| Suprameatal triangle | |
|---|---|
 Relations of thebrain andmiddle meningeal artery to the surface of theskull. 1.Nasion. 2.Inion. 3.Lambda. 4.Lateral cerebral fissure. 5.Central sulcus. AA.Reid's base line. B. Point for trephining the anterior branch of themiddle meningeal artery. C. Suprameatal triangle. D. Sigmoid bend of thetransverse sinus. E. Point for trephining over the straight portion of thetransverse sinus, exposingdura mater of bothcerebrum andcerebellum. Outline ofcerebral hemisphere indicated in blue; course ofmiddle meningeal artery in red. | |
 Macewan's suprameatal triangle | |
| Details | |
| Identifiers | |
| Latin | foveola suprameatica |
| TA98 | A02.1.06.069 |
| TA2 | 710 |
| FMA | 54960 |
| Anatomical terms of bone | |
In thetemporal bone, between the posterior wall of theexternal acoustic meatus and the posterior root of thezygomatic process is the area called thesuprameatal triangle,suprameatal pit,mastoid fossa,foveola suprameatica, orMacewen's triangle, through which an instrument may be pushed into themastoid antrum.
In the adult, the antrum lies approximately 1.5 to 2 cm deep to the suprameatal triangle. This is an important landmark when performing acortical mastoidectomy.The triangle lies deep to the cymba conchae.
This article incorporates text in thepublic domain frompage 140 of the 20th edition ofGray's Anatomy(1918)
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