Superior cerebellar peduncle

The superior cerebellar peduncles (SCP) are a paired white matter fibre tracts that connect the cerebellum with the midbrain. The SCP contains vital afferent and efferent fibres including cerebellothalamic, cerebellorubral and ventrospinocerebellar tracts.

The superior cerebellar peduncles decussate centrally in the ventral midbrain at the level of the inferior colliculi. Diffusion tensor imaging (DTI) enables depiction of the SCP decussation and on the colour-coded fractional anisotropy map this is seen as a red dot in the ventral midbrain (conventionally, red denote transversely-oriented fibres).

The thin superior medullary velum is suspended between the two peduncles.

The superior cerebellar peduncles receive their arterial blood supply through branches of the superior cerebellar artery.

Clinically superior cerebellar peduncular decussation is relevant in congenital anomalies of the posterior fossa in particular in Joubert syndrome where the SCP decussation is absent.

Anatomy: Brain
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Article information

rID: 45542
Section: Anatomy
Synonyms or Alternate Spellings:
  • Superior cerebellar peduncles
  • SCP (superior cerebellar peduncle)

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Cases and figures

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    Figure 1: decussation of SCP on DTI
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