Superior cerebellar artery

A.Prof Frank Gaillard et al.

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

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
Anatomy: Brain
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Article information

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

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Cases and figures

  • Figure 1: posterior fossa vascular territories
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  • Figure 2: common variants of the circle of Willis: diagrams
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  • Figure 2: superior cerebellum
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  • Figure 4: origin of the cerebellar arteries
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  • Figure 5: PICA, AICA and SCA
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  • Case 1: superior cerebellar artery infarct
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