Suprameatal triangle | |
---|---|
![]() Relations of the
brain and
middle meningeal artery to the surface of the
skull. 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 the
middle meningeal artery. C. Suprameatal triangle. D. Sigmoid bend of the
transverse sinus. E. Point for trephining over the straight portion of the
transverse sinus, exposing
dura mater of both
cerebrum and
cerebellum. Outline of
cerebral hemisphere indicated in blue; course of
middle 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 the
temporal bone, between the posterior wall of the
external acoustic meatus and the posterior root of the
zygomatic process is the area called the suprameatal triangle, suprameatal pit, mastoid fossa, foveola suprameatica, or
Macewen's triangle, through which an instrument may be pushed into the
mastoid 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 a
cortical mastoidectomy.
The triangle lies deep to the cymba conchae.
This article incorporates text in the
public domain from
page 140 of the 20th edition of
Gray's Anatomy (1918)
Suprameatal triangle | |
---|---|
![]() Relations of the
brain and
middle meningeal artery to the surface of the
skull. 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 the
middle meningeal artery. C. Suprameatal triangle. D. Sigmoid bend of the
transverse sinus. E. Point for trephining over the straight portion of the
transverse sinus, exposing
dura mater of both
cerebrum and
cerebellum. Outline of
cerebral hemisphere indicated in blue; course of
middle 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 the
temporal bone, between the posterior wall of the
external acoustic meatus and the posterior root of the
zygomatic process is the area called the suprameatal triangle, suprameatal pit, mastoid fossa, foveola suprameatica, or
Macewen's triangle, through which an instrument may be pushed into the
mastoid 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 a
cortical mastoidectomy.
The triangle lies deep to the cymba conchae.
This article incorporates text in the
public domain from
page 140 of the 20th edition of
Gray's Anatomy (1918)