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'''Parallel fibers''' arise from [[granule cell]]s in the [[Cerebellum|cerebellar cortex]]. They form [[synapse]]s onto the [[dendrite]]s of [[Purkinje cell]]s (the output [[neuron]]s of the [[cerebellum]]). |
'''Parallel fibers''' arise from [[granule cell]]s in the [[Cerebellum|cerebellar cortex]]. They form excitatory [[synapse]]s onto the [[dendrite]]s of [[Purkinje cell]]s (the output [[neuron]]s of the [[cerebellum]]). |
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Granule cells are very small and very numerous. They are thought to make up as many as half of the neurons in the brain. Granule cells have [[axon]]s which rise up and then branch out into parallel fibers. These fibers intersect the Purkinje cell dendrites.<ref> |
Granule cells are very small and very numerous. They are thought to make up as many as half of the neurons in the brain. Granule cells have [[axon]]s which rise up and then branch out into parallel fibers. These fibers intersect the Purkinje cell dendrites.<ref> |
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Revision as of 14:51, 17 September 2011
| Parallel fiber | |
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 Microcircuitry of the cerebellum. Excitatory synapses are denoted by (+) and inhibitory synapses by (-). MF: Mossy fiber. DCN: Deep cerebellar nuclei. IO: Inferior olive. CF: Climbing fiber. GC: Granule cell. PF: Parallel fiber. PC: Purkinje cell. GgC: Golgi cell. SC: Stellate cell. BC: Basket cell. | |
| Anatomical terminology |
Parallel fibers arise from granule cells in the cerebellar cortex. They form excitatory synapses onto the dendrites of Purkinje cells (the output neurons of the cerebellum).
Granule cells are very small and very numerous. They are thought to make up as many as half of the neurons in the brain. Granule cells have axons which rise up and then branch out into parallel fibers. These fibers intersect the Purkinje cell dendrites.[1]
References
- ^
Bear, Mark F. (2006). Neuroscience: Exploring the Brain (Digitised online by Google Books). Lippincott Williams & Wilkins. p. 773. ISBN 0781760038, 9780781760034. Retrieved 2008-12-25.
{{cite book}}: Check|isbn=value: invalid character (help); Cite has empty unknown parameter:|month=(help); Unknown parameter|coauthors=ignored (|author=suggested) (help); Unknown parameter|firstn=ignored (help) Image of Parallel fiber
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