Mid brain 🧠

1. Cerebellum
Dr. Aamir

4. Cerebellum
• The largest part of hind brain and major center of
receiving the information from cerebral cortex and from
whole body is named as cerebellum.
• The major information it receives from body is of
Proprioception.
• It acts as a guide of cerebral cortex to execute a movement.

5. Basic Function of Cerebellum
•Three Basic function are there of
cerebellum,
1.To Maintain Tone in the muscles
2.Balance and Posture Maintenance
3.Co-ordination of Movement

7. Location of its presence
•Posterior to Brain Stem.
•Inferior to cerebrum and tentorium Cerebelli.

9. Connections to Brain Stem
• By Bundles of axons or nerve fibers cerebellum is connected to brain
stem, these bundles of axons are called as Cerebellar Peduncles.
1. For Connection of Mid Brain with Cerebellum = Superior Cerebellar
Peduncles
2. For Connection of Pons with Cerebellum = Middle Cerebellar
Peduncles
3. For Connection of Medulla Oblongata with Cerebellum = Inferior
Cerebellar Peduncles

11. Gross Anatomy of Cerebellum

13. Gross Structure of Cerebellum
•Grossly cerebellum has two halves called as
Cerebellar Hemispheres.
•One is Right and One is Left Cerebellar
Hemisphere.

14. Vermis
• Two Halves are joined by a narrow depression in middle. This part is called
as Vermis.
• Because it looks like a worm

16. Surface View Of Cerebellum

17. Surface View of Whole Cerebellum
• Various Folds are present on the surface of
cerebellum. These folds are called as Folia.

20. Fissures on the Surface of Cerebellum
• Total 3 Fissures are present.
• Two main and one less important fissures are present on the surface of cerebellum.
• Two main fissures are,
1. Primary Fissure
2. Uvulonodular Fissure or Posterolateral Fissure
• Less important one is
• Horizontal Fissure

23. Anatomical Division of Cerebellum
• Two main fissure divide the whole cerebellum into
three lobes.
1. Anterior Lobe
2. Middle lobe or Posterior Lobe
3. Flocculonodular Lobe

25. Anterior Lobe
•That lobe which lies superior to primary
fissure is called as Anterior Lobe.
•Mainly this lobe is associated with tone in the
muscles.

28. Posterior or Middle Lobe
• That lobe which lies between primary fissure and
Uvulonodular fissure is middle lobe or posterior
lobe.
• This lobe is associated with Coordination of
movement and planning of movement .

30. Flocculonodular lobe
• This is the most primitive or older lobe.
• The lobe which lies inferior to Uvulonodular
fissure is named as Flocculonodular lobe.
• This lobe is associated with Balance and posture
maintenance.

31. Histological View

33. Histological Structure
• Microscopically,
• The cerebellum has three main parts,
1. Cerebellar Cortex (outer gray matter)
2. White Matter
3. Deep Cerebellar Nuclei

34. Cerebellar Cortex
• It is gray matter, so it is made up of cell bodies.
• Three layers of cell are present in the cerebellar cortex,
• My = Molecular Layer (Basket Cells)
• Personal = Purkinje Layer (Purkinje Cells)
• Gang = Granular Layer (Golgi Cells)

36. Deep Cerebellar Nuclei
• 4 Deep Cerebellar Nuclei are present in each hemisphere.
1. Dentate Nucleus
2. Emboliform Nucleus
3. Globose Nucleus
4. Fastigial Nucleus

39. Thank You