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Corpus: Nasal bone

1. Definition

The nasal bone is a small, elongated, paired bone that is part of the skull. It forms the front part of the nasal roof.

2. Anatomy

2.1. Surfaces

The outer surface of the nasal bone is concave in the longitudinal direction and convex in the transverse direction. A small perforation for a vein is visible approximately in the center of the bone. The inner surface facing the nasal cavity shows a longitudinal groove for the nasociliary nerve. The suture between the right and left nasal bones is called the internasal suture. Together with the glabella of the frontal bone, the two nasal bones form the nasofrontal suture, with the most anterior point referred to as the "nasion." The nasal bones are not involved in the formation of the orbit.

2.2. Margins

The nasal bone is associated with the following structures:

Margin Neighboring structure Sutur
Superior margin Frontal bone Nasofrontal suture
Medial margin Nasal bone of the opposite side Internasal suture
Lateral margin Frontal process of the maxilla Nasomaxillary suture

The inferior margin of the nasal bone merges into the lateral nasal cartilage. Dorsally, the nasal bone connects to the perpendicular plate of the ethmoid bone.

3. Embryology

Ossification of the nasal bone starts in the 8th embryonic week and is completed before birth.

4. Clinic

Due to its exposed position, the nasal bone is susceptible to fractures from violent impacts to the face.

Stichworte: Bone, Corpus, Head

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Dr. rer. nat. Fabienne Reh
DocCheck Team
Natascha van den Höfel
DocCheck Team
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Letzter Edit:
19.06.2024, 08:45
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Nutzung: BY-NC-SA
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