1. DEVELOPMENT OF METENCEPHALON

2. MOTOR AND SENSORY NUCLEI
 Som. efferent: CN VI
 SVE: motor nuclei of CN V and CN VII
 GVE: Sublingual and submandibular gland
 …………………………
 SA: CN VIII,CN V
 SVA:
 GVA:

3. CEREBEELUM

4. RHOMBIC LIPS
 Dorsolateral part of alar plate bends medially to
form rhombic lips
 POSITION:
 Caudally: widely seperated
 Just below the mesencephalon: approach each
other in the midline

5. CEREBELLAR PLATE
 With further deepening of pontine flexure, rhombic
lips are compressed craniocaudally to form
cerebellar plate

6.  VERMIS: a midline tubercle appear on c.plate
 CEREBELLAR HEMISPHERES: one on each side
of vermis
 TRANSVERSE FISSURE: seperates nodule from
vermis and flocculus from cerebellar hemispheres

7. LAYERS OFCEREBELLUM
 Initially:
 Neuroepithelial layer, Mantle layer, Marginal layer
 EXTERNAL GRANULAR LAYER OF
CEREBELLUM:
A number of cells produced from neuroepi layer
migrate towards the surface and form this layer.
+ Cells of this layer retain their ability to divide and
form a proliferative zone in cerebellum

8.  GRANULE CELLS: cells of ext.granular layer form
a variety of cells which migrate towards
differentiating purkinje cells to form granule cells.
 BASKET AND STELLATE CELLS: formed in white
matter of sp.cord

9. CELLS OF CEREBELLAR CORTEX(REACH
THEIR DEFINITIVE SIZE AFTER BIRTH)
 Purkinje cells
 Golgi II cells
 External granular cells

10. DEEP NUCLEI(REACH THEIR FINAL DEFINITIVE
POSITION BEFORE BIRTH)
 Dentate nucleus