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Cerebellar Anatomy 01
Topic: AnatomyCreated on Saturday, March 3 2007 by jdmiles
Last modified on Saturday, March 3 2007.
In the cerebellum, parallel fibers arise from:
A) Granule cells B) Purkinje cells C) Climbing fibers D) Betz cells E) Golgi cells
This question was created on March 03, 2007 by jdmiles.
This question was last modified on March 03, 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) 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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C) 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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D) Betz cells
This answer is incorrect.
Betz cells are not found in the cerebellum. ( See References)
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E) 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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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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