Hiatus semilunaris
| Hiatus semilunaris | |
|---|---|
| Lateral wall of nasal cavity; the three nasal conchæ have been removed. (Third caption from the top.) | |
| Gray's | subject #223 995 |
| Dorlands/Elsevier | h_11/12422076 |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
The hiatus semilunaris is a halfmoon-shaped groove in the lateral wall of the nasal cavity. It is bounded inferiorly and anteriorly by the sharp concave margin of the uncinate process of the ethmoid bone, superiorly by the ethmoidal bulla, and posteriorly by the ethmoidal process of the inferior nasal concha. Following the curve anteriorly leads into the infundibulum of the frontonasal duct, which drains the frontal sinus.
The anterior ethmoidal cells open into the front part of the infundibulum; in slightly over 50% of subjects, this is directly continuous with the frontonasal duct from the frontal air sinus. When the anterior end of the uncinate process fuses with the front part of the bulla, however, this continuity is interrupted and the frontonasal duct then drains directly into the anterior end of the middle meatus.
External links
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
Table of Contents In Alphabetical Order | By Individual Diseases | Signs and Symptoms | Physical Examination | Lab Tests | Drugs
Editor Tools Become an Editor | Editors Help Menu | Create a Page | Edit a Page | Upload a Picture or File | Printable version | Permanent link | Maintain Pages | What Pages Link HereThere is no pharmaceutical or device industry support for this site and we need your viewer supported Donations | Editorial Board | Governance | Licensing | Disclaimers | Avoid Plagiarism | Policies
