Vermian lobulation

Evaluation of vermian lobulation is essential in assessment of the vermian maturity. MRI is a useful tool in assessment of the fetal posterior fossa.

Normal Vermian lobulation by weeks 1:
  • By 21 weeks - Prepyramidal fissure can be seen between the tuber and pyramis.
  • 21 to 22 weeks - Preculminate fissure can be seen in between the central lobule and culmen.
  • 24 weeks - Secondary fissure can be seen between the pyramis and uvula
  • From 27 weeks - all vermian lobules and fissures become visible
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Article information

rID: 57164
Section: Anatomy
Synonyms or Alternate Spellings:
  • vermis developement

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