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Corpus: Inferior nasal concha

1. Definition

The inferior nasal concha is a skull bone that is the bony base of the homonymous inferior nasal concha.

2. Anatomy

The inferior nasal concha runs along the lateral nasal wall. It consists of a cancellous bone lamella that is partially rolled up around its longitudinal axis like a leaf. Below the inferior nasal concha is the inferior nasal meatus, into which the nasolacrimal duct opens.

2.1. Medial surface

The medial surface is convex and has fine, horizontal depressions that harbor blood vessels.

2.2. Lateral surface

The lateral surface is concave and forms the medial border of the inferior nasal meatus.

2.3. Superior margin

The thin upper edge is connected to the lateral nasal wall, where it articulates with four bones:

The superior border can be further subdivided into three parts: an anterior, a middle, and a posterior portion. The middle portion has three prominent bony processes:

  • The maxillary process is a thin, caudally and laterally directed bony lamella that lies in front of the opening of the maxillary sinus and forms part of the medial maxillary sinus wall.
  • The ethmoid process attaches to the uncinate process of the ethmoid bone, further narrowing the opening of the maxillary sinus.
  • The pointed lacrimal process points towards the lacrimal bone, forming part of the inner wall of the nasolacrimal canal.

2.4. Inferior margin

The lower, free edge of the inferior nasal concha protrudes into the nasal cavity. It is significantly thicker than the upper edge.

Stichworte: Bone, Corpus, Head

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Dr. rer. nat. Fabienne Reh
DocCheck Team
Miriam Dodegge
DocCheck Team
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Letzter Edit:
18.06.2024, 16:21
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