cellular level of the cerebellum

Question 1

cellular level of the cerebellum

Answer 1

the cortex has three layers which run from the surface of the brain down to the white matter

Question 2

what are the layers of the cortex

Answer 2

molecular
purkinje
granular

Question 3

• both considered to be interneurons

- get input from the parallel fibers and inhibit the purkinje cells

Answer 3

basket and stellate cells

Question 4

• found more superficially
• closer to the surface
• send axons to the distal portions of the purkinje cells

Answer 4

stellate cells

Question 5

• more proximal

- form “baskets” around the cell bodies of the purkinje cells

Answer 5

basket cells

Question 6

• only one cell thick
• the cell dendrites are wide and flat and lined-up sideways
• they run perpendicular to the layers
• the dendrites are regular and are easy to trace
• the dendrites are 1-1.5 mm in length
• the only ones that lead out of the cortex to the cerebellar nuclei
• sometimes they’re called the “output cells” of the cerebellum
• all other cells are intrinsic neurons

Answer 6

purkinje layer

Question 7

• this layer contains golgi cells and granular cells that send axons outward into the molecular layer
• the granular cells are very small
• the golgi cells send dendrites into the molecular layer and synapse on the parallel fibers
• they have extensive dendritic arborization and work in terms of a feedback loop
• they are excitatory to the parallel fibers and inhibitory to the granular cells so they are getting info from the parallel fibers and working on the granular cells

Answer 7

granular layers

Question 8

the cerebellum is extremely __________

Answer 8

organized

Question 9

there is no ________ in the cerebellum system

Answer 9

deviation

Question 10

these cells are very regular and easy to trace

Answer 10

purkinje cells