Cerebellum

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Author:
glparker86
ID:
262300
Filename:
Cerebellum
Updated:
2014-02-16 21:43:36
Tags:
Neuroanatomy
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Description:
Neuroanatomy
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  1. What are the functions of the Cerebellum ?
    • -Coordinating skilled voluntary actions
    • -Equilibrium and Muscle Tone using vestibular system
    • -Somatic body parts - Sensory Homonculus
  2. What separates the lobes of the cerebellum ?
    vermis
  3. What does the cerebellum consist of ?
    • -Cerebellar cortex 
    • -Underlying white matter
  4. How many nuclei are in white matter of the cerebellum ?
    four paired nuclei
  5. 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
  6. Who comes up with the movement first , the Cerebellum or the Cortex
    The cortex and then the cerebellum coordinates it
  7. What happens if there is damage to the cerebellum ?
    • -Tremors 
    • -Speech problems 
    • -walking issues
  8. What happens if there is a cerebellar stroke ?
    • -Dizziness
    • -vomitting
    • -No walking 
    • -Power , tone and relfexes normal
  9. Where would you see a cerebellar stroke on a CT Scan ?
    Look for blood clot on Computed Tomography (CT)
  10. 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
  11. What is ataxia ?
    an inability to coordinate voluntary muscular movements that is symptomatic of some nervous disorders
  12. What is Dysdiadochokinesia ?
    impaired ability to perform rapid, alternating movements
  13. Discuss the Motor Hierarchy with these words ? Draw it 
    Cerebral Cortex 
    Basal Ganglia 
    Cerebellum Somatic
    Sensory inputs 
    Thalamus 
    Brain Stem 
    Spinal Cord








  14. Where is the cerebellar cortex , Deep Cerebellar Nuclei , Dentate , Interposed , and fastigal ?
    • Outer most :
    • Cerebellar Cortex > Deep Cerebellar Nuclei > Dentate > Interposed > Fastigal

  15. In terms of the Input and Output organization , where do the extrinsic inputs : mossy fiber ,climbing fiber
    Both fibers > Cortex > nuclei > output

  16. 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

  17. What do 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.
  18. Discussing the Cerbellar cortex , what are the inputs ?
    • Climbing fibers from inferior olive Mossy fibers
  19. Discussing the Cerbellar cortex , what are the output ?
    • Purkinje neurons
  20. Discussing the Cerbellar cortex , what are the interneurons ?
    • Granule neurons 
    • Stellate neurons
    • Basket neurons
    • Golgi Neurons

  21. Ipsilateral or Bilateral ?
    Intermediate and Lateral hemispheres
    Vermis and Vestibulocerebellum
    Intermediate and Lateral hemispheres -Ipsilateral

    • Vermis and Vestibulocerebellum -
    • Bilateral
  22. 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)
  23. When purkinje fibers are inhibited what happens to the size of the purkinje fiber neurons ?
    reduces the size
  24. 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
  25. What does motor learning require How is it implemented ?
    sensory awareness

    via the descending cortical and brain stem pathways
  26. Cognitive and emotional disturbances have anatomical connections to ?
    prefrontal and cingulate cortex (via thalamus)
  27. What is the cerebellum major function ? what can they also apply to ?
    No single function–Clearly mostly motor; learning, optimizes–Functions may apply to cognitive and emotional behaviors

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