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20 Cards in this Set
- Front
- Back
What layer of the Cerebellar Cortex is indicated by the white arrow?
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The Molecular Layer.
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What layer of the Cerebellar Cortex is indicated by the white arrow?
What type of cells are found in this layer. |
The Granule Cell layer.
2 types: 1) Granule Cells, with axons going to the Molecular layer, and 2) The larger Golgi Cells, with dendrites coming from the Molecular Layer. (There is a much smaller number of Golgi Cells) |
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What types of cells are found in the Molecular Layer?
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2 types:
1) Stellate Cells: in the upper region of the layer. 2) Basket Cells: larger, and located adjacent to the Purkinje Cells. |
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What cell layer is indicated by the white (and green) arrow?
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The Purkinje Cell Layer.
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How can you identify the Purkinje Cell Layer?
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It is only one cell deep, but the cells are very large and it borders the Molecular and Granular Cell layers.
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What is the role of Purkinje Cells?
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They provide the sole efferent path from the cerebellar cortex. Their axons project inhibitory signals onto the cells of the Cerebellar Nuclei.
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Where do the Purkinje Cells receive their input?
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Their dendrites project into the Molecular Layer.
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What cells provide inputs to Purkinje Cells?
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There are four inputs, 2 inhibitory and 2 excitatory.
1) Inhibitory (blue boxes): Basket and Stellate cells from the Molecular Layer. 2) Excitatory (red boxes): Granule cells from the Granule Cell Layer, and Climbing Fibers from the Inferior Olive of the Medulla. |
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Which cells provide the strongest excitatory input to the Purkinje Cells?
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The Climbing Fibres from the Inferior Olive have the strongest excitatory input.
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How many Cerebellar Nuclei are there?
What are their names? |
Four pairs. They are:
1) Fastigial, 2) Globose, 3) Emboliform, and 4) Dentate nuclei. |
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Which cerebellar nucleus is indicated by the blue arrow?
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The Fastigial Nucleus.
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Which cerebellar nucleus is indicated by the blue arrow?
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The Globose Nuclei
(Globose means, "Ball-shaped") |
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Which cerebellar nucleus is indicated by the blue arrow?
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The Emboliform Nucleus.
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Which cerebellar nucleus is indicated by the blue arrow?
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The Dentate Nucleus
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What is the role of the cerebellar nuclei?
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Almost all of the output from the cerebellum originates from cells in these nuclei.
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What are the inputs to the Cerebellar Cortex?
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Only 2 kinds of fibres:
1) Climbing Fibres: from the Inferior Olive. 2) Mossy Fibres: from many places (cerebral cortex, vestibular nerve & nuclei, spinal cord, reticular formation, and cerebellar nuclei) |
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What cells do the Mossy Fibres synapse with?
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The Granule Cells.
They form complex arrangements called "Rosettes." |
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What cells do the Granule Cell axons synapse with?
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The Granule Cells form excitatory synapses with 3 cell types:
1) Purkinje Cells, 2) Stellate Cells, and 3) Basket Cells. |
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What is the source of the Parallel Fibres of the Molecular Layer?
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They are formed by divisions of the axons of the Granule Cells.
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What is the role of the Golgi Cells in the Granule Cell Layer?
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They act as inhibitory interneurons with the Granule Cells.
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