Bony ethmoidal bulla - Oral cavity - Cross sections - e-Anatomy
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Bony ethmoidal bulla

Bulla ethmoidea ossea

  • Latin synonym: Bulla ethmoidalis ossea
  • Related terms: Ethmoidal bulla

Definition

The bony ethmoidal bulla is a raised area located above the edge of the uncinate process of the ethmoid bone in the middle meatus region of the lateral wall of the nasal cavity. It creates a curved opening called the hiatus semilunaris underneath it. This opening is bordered above by the bulla and below by the lower edge of the uncinate process of the ethmoid bone. The ethmoid bulla contains the middle ethmoidal cells, which usually open onto the surface of the bulla. The size of the bony ethmoidal bulla varies depending on the size of the cells it contains.

References

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Text written by Muhammad A. Javaid, MD, PhD © 2024 IMAIOS.

  • Drake, R.L., Vogl, A.W. and Mitchell, A.W.M. (2009). ‘Chapter 8: Head and Neck’ in Gray’s anatomy for Students. (2nd ed.) Philadelphia PA 19103-2899: Elsevier, pp. 1022.

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