Anatomy of Cerebellum - Dr.Sajith MD RD


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Anatomy of Cerebellum - Dr.Sajith MD RD

  1. 1. Cerebellum Dr.Sajith.S
  2. 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. 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. 4. Surfaces Superior surface ( Tentorial ) Inferior surface ( Suboccipital ) Anterior surface ( Petrosal )
  5. 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. 6. Inferior cerebellar peduncle : Connects to medulla. Contains spinocerebellar tracts and connections to vestibular nuclei.
  7. 7. Superior cerebellar peduncle Midbrain Middle cerebellar peduncle Pons Inferior cerebellar peduncle Medulla ablongata
  8. 8. Blood supply Vertebrobasilar circulation Superior cerebellar artery Anterior inferior cerebellar artery Posterior inferior cerebellar artery
  9. 9. cerebellum Consists of two laterally, large hemisphere which are united by midline vermis. Hemisphere Horizontal fissure Superior surface Vermis
  10. 10. horizontal fissure Extends around dorsolateral border of each hemisphere from middle cerebellar peduncle to vallecula, seperating superior and inferior surface.
  11. 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. 12. Horizontal fissure Primary fissure Hemisphere
  13. 13. Lobes of cerebellam Anterior lobe Posterior lobe Flocculonodular lobe
  14. 14. Vermis Hemisphere Subdivision of Flocculonodular Lobe Nodulus Flocculus Subdivision of Anterior Lobe Lingula Central Lobule Culmen Ala Central Lobule Quadrangular Lobule
  15. 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. 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. 17. Deep cerebrallar nuclei  Fastigial Nuclei ( medial group )  Nucleus Interpositus ( intermediate group ) Globose Nucleus Emboliform Nucleus  Dentate Nucleus ( lateral group )
  18. 18. Dentate nucleus Emboliform nucleus Globose nucleus Nucleus interpositus Fastigial nucleus
  19. 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. 20. Dentate nucleus : Fibers from hemispheric cortex, sends fibers to red nucleus and thalamus.
  21. 21. AXIAL
  22. 22. coronal
  23. 23. sagittal
  24. 24. Thanks to cerebellum!!!