Cerebellum Flashcards Preview

[OS 202] Lecture Exam A > Cerebellum > Flashcards

Flashcards in Cerebellum Deck (21):
1

How many microscopic layers does the cerebellum have?

What are they?

3

Purkinje
Molecular
Granular

2

What are the 2 Inhibitory Interneurons?

Stellate Cell
Basket Cell

3

How many neuron types are found in the Purkinje layer?

One

4

Where do the purkinje neurons receive input from?

Contralateral inferior olivary nucleus via climbing fibers

[Climb the other Olive Tree]

5

What are the most numerous neurons?

Granule Cells (60-80 Billion)

6

Where do Granule cells receive inputs from?

Mossy fibers from the pontine nucle

7

How many Cerebellar Nuclei are there?
What are their names?

4

Dentate
Emboliform
Globose
Fastigial

[Don't Eat Greasy Food: From lateral to midline]

8

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

9

[Cerebellar Input/Output]

Inferior Cerebellar Peduncle

Alternate name and Input/Output?

Restiform body
From Spinal Cord and Lower Brainstem

10

[Cerebellar Input/Output]

Middle Cerebellar Peduncle

Alternate name and Input/Output?

Brachium Pontis
Major afferent fibers from cerebrum and pons

11

[Cerebellar Input/Output]

Superior Cerebellar Peduncle

Alternate name and Input/Output?

Brachium Conjunctivum
Mostly efferent to the thalamus and spinal cord

12

[Cerebellar Input/Output]

Inferior Cerebellar Peduncle
What tracts are used?

1. Dorsal Spinocerebellar Tract
2. Climbing Fibers from Contralateral Inferior Olivary Nuclei
3. Fibers from Purkinje cells -> Vestibular Nuclei

13

[Cerebellar Input/Output]

Middle Cerebellar Peduncle
What tracts are used?

Corticopontocerebellar Tract

14

[Cerebellar Input/Output]

Superior Cerebellar Peduncle
What tracts are used?

Dentatorubrothalamocortical Tract
Cerebellothalamocortical Tract

15

Cerebellum contains _% of Neurons and _% of Total Brain Volume?

50% Neurons
10% TBV

16

Cerebellum developed from?

Rhombomeres

17

Cerebellum receives how many input fibers?

About 200 million

18

Other name of Archicerebellum?
Components?

Vestibulocerebellum
Flocculonodular Lobe and Adjacent Vermis

19

Other name of Paleocerebellum?
Components?

Spinocerebellum
Vermis and intermediate parts of the cerebellar hemisphere

20

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

21

Function: Flocculusnodulus

Coordinating eyeball with neck and trunk