The piriform aperture, pyriform aperture, or anterior nasal aperture is a pear-shaped opening in the human skull. Its long axis is vertical, and narrow end upward; in the recent state it is much contracted by the lateral nasal cartilage and the greater and lesser alar cartilages of the nose.[1]

It is bounded above by the inferior borders of the nasal bones; laterally by the thin, sharp margins which separate the anterior from the nasal surfaces of the maxilla; and below by the same borders, where they curve medialward to join each other at the anterior nasal spine.[1]

References

  1. ^ a b Public domain This article incorporates text in the public domain from page 196 of the 20th edition of Gray's Anatomy (1918)


Allikas: https://en.wikipedia.org/wiki/Pyriform_aperture
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