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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
What separates the lobes of the cerebellum ?
What does the cerebellum consist of ?
- -Cerebellar cortex
- -Underlying white matter
How many nuclei are in white matter of the cerebellum ?
four paired nuclei
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
Who comes up with the movement first , the Cerebellum or the Cortex
The cortex and then the cerebellum coordinates it
What happens if there is damage to the cerebellum ?
- -Speech problems
- -walking issues
What happens if there is a cerebellar stroke ?
- -No walking
- -Power , tone and relfexes normal
Where would you see a cerebellar stroke on a CT Scan ?
Look for blood clot on Computed Tomography (CT)
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
What is ataxia ?
an inability to coordinate voluntary muscular movements that is symptomatic of some nervous disorders
What is Dysdiadochokinesia ?
impaired ability to perform rapid, alternating movements
Discuss the Motor Hierarchy with these words ?Draw it
Somatic Sensory inputs
Where is the cerebellar cortex , Deep Cerebellar Nuclei , Dentatate , Interposed , and fastigal
- Outer most :
- Cerebellar Cortex > Deep Cerebellar Nuclei > Dentate > Interposed > Fastigal
In terms of the Input and Output organization , where do the extrinsic inputs : mossy fiber ,climbing fiber
Both fibers > Cortex > nuclei > output
Where and Function :
- vermis and Intermediate hemisphere
- Spinocerebellum : Control of limbs and trunk
- Cerebrocerebellum: Planning of movement
- Vestibulo-cerebellum : Control of eye & head movements , balance
What to each of these areas do ?(Motor planning , Motor Execution , Eye mvt & balance)
- Dentate - Motor planning
- interposed -Motor execution
- fastigal-motor execution
- flocular-nodular lobe -eye and head mvt , and body balance.
Discussing the Cerbellar cortex , what are the inputs ?
Climbing fibers from inferior olive Mossy fibers
Discussing the Cerbellar cortex , what are the output ?
Discussing the Cerbellar cortex , what are the interneurons ?
- Granule neurons
- Stellate neurons
- Basket neurons
- Golgi Neurons
Ipsilateral or Bilateral ?
Intermediate and Lateral hemispheres
Vermis and Vestibulocerebellum
Intermediate and Lateral hemispheres -Ipsilateral
- Vermis and Vestibulocerebellum -
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)
When purkinje fibers are inhibited what happens to the size of the purkinje fiber neurons ?
reduces the size
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