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What are the functions of the Cerebellum ?
- -Coordinating skilled voluntary actions
- -Equilibrium and Muscle Tone using vestibular system
- -Somatic body parts - Sensory Homonculus
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What separates the lobes of the cerebellum ?
vermis
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What does the cerebellum consist of ?
- -Cerebellar cortex
- -Underlying white matter
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How many nuclei are in white matter of the cerebellum ?
four paired nuclei
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The fourth ventricle is close the cerebellum so if there is mass lesions or swelling what can happen if the fourth ventricle is compressed?
- CSF will be stopped and you will get
- Hydrocephalus
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Who comes up with the movement first , the Cerebellum or the Cortex
The cortex and then the cerebellum coordinates it
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What happens if there is damage to the cerebellum ?
- -Tremors
- -Speech problems
- -walking issues
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What happens if there is a cerebellar stroke ?
- -Dizziness
- -vomitting
- -No walking
- -Power , tone and relfexes normal
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Where would you see a cerebellar stroke on a CT Scan ?
Look for blood clot on Computed Tomography (CT)
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What is Hypometria ?
a condition of cerebellar dysfunction in which voluntary muscular movements tend to result in the movement of bodily parts (as the arm and hand) short of the intended goal
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What is ataxia ?
an inability to coordinate voluntary muscular movements that is symptomatic of some nervous disorders
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What is Dysdiadochokinesia ?
impaired ability to perform rapid, alternating movements
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Discuss the Motor Hierarchy with these words ?Draw it
Cerebral Cortex
Basal Ganglia
Cerebellum
Somatic Sensory inputs
Thalamus
Brain Stem
Spinal Cord
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Where is the cerebellar cortex , Deep Cerebellar Nuclei , Dentatate , Interposed , and fastigal
- Outer most :
- Cerebellar Cortex > Deep Cerebellar Nuclei > Dentate > Interposed > Fastigal
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In terms of the Input and Output organization , where do the extrinsic inputs : mossy fiber ,climbing fiber
Both fibers > Cortex > nuclei > output
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Where and Function :
Spinocerebellum
- vermis and Intermediate hemisphere
Cerebrocerebellum:
-lateral hemisphere
Vestibulo-cerebellum
-floculo-nodular lobe
- Spinocerebellum : Control of limbs and trunk
- Cerebrocerebellum: Planning of movement
- Vestibulo-cerebellum : Control of eye & head movements , balance
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What to each of these areas do ?(Motor planning , Motor Execution , Eye mvt & balance)
Dentate
interposed
fastigal
flocular-nodular lobe
- Dentate - Motor planning
- interposed -Motor execution
- fastigal-motor execution
- flocular-nodular lobe -eye and head mvt , and body balance.
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Discussing the Cerbellar cortex , what are the inputs ?
Climbing fibers from inferior olive Mossy fibers
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Discussing the Cerbellar cortex , what are the output ?
Purkinje neurons
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Discussing the Cerbellar cortex , what are the interneurons ?
- Granule neurons
- Stellate neurons
- Basket neurons
- Golgi Neurons
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Ipsilateral or Bilateral ?
Intermediate and Lateral hemispheres
Vermis and Vestibulocerebellum
Intermediate and Lateral hemispheres -Ipsilateral
- Vermis and Vestibulocerebellum -
- Bilateral
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What is the motor function of the Cerebellum ?
What is the non-motor function of the Cerebellum?
- Motor = Learning /adaptation
- Non-Motor = Active tactile exploration
- Higher brain function
- (Cerebellar cognitive affective syndrome)
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When purkinje fibers are inhibited what happens to the size of the purkinje fiber neurons ?
reduces the size
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If there are lesions on the posterior cortex and vernix what would be some problems ?
- -impairment of executive functions
- -Difficulties with spatial cognition
- -Personality changes
- -Language disorders
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