, Volume 37, Issue 2, pp 109–112 | Cite as

MRI of the incisural plane: assessment of normal brain stem position by age and transtentorial brain stem shift in disease

  • J. R. Jinkins
Diagnostic Neuroradiology


The standardization on MRI of an anatomic plane passing through the tectum of the midbrain based on fixed landmarks allows assessment of the position of the brain stem during development and in normal adulthood, and comparison with its position in disease states. The level of the tectum relative to this incisural plane changes during normal cranial growth as well as in the presence of masses, frank brain stem herniation correlating with altered consciousness.

Key words

Brain stem Tentorial hiatus Herniation 


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  1. 1.
    Ono M, Ono M, Rhoton AL, Barry M (1984) Microsurgical anatomy of the region of the tentorial incisura. J Neurosurg 60: 365–399Google Scholar

Copyright information

© Springer-Verlag 1995

Authors and Affiliations

  • J. R. Jinkins
    • 1
  1. 1.Neuroradiology SectionUniversity of Texas Health Science CenterSan AntonioUSA

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