Flashcards in Cerebellum Deck (24):
What are the two groups of axons of the cerebellum?
Mossy and Climbing
What are the main outputs of the cerebellum?
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
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.
What is the cerebellum the roof for?
What are the parts of the cerebellum?
Where do fibers from the ICP go on the cerebellum?
Where do fibers from the MCP go on the cerebellum?
Where do fibers go from the SCP?
To the thalamus and red nucleus
Describe the pathway from the cerebrum to cerebellum through the MCP.
Cerebral Cortex -> Pons -> Synapse at Pontine Nuclei -> MCP -> Cerebellar Cortex
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
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.
What results from damage to the vermis of the cerebellum?
What results from damage to the hemispheres of the cerebellum?
What are the afferent fibers to the ICP?
Inferior olivary nucleus
What are the efferent fibers to the ICP?
What are the afferent fibers to the MCP?
Cerebral Cortex - MCP only has afferent fibers
What are the afferent fibers to the SCP?
Only the VSCT - the rest of the SCP fibers are all efferent
What are the efferent fibers to the SCP?
Deep Cerebellar Nuclei
Describe the input of the cerebellum to the the vestibular nuclei.
Flocculonodular Node -> Fastigial Nucleus -> Vestibular Nuclei
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.
What is the main action of Purkinje cells?
What is the main action of the climbing fibers?