Bogart's angle is an angular indicator of craniovertebral relations. The angle of Bogart corresponds to the angle of entry of the posterior cranial fossa . Formed by the tubercle of the Turkish saddle, basion and opistinion.
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 | Bogart's angle . In the figure: O is the opistinion, B is the basion, C is the most protruding upper-back point of the back of the Turkish saddle, angle 3 is the Bogart angle. |
It is named after the Dutch scientist Johannes Bogart ( Dutch Johannes Adrianus Boogart ; 1823 - 1877 ), who published a paper on platybasia [1] , describing this craniovertebral relationship [2] .
The study of the Bogart angle begins with a search on the craniogram of the following points:
- Bazion - the front edge of the large occipital foramen;
- Opistinion is the posterior edge of the large occipital foramen;
- The most protruding upper-back point of the back of the Turkish saddle.
Between the basion and the opistinion, a line is drawn, the so-called "Mac-Ray Line". From the most protruding upper-back point of the back of the Turkish saddle to the basion, the "Slope Line" is drawn.
The Bogart angle is the angle between the McRae line and the ramp line [3] .
According to various sources, the norm of the Bogart angle is from 120 to 135 degrees [3] [4] .
With platybasia, an increase in the Bogart angle occurs [5] .
Notes
- ↑ Boogart, JA: De Indrukking der Groundvlakte van den Schedel door de Weraelkolom, hare Oorzaken en Gevolgen , Nederl.Tysdchr.Geneesk., 2: 81-108. 1865
- ↑ Robert A. Koenigsberg and al. Evaluation of Platybasia with MR Imaging American journal of neuroradiology
- ↑ 1 2 Method for the diagnosis of diseases of the craniovertebral region . Borisova A.I .; Stysina E.E .; Belyanina T.N.
- ↑ radiopaedia.org - Boogards angle
- ↑ Novikova L.B., Akopyan A.P., Gaynanov A.F. Cranio-vertebral anomalies in the outpatient practice of a neurologist