Sphenoid sinus
The sphenoid sinus is a paired paranasal sinus occurring within the body of the sphenoid bone. It represents one pair of the four paired paranasal sinuses. The pair of sphenoid sinuses are separated in the middle by a septum of sphenoid sinuses. Each sphenoid sinus communicates with the nasal cavity via the opening of sphenoidal sinus.: 500 The two sphenoid sinuses vary in size and shape, and are usually asymmetrical.
| Sphenoid sinus | |
|---|---|
Lateral wall of nasal cavity; the three nasal conchæ have been removed. (Sphenoidal sinus visible at upper right, in dark circle.) | |
Nose and nasal cavities. (Sphenoid sinus labeled at upper right.) | |
| Details | |
| Nerve | posterior ethmoidal nerves, and orbital branches of the pterygopalatine ganglion |
| Identifiers | |
| Latin | sinus sphenoidalis |
| MeSH | D013101 |
| TA98 | A06.1.03.003 |
| TA2 | 3178 |
| FMA | 54683 |
| Anatomical terms of bone | |
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