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Definition
| vermal and intermediate areas in the cerebellum. close links with motor and sensory systems of the spinal cord. Proximal and girdle limb muscles. |
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| most numerous cells in the cerebellum. only exictatory neurons as well.give rise to parallel fibers which coordinate the Purjinke cells. |
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| from inferior olive. collaterals to deep nuclei. each fiber activates many Purkinje cells. |
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Definition
| majority of input axons to cerebellum. excite deep cerebellar nuclei and granule cells, which give rise to parallel fibers. |
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Definition
| most medial deep nucleus in cerebellum. sends outputs to ventro-medial brainstem pathway |
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| inability to perform rapid alternating movements |
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| cerebellar hemispheres: have a more or less exclusive relationship with the cerebral cortex. concerned with high level coordination of fine voluntary movements, especially of distal joints |
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| output cells of cerebellum. form inhibitory connections. |
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| middle deep cerebellar nucleus. contains two smaller nuclei, the globose and the emboliform |
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Definition
| middle deep cerebellar nucleus. contains two smaller nuclei, the globose and the emboliform. sends output to the red nucleus and the lateral brainstem path |
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Definition
| incoordination due to an inability to perform smoothly blended sequences of muscle contractions |
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| overshooting or past-pointing of cerebellar ataxia causes the limb to oscillate as it seeks to reach the target position. |
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| connects the cerebellum to the brainstem (3 large) |
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| most lateral deep nucleus. sends output to the primary motor cortex and premotor cortex via VL of thalamus |
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Definition
| improperly scaled movements: leads to overshooting and past pointing |
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Definition
| in dorsal column disease, the patient depends on visual stimuli to know proprioception. this sign is swaying when the patient closes their eyes. indicates sensory ataxia. (not true in cerebellar ataxia - closing the eyes does not make cerebellar ataxia worse) |
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