The term cerebellum is from “Latin
meaning” the little brain. It is a part of the
hindbrain situated in the posterior cranial
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.
• It is covered by tentorium cerebelli and
connected to brain stem by three
• Surface is divided by numerous curve
transverse fissures giving it a laminated
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
Inferior cerebellar peduncle :
Connects to medulla.
Contains spinocerebellar tracts and
connections to vestibular nuclei.
Consists of two
Extends around dorsolateral
border of each hemisphere from
middle cerebellar peduncle to
vallecula, seperating superior and
The deepest fissure in the vermis is
primary fissure, which curves
ventrolaterally in the superior surface
of the cerebellum to meet horizontal
Primary fissure divides the
cerebellum into anterior and
Arbor vitae Arbor vitae cerebelli
In latin “ tree of life”
It is so called because
of the tree like
It is the white matter
of the cerebellum.
It brings sensory and
to and from
Deep cerebrallar nuclei
Fastigial Nuclei ( medial group )
Nucleus Interpositus ( intermediate
Dentate Nucleus ( lateral group )
Fastigial nucleus :
Fibers from vermis cortex , vestibular
nuclei and other medulla nuclei.
Globose nucleus :
Fibers from vermis cortex, sends fibers to
Emboliform nucleus :
Fibers from cerebellar cortex between
vermis and hemispheres, sends fibers to
Dentate nucleus :
Fibers from hemispheric cortex, sends
fibers to red nucleus and thalamus.