BCN Chapter 9

Question 1

What are the 3 anatomic subdivisions of the cerebellum?

Answer 1

Anterior lobe
Posterior Lobe
Flocculonodular lobe

Question 2

What does the inferior cerebellar peduncle connect?

Answer 2

Dorsolateral medulla to cerebellum

Question 3

Is the inferior cerebellar peduncle primarily input or output?

Answer 3

Input (very little output)

Question 4

What does the middle cerebellar peduncle connect and is it input or output?

Answer 4

Basilar pons to cerebellum

Only input

Question 5

What are the 3 layers of the folium?

Answer 5

Molecular layer (large amounts of purkinje dendritic trees)
Purkinje cell layer (single row of huge neurons)
Granular layer (numerous densely packed, small granule cells and soma of Golgi neurons)

Question 6

Does the cerebellum have more afferent or efferent fibers?

Answer 6

40x more afferent

Question 7

What are the 2 main differences of the cerebellum from the cerebral cortex?

Answer 7

There’s no activity directly contributing to consciousness

Hemispheres possess ipsilateral representation of body parts

Question 8

How many neurons do mossy and climbing fibers synapse on?

Answer 8

Mossy - synapse on 1 neuron (simple spike)

Climbing - synapse on multiple neurons (complex spike)

Question 9

What are the only excitatory cells in the cerebellar cortex?

Answer 9

Granule cells through glutamate

Question 10

Which type of spike is involved with correction and learning?

Answer 10

Complex Spikes