====== Cerebellar vermis ======


{{ ::cerebellartonsil.jpg?400|}}

The [[cerebellum]] median portion is constricted, and is called the [[vermis]], from its annulated appearance which it owes to the transverse ridges and furrows upon it; the lateral expanded portions are named the [[cerebellar hemisphere]]s.

see [[Tuber vermis]].

The [[inferior vermis]] lies in a deep vertical depression in the [[suboccipital]] surface called the [[posterior cerebellar incisura]], which also contains the [[falx cerebelli]]. The [[inferior vermis]] forms the posterior cortical surface within this [[incisura]]. In contrast, the [[superior vermis]] is the highest point on the [[cerebellum]], occupying the space under the [[straight sinus]] where the tentorial leaflets intersect with the [[falx cerebri]]. The superior vermis slopes downward from its apex anteriorly to the posterior cerebellar incisura. The tentorial part of the vermian surface includes (from anterior to posterior) the [[culmen]], [[declive]], and [[folium]]. The suboccipital part of the vermian surface includes (from superior to inferior) the [[tuber]], [[pyramid]], [[uvula]], and [[nodule]]. The nodule is hidden deep to the uvula.

===== Pathology =====
[[Group 4 medulloblastoma]] is one of the most common [[pediatric brain tumor]]s. They are the most common [[medulloblastoma]] group (followed by [[Group 3 medulloblastoma]], [[Medulloblastoma, SHH-activated]], and [[Medulloblastoma, WNT-activated]]), and typically arise from the [[Cerebellar vermis]].