Uncinate process of ethmoid bone
Processus uncinatus ossis ethmoidei
- Related terms: Uncinate process
Definition
The uncinate process of ethmoid bone is a small, thin bony projection that stretches backward from the bottom of the ethmoidal labyrinth. It lies beneath the ethmoidal bulla and eventually joins with the inferior nasal concha. This creates a curved channel known as the semilunar hiatus, which serves as a drainage pathway for several paranasal air sinuses, including the maxillary sinus, frontal sinus, and anterior ethmoidal air cells.
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. 1016 & Fig. 8.221B (coronal section).
