Last revised by Josef Kusayev on 22 Mar 2022

The vermis (pl: vermes) of the cerebellum is an unpaired medial structure that separates the cerebellar hemispheres. Its anatomy broadly follows that of the cerebellar hemispheres. 

Gross anatomy

The vermis is separated into a small anterior lobe and a much larger posterior lobe by the primary fissure. It can be further subdivided into nine lobules which are formed by groups of folia (sing: folium) that correspond to paired cerebellar hemisphere lobules. These are subject to variability in terms of their size, shape and number of folia 1-4.

  • anterior lobe
    • lingula
    • central lobule
    • culmen
  • primary (tentorial) fissure
  • posterior lobe
    • declive
    • folium
    • horizontal (petrosal) fissure
    • tuber
    • prebiventral/prepyramidal (suboccipital) fissure
    • pyramid
    • uvula
  • flocculonodular lobe
    • nodulus

A helpful mnemonic to remember the lobules of the vermis can be found here

Related pathology

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Cases and figures

  • Figure 1
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