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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
Arbor Vitae
Extensions of white matter toward periphery | Appear as branching tree
26
Convolutions of cerebellar cortical gray matter increase
Surface area in a relatively small space
27
Most common neuron cell types of cerebellar gray matter
Purkinje neurons | Granular neurons
28
3 Laminae of cerebellar cortex
1. Molecular (outermost, lots of synaptic activity) 2. Purkinje Cell body layer 3. Granular (deepest)
29
2 types of outside axons bring input to cerebellar cortical laminae
1. Mossy fibers | 2. Climbing fibers
30
Climbing fibers originate
Inferior Olivary nucleus
31
____ fibers take message away from cerebellar cortex
Purkinje
32
NT released by Purkinje axon
GABA
33
GABA is
Inhibitory NT
34
Nystagmus
Repetitive jerking movement of eyeballs
35
Dysmetria
Measured movements difficult to make
36
Intention tremor
Exaggerated tremor when voluntarily trying to make precise movements of digits
37
Ataxia
Lack of order or coordination
38
_____ disturbances are common in cerebellar disorders
Equilibrium
39
Deep grooves
Fissures
40
Shallow grooves
Sulci
41
Raised area
Folia
42
Mossy fibers release
Glutamate
43
Climbing fibers release
Aspartate
44
Granular cell dendrites are stimulated by
Mossy fibers
45
Granular cells synapse on
Spined Purkinje dendrites
46
____ is brain’s most abundant neurochemical
Glutamate
47
Mossy fibers synapse with
Granular cells
48
Climbing fibers are ____ numerous than mossy fibers
Far less
49
Climbing fibers synapse on
Smooth Purkinje dendrites directly
50
Central cerebellar nuclei
Dentate Emboliform Globose Fastigial
51
Dentate
Largest and most lateral
52
Emboliform and Globose collectively referred to as
Interposed nuclei
53
Fastigial
Most primitive and medial
54
____ fibers synapse with neurons of deep central nuclei
Purkinje
55
Purkinje axons from cortex of Vestibulocerebellum go to
Lateral vestibular nucleus
56
Purkinje axons from cortex of spinocerebellum go to
Globose, emboliform, and fastigial nucleus
57
Purkinje axons from cortex of cerebrocerebellum go to
Dentate Nucleus
58
Fastigial Nucleus fibers exit via
Inferior cerebellar peduncle
59
Fastigial Nucleus fibers terminate in
Vestibular nucleus Reticular formation Nuclei for CN 3, 4, 6
60
Interposed nucleus axons extend to
Red nucleus | Reticular formation
61
Interposed nuclei exit via
Superior cerebellar peduncle
62
Dentate axons go to
Thalamus
63
Dentate axons leave via
Superior cerebellar peduncle

CNS (9 decks)

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