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Cerebellum · IX · substructure

Lobule IX (Tonsil)

Tonsilla cerebelli (IX)

A posterior lobe region connected with the default mode network; its hemispheric part is the cerebellar tonsil.

Anatomy

  • Its hemispheric part is the tonsil and its vermal part the uvula (the uvula is in the posterior vermis in the model); just above the foramen magnum.

Functions

  • The cerebellar representation of the default mode network (Buckner et al., 2011).

Clinical

  • Chiari malformation type I: the tonsils extend below the foramen magnum; headache, sleep apnea, difficulty swallowing.

In the model

How this structure is defined in the 3D model, and the data source.

SUIT atlas (Diedrichsen et al., 2009) lobule labels; each point of the cerebellar surface was assigned to the nearest lobule just beneath it. Overlap between SUIT and the model’s cerebellum: Dice 0.90.

References

Full citations for the card; links go to the paper (DOI) or a PubMed search.

  1. Buckner RL et al. The organization of the human cerebellum estimated by intrinsic functional connectivity. J Neurophysiol 2011;106(5):2322–2345. DOI: 10.1152/jn.00339.2011

This page is for education; it must not be used on its own for diagnosis or treatment decisions.

Last reviewed by the author: 12 October 2026

3D model: built from the MNI ICBM152 average brain and the CerebrA, HCP-MMP1.0, CIT168, Harvard AAN, SUIT and Najdenovska thalamus atlases. License details in the atlas.