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75 Cards in this Set
- Front
- Back
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What are the four deep nuclei of the cerebellum?
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Emboliform, Denate, Globose, Fastigial
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The MCP takes what?
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Pontocerebellar Afferent
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The Efferent of the ICP?
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Cerebello-vestibular, Cerebello-reticular
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The Afferent of the ICP?
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DSCT, CCT, Vestibulocerebellar, Reticulocerebellar, Trigeminocerebellar
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SCP afferents are?
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VSCT
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The Efferents fo SCP?
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Cerebello-rubro-thalamic.
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What is the cerebellum concerned with?
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Motor control. The coordination of muscles for fine motor control
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The 3 layers of the cerebellum?
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Molecular, Purkinje, Granular
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The molecular layer contains?
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Stellate and basket cells
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The granular layer contains?
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Granule cells and their golgi
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These cells are extremely large, and recieve input from mossy fibers, their axons form the parallel fibers of the molecular layer which then synapse on Purkinki cells?
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Granule Cells
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Granule cells action and neurotransmitter?
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Excititory, glutamate
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They are large, flask shaped cell bodies that recieve INPUT from parallel fibers and climbing fbers?
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Purkinje fibers
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Their myelinated axons terminate in the deep nuclie and carry the sole output of the cerebellar cortex.
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Purkinkje fibers
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What is the NT of purkinje fibers and its action?
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GABA and is inhibitory
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These 3 cells are also present in the cerebellum and are inhibitory internerurons?
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Basket, Golgi, Stellate cells
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What do most of the afferents to the cerebellum terminate as? These fibers are from pontocerebellar, vestibulocerebellar, spinocerebellar
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Mossy Fibers
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What do mossy fibers synapse on 500-600 times that leads to them haveing input influences on Purkinje cells?
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They synapse on granule cells and those in turn synapse on Purkinje fibers
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Mossy fibers are ____ to both Purkinje cells and deep nuclei. What neurotransmitter do they use?
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Excitatory. use acetylcholine
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Where do climbing fibers originate?
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Contralateral inferior olivary complex ==== olivocerebellar fibers
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Climbing fibers have 10-15 terminal branches that synapse 500-600 times on a Purkinje cells so how many purkinje cells are influence by a single Climbing fiber?
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10-15
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Climbing fibers are _____ and use _____ as its NT
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Excititory and use asparate as the NT
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The dentate, globose, and emboliform leave via____ to excite the_____
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SCP to go to the Thalamus and Red nucleus
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The fastigal leaves via ____ to excite____
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ICP to excite the vestibular nuclie and reticular formation
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Purkinje cells inhibit what ???? via the ICP from which lobe??/
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The reticular formation and vestibular nuclei from the flocculonodular lobe.
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Climbing and Mossy Fibers are excitatory to the ___?
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Cerebellum
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Out put of the cerebral cortex is promarily to the deep cerbellar nuclie via _____ and is???
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Purkinje fibers and is inhibitory
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Output from the cerebellum is ???
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Excitatory
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Lateral Cerebellar hemispehers go to?
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Dentate nuclei
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Paravermal areas project to?
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Globose and emboliform
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Vermal areas and flocculus project to ?
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Fastigial nuclei
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The MCP is entirely _____ to the pontocerebellar.
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Afferent
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ICP is primarily?
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Afferent
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SCP is primarily?
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Efferent
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The vestibulocerebellum includes what?
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Flocculonodulara lobe and uvula
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Where does the vestibulocerebellum get input from?
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Vestibular nerve and nuclei
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Output from vestibulocerebellar cortexs influences ____ indirectly by ?
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LMNs by reticular formation and vestibular nuclei
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THe vestibulocerebellum function is?
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Maintiaing balance and equilibrium by adjusting muscle tone in axial and neck and controls eye movement.
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Spinocerebelumm includes?
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Medial portion of cerebellum. Most of vermis plus para vermal hemisphere
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Where does the input for the spinocerebellum come from?
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DSCT, VSCT, CCT
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Where does output from the spinocerebellum go to do what
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Fastigial nuclei (ICP) + globose and emboliform (SCP) to influence LMN indirectly
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How does the spinocerebellum influence LMN indirectly?
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Via vestibular nuclei, reticular formation, Thalamus and red nuclei
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The spinocerebellum influences what?
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Muscle tone and synnergery of movements during walking
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Neocerebullum uses lateral portions of the hemispheres and gets input from?
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Pontocerebellar tr.
Olivocerebellar tract |
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The neocerebullum output goes out vie?
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Dentate Nuclei
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What is the function of the neocerebellum?
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Adjustment of muscle tone of learned, skilled movements
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The cerebellum acts as a comparator between what the _____ is telling the muscles to do and what the muscles are actually doing
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Motor cortex.
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Midlnine damage of the cerebellum results from damage to the vermis sometimes going into what?
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The spinocerebellum or the flocculonodular lobe
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Midline damages can result in bilateral deficits such as?
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Dysequilibrium, positional nystagmus, ataxic gait
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What can cause midline damge of the cerebellum?
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Medulloblastoma, chronic alcoholism
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This syndrome results from damage to the cerebellar hemispheres and/or its connections (cerbellar cortex, deep nuclei) most severe when deep nuclei or superior cerebellar peduncles are involved?
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Neocereballar syndrome
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This syndrom has deficits on fine motor control with relation to force, range, rate or direction of movement?
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Neocerebellar syndrome
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Intention tremors occur in this syndrome, (abnormal movements when muscles are being used)
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Neocereballar syndrome
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What produces an ongoing tremor that tends to diminsh when muscles are used?
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Basal ganglia lesions
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In neocerebellar syndrome if the lesion is unilateral the deficits will be on??????
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The ipsilateral side to lesion
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Intermittent or jerky movements due to errors in rate, force, and directection; often used in reference to gait?
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Ataxia
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Ataxia of the ocular muscles?
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Nystagmus
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Asthenia is?
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Weakness: tiring easily due to hypotonia
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The dampining of the reflex is slowed so there is more than the usual number of swings
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Hypotonia, hyporeflexia
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Asynergy or dyssynergy
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Decomposition of movement: complex movements are broken down into their basic components
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This syndrome results from damage to the cerebellar hemispheres and/or its connections (cerbellar cortex, deep nuclei) most severe when deep nuclei or superior cerebellar peduncles are involved?
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Neocereballar syndrome
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This syndrom has deficits on fine motor control with relation to force, range, rate or direction of movement?
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Neocerebellar syndrome
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Intention tremors occur in this syndrome, (abnormal movements when muscles are being used)
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Neocereballar syndrome
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What produces an ongoing tremor that tends to diminsh when muscles are used?
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Basal ganglia lesions
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In neocerebellar syndrome if the lesion is unilateral the deficits will be on??????
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The ipsilateral side to lesion
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Intermittent or jerky movements due to errors in rate, force, and directection; often used in reference to gait?
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Ataxia
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Ataxia of the ocular muscles?
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Nystagmus
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Asthenia is?
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Weakness: tiring easily due to hypotonia
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The dampining of the reflex is slowed so there is more than the usual number of swings
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Hypotonia, hyporeflexia
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Asynergy or dyssynergy
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Decomposition of movement: complex movements are broken down into their basic components
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Dysarthria or scanning speech
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Asynergy in muscles used for speech. Speech is thick and monotonous
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Dysmentria-
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Past pointing. abnormal range of movement
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Dysdiadochokinesia
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Abnormatily in rapidly alternating movements
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Intention tremors occur?
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During movement
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Rebound
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Delay in stopping movement
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