Superior cerebellar artery

The superior cerebellar artery (SCA) arises from the distal basilar artery, just below the posterior cerebral artery (PCA) and typically supplies:

  • whole superior surface of the cerebellar hemispheres down to the great horizontal fissure
  • the superior vermis
  • dentate nucleus
  • most of the cerebellar white matter
  • parts of the midbrain

Although, unlike the anterior inferior cerebellar artery (AICA) and posterior inferior cerebellar artery (PICA) the SCA is rarely absent, it is frequently duplicated:

  • unilateral duplication: 28%
  • bilateral duplication: 8%
  • triplication: 2%

The upper branch, when multiple, may arise from the PCA and usually supplies the vermis, whereas the lower branch supplies the hemisphere.

Segments

  • prepontine segment
  • ambient segment
  • quadrigeminal segment

Branches

  • perforating branches
    • pons
    • midbrain
    • inferior colliculus
  • lateral (marginal) branch
    • largest branch of the SCA
    • usually arises from the ambient segment
    • runs posteriorly in the region of the interhemispheric fissure
    • gives off hemispheric branches that course superiorly over the superior cerebellar hemisphere
  • hemispheric branches
    • arise from the lateral (marginal) branch and from the SCA distal to the origin of the lateral branch also from the ambient segment
    • supplies dentate nucleus
    • superior vermis
    • medial quadrigeminal lobule
    • superior semilunar lobule
  • superior vermian
    • terminal branch(es) of the SCA
    • anastomose with inferior vermian branches of the PICA

Neuroanatomy
Share Article

Article Information

rID: 5013
Section: Anatomy
Synonyms or Alternate Spellings:
  • Superior cerebellar artery (SCA)
  • SCA

Support Radiopaedia and see fewer ads

  • Drag
    Figure 1: posterior fossa vascular territories
    Drag here to reorder.
  • Drag
    Figure 2: superior cerebellum
    Drag here to reorder.
  • Drag
    PICA AICA SCA AP ...
    Figure 3; PICA, AICA and SCA
    Drag here to reorder.
  • Drag
    Figure 4: origin of the cerebellar arteries
    Drag here to reorder.
  • Drag
    Figure 5: duplicated superior cerebellar artery
    Drag here to reorder.
  • Drag
    Case 1: superior cerebellar artery infarct
    Drag here to reorder.
  • Updating… Please wait.
    Loadinganimation

    Alert accept

    Error Unable to process the form. Check for errors and try again.

    Alert accept Thank you for updating your details.