Cerebellum Flashcards
How many microscopic layers does the cerebellum have?
What are they?
3
Purkinje
Molecular
Granular
What are the 2 Inhibitory Interneurons?
Stellate Cell
Basket Cell
How many neuron types are found in the Purkinje layer?
One
Where do the purkinje neurons receive input from?
Contralateral inferior olivary nucleus via climbing fibers
[Climb the other Olive Tree]
What are the most numerous neurons?
Granule Cells (60-80 Billion)
Where do Granule cells receive inputs from?
Mossy fibers from the pontine nucle
How many Cerebellar Nuclei are there?
What are their names?
4
Dentate
Emboliform
Globose
Fastigial
[Don’t Eat Greasy Food: From lateral to midline]
All fibers to and from the cerebellum pass through the deep nuclei, except for?
Fibers from the flocculonodular lobe which synapse directly on the vestibular nuclei
[Cerebellar Input/Output]
Inferior Cerebellar Peduncle
Alternate name and Input/Output?
Restiform body
From Spinal Cord and Lower Brainstem
[Cerebellar Input/Output]
Middle Cerebellar Peduncle
Alternate name and Input/Output?
Brachium Pontis
Major afferent fibers from cerebrum and pons
[Cerebellar Input/Output]
Superior Cerebellar Peduncle
Alternate name and Input/Output?
Brachium Conjunctivum
Mostly efferent to the thalamus and spinal cord
[Cerebellar Input/Output]
Inferior Cerebellar Peduncle
What tracts are used?
- Dorsal Spinocerebellar Tract
- Climbing Fibers from Contralateral Inferior Olivary Nuclei
- Fibers from Purkinje cells -> Vestibular Nuclei
[Cerebellar Input/Output]
Middle Cerebellar Peduncle
What tracts are used?
Corticopontocerebellar Tract
[Cerebellar Input/Output]
Superior Cerebellar Peduncle
What tracts are used?
Dentatorubrothalamocortical Tract
Cerebellothalamocortical Tract
Cerebellum contains _% of Neurons and _% of Total Brain Volume?
50% Neurons
10% TBV
Cerebellum developed from?
Rhombomeres
Cerebellum receives how many input fibers?
About 200 million
Other name of Archicerebellum?
Components?
Vestibulocerebellum
Flocculonodular Lobe and Adjacent Vermis
Other name of Paleocerebellum?
Components?
Spinocerebellum
Vermis and intermediate parts of the cerebellar hemisphere
Brachium Conjunctivum is mainly afferent/efferent?
Where does it send inputs to? What’s the pathway?
Efferent
Sends inputs to the thalamus and spinal cord
Denate Nucleus -> Midbrain -> Thalamus
Function: Flocculusnodulus
Coordinating eyeball with neck and trunk
