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Cerebellar Anatomy 01

Topic: Anatomy

Created on Saturday, March 3 2007 by jdmiles

Last modified on Saturday, March 3 2007.

In the cerebellum, parallel fibers arise from:

 
        A) Stellate cells
 
        B) Basket cells
 
        C) Granule cells
 
        D) Climbing fibers
 
        E) Purkinje cells
 

 


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This question was created on March 03, 2007 by jdmiles.
This question was last modified on March 03, 2007.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS




A) Stellate cells

This answer is incorrect.


Stellate cells do not give rise to parallel fibers. Stellate cells are types of inhibitory interneurons. They receive input from parallel fibers, and synapse onto Purkinje cells.  (See References)

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B) Basket cells

This answer is incorrect.


Basket cells do not give rise to parallel fibers. Basket cells are inhibitory interneurons in the cerebellar cortex. Their axons make "basket-like" arborizations around Purkinje cell bodies.  (See References)

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C) Granule cells

This answer is correct.


Cerebellar granule cells, the most abundant neurons in the human brain, give rise to parallel fibers. Parallel fibers rise to the molecular layer of the cerebellar cortex and make excitatory synapses with Purkinje cells.  (See References)

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D) Climbing fibers

This answer is incorrect.


Climbing fibers are axons from afferent neurons outside the cerebellum. They do not give rise to parallel fibers.  (See References)

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E) Purkinje cells

This answer is incorrect.


Purkinje cells receive excitatory input from parallel fibers. They are not the source of parallel fibers.  (See References)

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References:

1. Purves, D., Augustine, G.J., Fitzpatrick, D., Katz, L.C., LaMantia, A., McNamara, J., and Williams, S.M. (Eds.) (2001) Neuroscience. Sinauer Associates, Sunderland, MA.
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anatomy
Cerebellar Anatomy 01
Question ID: 030307152
Question written by J. Douglas Miles, (C) 2006-2009, all rights reserved.
Created: 03/03/2007
Modified: 03/03/2007
Estimated Permutations: 8400

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