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Nasal Bone

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Abstract

Nasal bones may be reduced in size with a concavity of the lateral margins. This is frequently accompanied by expansion of the frontal process of the maxillae. Nasal bones are rarely absent, but are frequently assymmetric. A process of the forntal bone may extend between the nasal bones and the frontal process of the maxilla. There may be only one nasal bone (unpaired) or there may be several. Internasal bones have been found at the edge of the nasal bones at the upper corner of the pyriform aperature, lying on the anterior tip of the perpendicular plate of the ethmoid.

Nasal bones may be reduced in size with a concavity of the lateral margins. This is frequently accompanied by expansion of the frontal process of the maxillae.

Nasal bones are rarely absent, but are frequently assymmetric.

A process of the forntal bone may extend between the nasal bones and the frontal process of the maxilla.

There may be only one nasal bone (unpaired) or there may be several.

Internasal bones have been found at the edge of the nasal bones at the upper corner of the pyriform aperature, lying on the anterior tip of the perpendicular plate of the ethmoid.

Transverse sutures have also been observed.

Rarely, the internasal suture is obliterated by the fusion of nasal bones.

Variations in Nasal Conchae

Variations in Nasal Conchae

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Variation in Number of Meatuses in Nasal Fossae

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Classificazione anatomica

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Adattamento

Adattamento di «Nasal Bone — Illustrated Encyclopedia of Human Anatomic Variation: Opus I: Muscular System» di Ronald A. Bergman, Adel K. Afifi, Ryosuke Miyauchi. Fonte: https://www.anatomyatlases.org/AnatomicVariants/SkeletalSystem/Text/NasalBone.shtml Opera originale distribuita con licenza CC BY-NC-SA 4.0 (https://creativecommons.org/licenses/by-nc-sa/4.0/deed.it). Adattamento a cura di Redazione AIVA. Modifiche rispetto all’originale: Testo originale inglese riprodotto integralmente e riorganizzato nel formato scheda del portale (sintesi, testo, riferimenti), senza modificarne le affermazioni. La traduzione italiana non è ancora stata eseguita, e la pagina lo dichiara. Le figure non sono state copiate: sono collegate alla pagina d’origine. Questa pubblicazione non è approvata né avallata dagli autori dell’opera originale.

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