Anatomy of Cerebellum - Dr.Sajith MD RD
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Anatomy of Cerebellum - Dr.Sajith MD RD






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Anatomy of Cerebellum - Dr.Sajith MD RD Presentation Transcript

  • 1. Cerebellum Dr.Sajith.S
  • 2. The term cerebellum is from “Latin meaning” the little brain. It is a part of the hindbrain situated in the posterior cranial fossa. only 10 % total volume of the brain but more than half of all its neurons. It is present behind the Pons and medulla oblongata , separated by fourth ventricle.
  • 3. • It is covered by tentorium cerebelli and connected to brain stem by three cerebellar peduncles. • Surface is divided by numerous curve transverse fissures giving it a laminated appearance.
  • 4. Surfaces Superior surface ( Tentorial ) Inferior surface ( Suboccipital ) Anterior surface ( Petrosal )
  • 5. peduncles Superior cerebellar peduncle :  Connects to midbrain.  Contains efferent fiber systems extending to red nucleus and thalamus. Middle cerebellar peduncle :  Connects to pons  Contains fiber mass orginating from pontine nuclei and represent continuation of corticopontine tracts.
  • 6. Inferior cerebellar peduncle : Connects to medulla. Contains spinocerebellar tracts and connections to vestibular nuclei.
  • 7. Superior cerebellar peduncle Midbrain Middle cerebellar peduncle Pons Inferior cerebellar peduncle Medulla ablongata
  • 8. Blood supply Vertebrobasilar circulation Superior cerebellar artery Anterior inferior cerebellar artery Posterior inferior cerebellar artery
  • 9. cerebellum Consists of two laterally, large hemisphere which are united by midline vermis. Hemisphere Horizontal fissure Superior surface Vermis
  • 10. horizontal fissure Extends around dorsolateral border of each hemisphere from middle cerebellar peduncle to vallecula, seperating superior and inferior surface.
  • 11. Primary fissure The deepest fissure in the vermis is primary fissure, which curves ventrolaterally in the superior surface of the cerebellum to meet horizontal fissure. Primary fissure divides the cerebellum into anterior and posterior lobe.
  • 12. Horizontal fissure Primary fissure Hemisphere
  • 13. Lobes of cerebellam Anterior lobe Posterior lobe Flocculonodular lobe
  • 14. Vermis Hemisphere Subdivision of Flocculonodular Lobe Nodulus Flocculus Subdivision of Anterior Lobe Lingula Central Lobule Culmen Ala Central Lobule Quadrangular Lobule
  • 15. Vermis Hemisphere Subdivision of Posterior Lobe Declive Folium Simple Lobule Superior Semilunar Lobule Horizontal fissure Tuber Inferior Semilunar Lobule Gracile Lobule Prepyramidal fissure Pyramid Uvula Biventral Lobule Tonsil
  • 16. Arbor vitae Arbor vitae cerebelli In latin “ tree of life” It is so called because of the tree like appearance. It is the white matter of the cerebellum. It brings sensory and motor sensation to and from cerebellum. Fourth ventricle
  • 17. Deep cerebrallar nuclei  Fastigial Nuclei ( medial group )  Nucleus Interpositus ( intermediate group ) Globose Nucleus Emboliform Nucleus  Dentate Nucleus ( lateral group )
  • 18. Dentate nucleus Emboliform nucleus Globose nucleus Nucleus interpositus Fastigial nucleus
  • 19. Fastigial nucleus : Fibers from vermis cortex , vestibular nuclei and other medulla nuclei. Globose nucleus : Fibers from vermis cortex, sends fibers to medulla nuclei. Emboliform nucleus : Fibers from cerebellar cortex between vermis and hemispheres, sends fibers to thalamus.
  • 20. Dentate nucleus : Fibers from hemispheric cortex, sends fibers to red nucleus and thalamus.
  • 21. AXIAL
  • 22. coronal
  • 23. sagittal
  • 24. Thanks to cerebellum!!!