The cerebellum is located in the posterior cranial fossa behind the brain stem. It is connected to the brainstem via three cerebellar peduncles and contains over half of the brain's neurons despite making up only 10% of the total brain volume. The cerebellum coordinates movement and balance and has a laminated appearance due to numerous transverse fissures dividing its surface into lobes and lobules. It receives input from various sources via the peduncles and outputs to deep cerebellar nuclei which connect to motor centers in the thalamus and brainstem.

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 )

7. 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.

8. Inferior cerebellar peduncle :
Connects to medulla.
Contains spinocerebellar tracts and
connections to vestibular nuclei.

9. Superior cerebellar peduncle
Midbrain
Middle cerebellar peduncle
Pons
Inferior cerebellar peduncle
Medulla ablongata

10. Blood supply
Vertebrobasilar circulation
Superior cerebellar artery
Anterior inferior cerebellar artery
Posterior inferior cerebellar artery

12. cerebellum
Consists of two
laterally, large
hemisphere
which are
united by
midline vermis.
Hemisphere
Horizontal fissure
Superior surface
Vermis

13. horizontal fissure
Extends around dorsolateral
border of each hemisphere from
middle cerebellar peduncle to
vallecula, seperating superior and
inferior surface.

14. 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.

15. Horizontal fissure
Primary fissure
Hemisphere

16. Lobes of cerebellam
Anterior lobe
Posterior lobe
Flocculonodular lobe

17. Vermis
Hemisphere
Subdivision of Flocculonodular Lobe
Nodulus
Flocculus
Subdivision of Anterior Lobe
Lingula
Central Lobule
Culmen
Ala Central Lobule
Quadrangular Lobule

19. 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

22. 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

23. Deep cerebrallar nuclei
 Fastigial Nuclei ( medial group )
 Nucleus Interpositus ( intermediate
group )
Globose Nucleus
Emboliform Nucleus
 Dentate Nucleus ( lateral group )

24. Dentate nucleus
Emboliform nucleus
Globose nucleus
Nucleus
interpositus
Fastigial nucleus

25. 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.

26. Dentate nucleus :
Fibers from hemispheric cortex, sends
fibers to red nucleus and thalamus.

28. AXIAL

35. coronal

42. sagittal

49. Thanks to cerebellum!!!