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Flashcards in Cerebellum Deck (24):
1

What are the two groups of axons of the cerebellum?

Mossy and Climbing

2

What are the main outputs of the cerebellum?

Red Nucleus
Thalamus

3

Through what does information get out from the cerebellum?

Information comes out from the superior cerebellar peduncle and it is a route entirely for efferent fibers except for the VSCT which comes in through the SCP

4

Through what does information get into the cerebellum?

It gets into the cerebellum through the inferior and middle cerebellar peduncle. The ICP is the main route though.

5

What is the cerebellum the roof for?

4th Ventricle

6

What are the parts of the cerebellum?

Vermis
Medial Hemisphere
Lateral Hemisphere

7

Where do fibers from the ICP go on the cerebellum?

Floccularnodular Node

8

Where do fibers from the MCP go on the cerebellum?

Lateral Hemisphere

9

Where do fibers go from the SCP?

To the thalamus and red nucleus

10

Describe the pathway from the cerebrum to cerebellum through the MCP.

Cerebral Cortex -> Pons -> Synapse at Pontine Nuclei -> MCP -> Cerebellar Cortex

11

Describe the pathway from the inferior olive to cerebellum through the ICP.

Inferior Olive -> ICP -> Cerebellar Cortex

Other Pathways through the ICP

DSCT and CCT -> ICP -> Cerebellar Cortex
Vestibular and Cochlear Nuclei -> ICP -> Cerebellar Cortex

12

What is the difference between cerebral cortex damage versus cerebellar damage?

Cerebellar damage causes problems on the same side whereas cerebral damage often causes problems on the opposite side.

13

What results from damage to the vermis of the cerebellum?

Trunk problems

14

What results from damage to the hemispheres of the cerebellum?

Limb problems

15

What are the afferent fibers to the ICP?

Inferior olivary nucleus
Vestibular nuclei
Spinal cord
Trigeminal nuclei
Reticular formation

16

What are the efferent fibers to the ICP?

Vestibular nuclei

17

What are the afferent fibers to the MCP?

Cerebral Cortex - MCP only has afferent fibers

18

What are the afferent fibers to the SCP?

Only the VSCT - the rest of the SCP fibers are all efferent

19

What are the efferent fibers to the SCP?

Deep Cerebellar Nuclei

20

Describe the input of the cerebellum to the the vestibular nuclei.

Flocculonodular Node -> Fastigial Nucleus -> Vestibular Nuclei

21

What are Purkinje cells?

They are the only axons that leave the cerebellar cortex. Purkinje cells send inhibitory projections to the deep cerebellar nuclei, and constitute the sole output of all motor coordination in the cerebellar cortex.

22

What is the main action of Purkinje cells?

Inhibitory

23

What is the main action of the climbing fibers?

Excitatory

24

What gives rise to climbing fibers?

Inferior Olivary Nucleus