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CNS > Cerebellum > Flashcards

Cerebellum Flashcards

1
Q

Functions of cerebellum

A

Integrates sensory info on momentary status of muscle contraction, joint tension, visual and auditory input on equilibrium

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2
Q

Integration of sensory info allows cerebellum to aid and influence…

A

Muscle tone
Posture
Coordination

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3
Q

Input is entirely

A

Subconscious

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4
Q

Each cerebellar hemisphere influences

A

Ipsilateral side of body

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5
Q

Cerebellum attached to MO via

A

Inferior cerebellar peduncle

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6
Q

Cerebellum attached to pons via

A

Middle cerebellar peduncle

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7
Q

Cerebellum attached to midbrain via

A

Superior cerebellar peduncle

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8
Q

Inferior peduncle fiber distribution

A

Afferent dominates

Some efferent

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9
Q

Restiform Body

A

Afferent fibers in inferior peduncle

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10
Q

Juxtarestiform body

A

Efferent fibers in inferior peduncle

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11
Q

Middle peduncle fiber distribution

A

Afferent only

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12
Q

Superior peduncle fiber distribution

A

Efferent dominates

Afferent present

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13
Q

Medulloblastomas arise in

A

Superior medullary velum

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14
Q

20% of all childhood brain tumors are

A

Medulloblastomas

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15
Q

Vestibulocerebellum

Lobes

A

Flocculonodular

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16
Q

Spinocerebellum

Lobes

A

Anterior, vermis, medial posterior

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17
Q

Cerebrocerebellum

Lobes

A

Lateral posterior

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18
Q

Vestibulocerebellum receives input from

A

Vestibular nucleus

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19
Q

Spinocerebellum receives input from

A

Spinocerebellar and cuneocerebellar

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20
Q

Cerebrocerebellum receives input from

A

Cortico-pontocerebellar

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21
Q

Functions of vestibulocerebellum

A

Posture
Equilibrium
Balance

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22
Q

Functions of Spinocerebellum

A

Muscle tone

Trunk and limb movements

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23
Q

Functions of Cerebrocerebellum

A

Planning and coordination of skilled movement

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24
Q

White matter of cerebellum collectively called

A

Corpus medullare

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25
Q

Arbor Vitae

A

Extensions of white matter toward periphery

Appear as branching tree

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26
Q

Convolutions of cerebellar cortical gray matter increase

A

Surface area in a relatively small space

27
Q

Most common neuron cell types of cerebellar gray matter

A

Purkinje neurons

Granular neurons

28
Q

3 Laminae of cerebellar cortex

A
  1. Molecular (outermost, lots of synaptic activity)
  2. Purkinje Cell body layer
  3. Granular (deepest)
29
Q

2 types of outside axons bring input to cerebellar cortical laminae

A
  1. Mossy fibers

2. Climbing fibers

30
Q

Climbing fibers originate

A

Inferior Olivary nucleus

31
Q

____ fibers take message away from cerebellar cortex

A

Purkinje

32
Q

NT released by Purkinje axon

A

GABA

33
Q

GABA is

A

Inhibitory NT

34
Q

Nystagmus

A

Repetitive jerking movement of eyeballs

35
Q

Dysmetria

A

Measured movements difficult to make

36
Q

Intention tremor

A

Exaggerated tremor when voluntarily trying to make precise movements of digits

37
Q

Ataxia

A

Lack of order or coordination

38
Q

_____ disturbances are common in cerebellar disorders

A

Equilibrium

39
Q

Deep grooves

A

Fissures

40
Q

Shallow grooves

A

Sulci

41
Q

Raised area

A

Folia

42
Q

Mossy fibers release

A

Glutamate

43
Q

Climbing fibers release

A

Aspartate

44
Q

Granular cell dendrites are stimulated by

A

Mossy fibers

45
Q

Granular cells synapse on

A

Spined Purkinje dendrites

46
Q

____ is brain’s most abundant neurochemical

A

Glutamate

47
Q

Mossy fibers synapse with

A

Granular cells

48
Q

Climbing fibers are ____ numerous than mossy fibers

A

Far less

49
Q

Climbing fibers synapse on

A

Smooth Purkinje dendrites directly

50
Q

Central cerebellar nuclei

A

Dentate
Emboliform
Globose
Fastigial

51
Q

Dentate

A

Largest and most lateral

52
Q

Emboliform and Globose collectively referred to as

A

Interposed nuclei

53
Q

Fastigial

A

Most primitive and medial

54
Q

____ fibers synapse with neurons of deep central nuclei

A

Purkinje

55
Q

Purkinje axons from cortex of Vestibulocerebellum go to

A

Lateral vestibular nucleus

56
Q

Purkinje axons from cortex of spinocerebellum go to

A

Globose, emboliform, and fastigial nucleus

57
Q

Purkinje axons from cortex of cerebrocerebellum go to

A

Dentate Nucleus

58
Q

Fastigial Nucleus fibers exit via

A

Inferior cerebellar peduncle

59
Q

Fastigial Nucleus fibers terminate in

A

Vestibular nucleus
Reticular formation
Nuclei for CN 3, 4, 6

60
Q

Interposed nucleus axons extend to

A

Red nucleus

Reticular formation

61
Q

Interposed nuclei exit via

A

Superior cerebellar peduncle

62
Q

Dentate axons go to

A

Thalamus

63
Q

Dentate axons leave via

A

Superior cerebellar peduncle

CNS (9 decks)

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