is hiatus semilunaris?
The hiatus semilunaris is a semicircular shaped opening located on the lateral wall of the nasal cavity. It is a component of the ostiomeatal complex and serves as the opening for the frontal and maxillary sinuses and the anterior ethmoid air cells.
What is Ethmoidal Infundibulum?
The ethmoid infundibulum is a curved cleft of the ethmoid bone which leads into the anterior portion of the hiatus semilunaris. It is bordered medially by the uncinate process and laterally by the orbital plate of the ethmoid.
What is Ethmoidal Bulla?
The ethmoid bulla is the largest anterior ethmoid air cell. It is also one of the most consistent air cells in the middle meatus and is therefore a reliable anatomic landmark (Fig. 2.13). It often lacks a posterior wall, which is why it is not called a cell but rather a bony lamella with a large airspace behind it.
Does frontal sinus drain into hiatus semilunaris?
sinus opens into the osteomeatal complex. Osteomeatal complex is the term used for a group of anatomical structures that contribute to the final common drainage pathway of Maxillary, Anterior Ethmoidal and Frontal sinuse . Frontal sinus open into the hiatus semilunaris in the middle meatus .
Which sinus opens into hiatus semilunaris?
The semilunar hiatus or hiatus semilunaris, is a crescent-shaped groove in the lateral wall of the nasal cavity just inferior to the ethmoid bulla. It is the location of the openings for maxillary sinus.
What is another name for Infundibulum?
Brain: the pituitary stalk, also known as the infundibulum and infundibular stalk, is the connection between the hypothalamus and the posterior pituitary.
What is Infundibulum anatomy?
The infundibulum (Latin: “funnel”) is the funnel-shaped portion of the right ventricle that opens into the pulmonary artery. Its narrowing is also called infundibular stenosis. Pulmonary stenosis is usually a congenital defect and may be associated with other cardiovascular congenital defects.
What is the uncinate process?
The uncinate process is an extension of the inferior part of the head of the pancreas that projects medially and wraps around the superior mesenteric vessels.
What drains into ethmoidal bulla?
The middle ethmoid air cells drain into the ethmoidal bulla. The maxillary sinus also drains into the semilunar hiatus here, posteriorly. In the inferior nasal meatus, the pin is in the opening of the nasolacrimal duct, draining the lacrimal sac near the eye into the nasal cavity.
What are ethmoidal cells?
The ethmoid sinuses or ethmoid air cells of the ethmoid bone are one of the four paired paranasal sinuses. The cells are variable in both size and number in the lateral mass of each of the ethmoid bones and cannot be palpated during an extraoral examination. They are divided into anterior and posterior groups.