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]
| Piriform aperture | |
|---|---|
 A human skull with the piriform aperture circled in red | |
 A self-portrait by Michiel Sweerts depicting him putting his finger into a skull's piriform aperture | |
| Details | |
| Identifiers | |
| Latin | apertura piriformis |
| TA98 | A02.1.00.088 |
| TA2 | 493 |
| FMA | 53137 |
| Anatomical terminology | |
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
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This article incorporates text in the public domain from page 196 of the 20th edition of Gray's Anatomy (1918)
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