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Cerebellar Anatomy 04
Topic: AnatomyCreated 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) Climbing fibers C) Pyramidal cells D) Betz cells E) Basket cells
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) 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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C) Pyramidal cells
This answer is incorrect.
Pyramidal cells are not found in the cerebellum. ( 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) 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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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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