Tentorial angle

The tentorial angle is measured between a line connecting the nasion with the tuberculum sellae and the the angle of the straight sinus. Normally it should measure between 27 and 52 degrees.

Abnormalities of the posterior fossa / base of skull can alter this. For example this angle is elevated in achondroplasia.

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Article Information

rID: 7891
Section: Approach
Synonyms or Alternate Spellings:
  • Tentorial angles

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    Figure 1: normal
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    Figure 2: abnormal
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