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Cerebellar Anatomy 04

Topic: Anatomy

Created on Friday, April 6 2007 by jdmiles

Last modified on Friday, April 6 2007.

In the structure highlighted in red in the image above, parallel fibers arise from:

 
        A) Granule cells
 
        B) Pyramidal cells
 
        C) Golgi cells
 
        D) Purkinje cells
 
        E) Climbing fibers
 

 


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This question was created on April 06, 2007 by jdmiles.
This question was last modified on April 06, 2007.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS




A) 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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B) Pyramidal cells

This answer is incorrect.


Pyramidal cells are not found in the cerebellum.  (See References)

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C) Golgi cells

This answer is incorrect.


Golgi cells do not give rise to parallel fibers. Golgi cells receive input from parallel fibers, and feed back inhibitory signals to the granule cells from which the parallel fibers arise.  (See References)

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D) 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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E) 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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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 04
Question ID: 040607146
Question written by J. Douglas Miles, (C) 2006-2009, all rights reserved.
Created: 04/06/2007
Modified: 04/06/2007
Estimated Permutations: 8400

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