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Topic

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Tuber of vermis

The Tuber of Vermis is a prominent portion of the inferior vermis of the cerebellum, situated posteriorly and centrally between the cerebellar hemispheres. It forms the most posterior part of the inferior vermis and plays a significant role in integrating sensory and motor signals for coordinated movement. The tuber is anatomically continuous with the hemispheric cerebellar lobules known as the inferior semilunar lobule (also called the tuber lobule). Its location and structure are important in clinical neuroradiology and neuropathology due to its involvement in various cerebellar disorders.

Synonyms

  • Tuber vermis

  • Tuber of inferior vermis

  • Lobulus tuberis (Latin)

  • Tuber lobule (when referencing its hemispheric extension)

  • Lobulus semilunaris inferior (adjacent structure)

Arterial Supply

  • Mainly supplied by branches of the posterior inferior cerebellar artery (PICA)

  • May also receive contributions from the superior cerebellar artery (SCA)

  • Occasional small branches from the anterior inferior cerebellar artery (AICA)

Venous Supply

  • Drained by the inferior cerebellar veins

  • Ultimately empties into the straight sinus and transverse sinus via the cerebellar veins

Function

  • Integral to the coordination of trunk and proximal limb movements

  • Contributes to posture and balance by processing proprioceptive information

  • Plays a role in integration of sensory input with motor commands, essential for fine-tuning voluntary movements

MRI Appearance

  • On T1-weighted images: Appears as a region of intermediate (gray matter) signal intensity, indistinguishable from the rest of the cerebellar vermis except by anatomical location

  • On T2-weighted images: Slightly hyperintense compared to white matter, similar to other cerebellar gray matter structures

  • Anatomical identification: Appears as the central, posterior segment of the inferior vermis, bordered laterally by the cerebellar hemispheres

  • Pathological changes: Atrophy, lesions, or mass effect in this region may indicate cerebellar disorders such as ataxias, tumors, or infarcts

CT Appearance

  • Non-contrast CT: Appears as a midline structure of similar density to the rest of the cerebellar cortex (isodense to brain parenchyma)

  • Contrast-enhanced CT: No significant enhancement under normal conditions

  • Visualization: Can be subtle and often best seen in the context of surrounding cerebellar anatomy

  • Pathology: May appear hypodense in cases of infarction or atrophy, and hyperdense in the presence of calcifications or hemorrhage

MRI images

Tuber of vermis mri 3t coronal image

MRI images

Tuber of vermis mri 3t sagittal image

CT image

Tuber of vermis CT axial anatomy image -img-00001-00001