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'''Nasion''' is an anatomical term used in the field of [[Anthropology]] and [[Craniofacial surgery]] to describe a specific landmark on the human skull. The nasion is the midpoint of the [[Frontonasal suture]], where the [[Frontal bone]] and two [[Nasal bones]] meet. This point is also the upper limit of the [[Nasal bridge]].
{{Short description|Anatomical landmark on the human skull}}


== Anatomy ==
==Nasion==
The '''nasion''' is an important anatomical landmark located on the human skull. It is the point where the frontal and two nasal bones meet, situated at the bridge of the nose. This point is often used in [[anthropometry]] and [[craniometry]] to measure various aspects of the skull and face.


The nasion is located between the eyes, at the intersection of the frontal and nasal bones. It is a significant point of reference in both anthropology and craniofacial surgery. In anthropological studies, the nasion is used as a standard craniometric point for measurements of the skull. In craniofacial surgery, the nasion is an important landmark for surgical procedures involving the nasal and frontal bones.
[[File:Nasion.png|thumb|right|Diagram showing the location of the nasion on the human skull.]]


== Clinical significance ==
==Anatomical Significance==
The nasion is a crucial reference point in both clinical and research settings. It serves as a landmark for:


The position of the nasion can vary greatly among individuals and ethnic groups, and this variation can have significant implications for both cosmetic and reconstructive surgery. For example, a low or depressed nasion can result in a flat or saddle-nose deformity, while a high nasion can give the appearance of a prominent or humped nose. Surgeons may modify the position of the nasion during [[Rhinoplasty]] or other facial surgeries to improve the patient's appearance or to correct deformities.
* '''Cranial measurements''': The nasion is used in the measurement of the [[cranial index]] and other cranial dimensions.
* '''Facial symmetry''': It helps in assessing facial symmetry and proportions, which are important in [[orthodontics]] and [[maxillofacial surgery]].
* '''Surgical planning''': Surgeons use the nasion as a guide in procedures involving the [[nasal cavity]] and [[sinuses]].


== See also ==
==Clinical Relevance==
In clinical practice, the nasion is often used as a reference point in:


* [[Glabella]]
* '''Cephalometric analysis''': This is a diagnostic tool used in [[orthodontics]] to assess the relationships between dental and skeletal components of the head.
* [[Inion]]
* '''Reconstructive surgery''': The nasion is a key landmark in planning surgeries that involve the reconstruction of the nasal and frontal regions.
* [[Rhinoplasty]]
* [[Craniofacial surgery]]
* [[Anthropometry]]


== References ==
==Anthropological Importance==
In [[anthropology]], the nasion is used to study human evolution and variation. It provides insights into:


<references />
* '''Population differences''': Variations in the position and prominence of the nasion can indicate different [[ancestry]] and [[ethnic groups]].
* '''Evolutionary changes''': Changes in the nasion over time can reflect evolutionary adaptations in human populations.
 
==Related Pages==
* [[Anthropometry]]
* [[Cranial index]]
* [[Orthodontics]]
* [[Maxillofacial surgery]]
* [[Cephalometric analysis]]


[[Category:Anatomy]]
[[Category:Anatomy]]
[[Category:Anthropology]]
[[Category:Anthropology]]
[[Category:Craniofacial surgery]]
[[Category:Skull]]
[[Category:Medical terminology]]
 
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{{dictionary-stub1}}
 
= Nasion =
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File:Nasion Gray1198.png
File:Nasion.PNG
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Revision as of 17:43, 18 February 2025

Anatomical landmark on the human skull


Nasion

The nasion is an important anatomical landmark located on the human skull. It is the point where the frontal and two nasal bones meet, situated at the bridge of the nose. This point is often used in anthropometry and craniometry to measure various aspects of the skull and face.

File:Nasion.png
Diagram showing the location of the nasion on the human skull.

Anatomical Significance

The nasion is a crucial reference point in both clinical and research settings. It serves as a landmark for:

  • Cranial measurements: The nasion is used in the measurement of the cranial index and other cranial dimensions.
  • Facial symmetry: It helps in assessing facial symmetry and proportions, which are important in orthodontics and maxillofacial surgery.
  • Surgical planning: Surgeons use the nasion as a guide in procedures involving the nasal cavity and sinuses.

Clinical Relevance

In clinical practice, the nasion is often used as a reference point in:

  • Cephalometric analysis: This is a diagnostic tool used in orthodontics to assess the relationships between dental and skeletal components of the head.
  • Reconstructive surgery: The nasion is a key landmark in planning surgeries that involve the reconstruction of the nasal and frontal regions.

Anthropological Importance

In anthropology, the nasion is used to study human evolution and variation. It provides insights into:

  • Population differences: Variations in the position and prominence of the nasion can indicate different ancestry and ethnic groups.
  • Evolutionary changes: Changes in the nasion over time can reflect evolutionary adaptations in human populations.

Related Pages

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