2.29 Cerebellum Flashcards

1
Q

3 functional areas of cerebellum

A
  • vestibulocerebellum
  • spinocerebellum
  • cerebrocerebellum (via dentate nucleus)
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2
Q

vestibulocerebellum has to do with

A

balance

  • equipibrium
  • eye movements
  • postural muscles
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3
Q

spinocerebellum has to do with

A

gross movement

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4
Q

cerebrocerebellum has to do with

A

finer movement

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5
Q

systems that feed into vestibulocerebellum

A
  • visual

- vestibular

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6
Q

outcoems of vestibulocerebellum activation

A
  • eye movements

- postural muscle movement

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7
Q

The vestibulocerebellum is part of this lobe

A

flocculonodular lobe

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8
Q

spinocerebellum affects these systems

A

affects both lateral and medial UMN systems

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9
Q

3 main inputs to spinocerebellum

A
  • spinocerebellar internal feedback tracts (spinal cord)
  • somatosensory
  • sensorimotor
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10
Q

spinocerebellum outputs

A
  • brainstem

- thalamus

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11
Q

spinocerebellum acting on thalamus has effects on

A

medial and lateral UMN

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12
Q

spinocerebellum is part of the

A

vermis

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13
Q

cerebrocerebellum and fine movement

A
  • coordination
  • planing
  • timing
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14
Q

cerebrocerebellum inputs

A

somatosensory motor cortices » cerebrocerebellum via dentate nucleus

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15
Q

specific receptors for cerebrocerebellum

A
  • GTO
  • muscle spindles
  • cutaneous mechanoreceptors
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16
Q

cerebrocerebellum outputs

A
  • motor thalamus

- cerebral cortex

17
Q

cerebrocerebellum outcome

A

make corrections to movements

18
Q

cerebrocerebellum is part of the

A

lateral hemispheres

19
Q

primary job of cerebellar peduncles

A

connect cerebellum to everything else

20
Q

How many cerebellar peduncles?

A

3

21
Q

cerebellar peduncles: ratio of afferents to efferents

A

40:1

22
Q

What are the 3 cerebellar peduncles?

A
  • inferior
  • middle
  • superior
23
Q

inferior cerebellar peduncle receives afferents from

A

contralateral inferior olivary nucleus (ION)

24
Q

What does the ION connect?

A

ION connects spinal cord and brainstem to the cerebellum

25
Q

Which peduncle is the largest?

A

middle (has 20 million fibers)

26
Q

middle peduncle is (afferent/efferent)

A

afferent

27
Q

afferent fibers to the middle peduncle come from

A

pontine nuclei

28
Q

What does the middle peduncle connect?

A

cortex to pons to cerebellum

29
Q

superior peduncle is (afferent/efferent)

A

efferent

30
Q

Where does the superior peduncle run?

A

goes to brainstem and thalamic nuclei

31
Q

What two things are constantly making modifications to movement?

A
  • cerebellum

- basal ganglia

32
Q

3 blood supplies to cerebellum

A
  • superior cerebellar artery (SCA)
  • anterior inferior cerebellar artery (AICA)
    posterior inferior cerebellar artery (PICA)
33
Q

SCA comes off the

A

basilar artery

34
Q

AICA comes off the

A

basilar artery

35
Q

PICA comes off the

A

vertebral arteries