Internal configuration

Cerebellar cortex

• Layer of grey matter
• Two millimeters thick
• Stops at the level of the cerebellar peduncles

Medullary Body

• White matter
• All the myelinated fibres running through the cerebellar peduncles

Cerebellar nuclei

Symmetrical nuclei within the white matter

• Dentate nuclei
  • Within the medial part of the cerebellar hemisphere
  • Resembles a folded purse that opens forward and laterally
• Interposed nuclei
  • Lie medially to the dentate nucleus
  • Composed of the globose nucleus and the emboliform nucleus
• Fastigial nucleus
  • Irregular, sometimes indented, with a large anteroposterior axis
  • The most medial of the cerebellar nuclei
  • Vermian formation
  • The front end is separated from the contralateral fastigial nucleus by a layer of white matter
  • The back ends of both fastigial nuclei are united to each other by a grey commissure