Sphenoid sinus
| 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 | |
The sphenoid sinus is a paired paranasal sinus in the body of the sphenoid bone. It is one pair of the four paired paranasal sinuses. The two sphenoid sinuses are separated from each other by a septum. 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.