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26 Cards in this Set
- Front
- Back
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what is the vermis?
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-the midline region
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what divides the anterior and posterior lobes?
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-primary fissure
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what separates the posterior and flocconodular lobes?
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-posterolateral fissure
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what are the 3 major pairs of nuclei in the cerebellum?
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-fastigial
-interpositus (globose & emboliform) -dentate |
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what is the orientation of the 3 nuclei from medial to lateral?
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-fastigial > interpositus > dentate
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what does the vestibulocerebullum include and what is its function?
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-flocculus and nodulus
-involved in posture and equilibrium |
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what does the spinocerebellum include?
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-vermis and intermediate zone
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what is the function of the vermis?
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-proximal muscle movement
-vestibulo ocular responses |
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what is the nucleus interpositus concerned with?
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-larger movements of walking and running
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what is the cerebrocerebellum composed of?
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-lateral aspects of anterior and posterior lobes
-dentate nuc |
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what is the function of the cerebrocerebellum?
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-controls tasks of fine dexterity
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what are the three pathways that connect the cerebellum to the brainstem?
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-inferior, middle and superior cerebellar peduncles
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what are the three microscopic layers of the cerebellum?
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-granular
-purkinje -molecular |
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what are the characteristics of midline cerebellar disorder?
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-seen in alcoholic cerebellar degeneration
-wide based stance and ataxia of gait -hypotonia, nystagmus, dysarthria |
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what are the characteristics of hemispheric cerebellar syndrome?
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-seen in infarcts, hemorrhages, tumors, abscesses, and MS
-inccordination of ipsilateral appendicular movements |
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what are the characteristics of pancerebellar syndrome?
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-all symptoms of other two
-seen in infectious, neoplastic, and neurodegenerative disorders |
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what are the four cell types in the granular layer?
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-mossy fibers
-climbing fibers -granule cells -golgi cells |
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what is the function of mossy fibers?
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-activate granule cells and efferent cerebellar nuclei
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what is the function of climbing fibers?
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-localized bursting of purkinje cell activity
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what is the function of granule cells?
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-activates purkinjes
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what is the function of golgi cells?
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-inhibits granule cells
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what are the two cell types in the purkinje cell layer?
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-purkinje cells
-basket cells |
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what is the function of purkinje cells?
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-inhibit deep cerebellar nuclear outflow
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what is the function of basket cells?
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-inhibit nearby purkinje cells
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what cell type is found in the molecular cell layer?
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-stellate
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what is the function of stellate cells?
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-inhibit nearby purkinje cells
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