Ethmoid bulla: Difference between revisions
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On the lateral wall of the [[middle meatus]] is a curved fissure, the [[hiatus semilunaris]], limited below by the edge of the uncinate process of the ethmoid and above by an elevation named the '''ethmoid bulla''' (or '''ethmoidal bulla'''); the anterior [[ethmoidal cells]] are contained within this bulla and open on or near to it. |
On the lateral wall of the [[middle meatus]] is a curved fissure, the [[hiatus semilunaris]], limited below by the edge of the uncinate process of the ethmoid and above by an elevation named the '''ethmoid bulla''' (or '''ethmoidal bulla'''); the anterior [[ethmoidal cells]] are contained within this bulla and open on or near to it. |
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The bulla ethmoidalis is caused by the bulging of the anterior [[ethmoidal cells]] which open on or immediately above it, and the size of the bulla varies with that of its contained cells. The bulla may be a pneumatised cell or a bony prominence. It is also the largest among anterior ethmoidal cells |
The bulla ethmoidalis is caused by the bulging of the anterior [[ethmoidal cells]] which open on or immediately above it, and the size of the bulla varies with that of its contained cells. The bulla may be a pneumatised cell or a bony prominence. It is also the largest among anterior ethmoidal cells. When there is a space behind and above the bulla it's called as retrobullar and suprabullar recess . These two recesses together form lateral sinus known as '''''sinus lateralis of grunwald''''' which is bounded superiorly by the skull base. |
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==References== |
==References== |
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Revision as of 13:28, 14 September 2018
| Ethmoid bulla | |
|---|---|
| Identifiers | |
| TA98 | A06.1.02.026 A02.1.07.015 |
| TA2 | 3150, 736 |
| FMA | 57487 |
| Anatomical terminology | |
On the lateral wall of the middle meatus is a curved fissure, the hiatus semilunaris, limited below by the edge of the uncinate process of the ethmoid and above by an elevation named the ethmoid bulla (or ethmoidal bulla); the anterior ethmoidal cells are contained within this bulla and open on or near to it.
The bulla ethmoidalis is caused by the bulging of the anterior ethmoidal cells which open on or immediately above it, and the size of the bulla varies with that of its contained cells. The bulla may be a pneumatised cell or a bony prominence. It is also the largest among anterior ethmoidal cells. When there is a space behind and above the bulla it's called as retrobullar and suprabullar recess . These two recesses together form lateral sinus known as sinus lateralis of grunwald which is bounded superiorly by the skull base.
References
This article incorporates text in the public domain from page 195 of the 20th edition of Gray's Anatomy (1918)
External links
- Anatomy photo:22:os-1115 at the SUNY Downstate Medical Center
- Wright ED, Bolger WE (2001). "The bulla ethmoidalis: lamella or a true cell?". J Otolaryngol. 30 (3): 162–6. doi:10.2310/7070.2001.20206. PMID 11771046.
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