Nasion
A natural dip in the bone structure between the eyes and the top of the nose.
The nasion denotes a precise anatomical coordinate situated where multiple cranial bones converge. This fixed structural point functions as a reliable reference marker for cephalometric analysis while appearing as a subtle surface hollow on the human face.
- It marks the foremost point of the frontonasal suture.
- Visible as a shallow dip between the eyes.
- Sits just above the bridge of the nose.
- Used as a standard cephalometric measurement point.
- Located slightly beneath the glabella region.
What it is
This point marks the very front edge of the line where the forehead bone meets the two small bones forming the upper nose. You can spot it as a gentle inward curve sitting right in the middle of your face. It rests directly between the inner corners of both eyes and sits just above the starting point of the nasal bridge. When viewed from the side, it aligns with the centre of the skull surface. This shallow hollow is a fixed reference used by specialists who study head proportions. It sits slightly lower than the smooth area found higher up on the forehead.
The science
The structure belongs to the skeletal framework of the head. It forms at the junction of the frontonasal suture and the internasal suture. These seams connect the nasal portion of the frontal bone with the paired nasal bones. Medical professionals treat this spot as a reliable cephalometric landmark. They use it to map out facial dimensions and track growth patterns during development. Because it sits at a stable bony intersection, it provides a consistent baseline for clinical assessments and anthropological studies.
Questions people ask about Nasion
Where exactly does the nasion sit on the face?
It appears as a clearly defined hollow directly between the eyes. This shallow indentation rests just above the bridge of the nose, marking the central meeting point of several skull bones.
What bones form this anatomical landmark?
The point sits where the frontonasal suture joins the nasal part of the frontal bone and the paired nasal bones. It also marks the centre where that line crosses the internasal suture.
How do experts use this facial feature?
Specialists classify it as a cephalometric landmark. They rely on its fixed position to measure head proportions, track skeletal development, and record consistent reference points for clinical analysis.
Good reading and sources
The facts on this page come from the Wikipedia article "Nasion", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). EveryFaceShape rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
It may contain mistakes, and figures change over time. Nothing here is investment or buying advice. If something is wrong, tell us. Last refreshed 2026-11-15.
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