cerebellum Flashcards

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1
Q

function of the cerebellum

A

coordinate muscle action
learn motor tasks
regulate muscle tone and posture

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2
Q

where does output of the cerebellum go to

A

brainstem and thalamus

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3
Q

cerebellum input

A

sensory input

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4
Q

what happens when the cerebellum is damaged

A

abnormalities in equilibrium, muscle tone, posture and coordination
- no sensory or motor loss

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5
Q

basic organization of cerebellum

A

excitatory inputs to cerebellar cortex
inhibitory outputs from purkinje cells to deep cerebellar nuclei
excitatory outputs from deep cerebellar nuclei

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6
Q

input from pontocerebellar tract goes through what

A

middle cerebellar peduncle

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7
Q

pontine nuclei holds what functions

A

many cortical areas project

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8
Q

lesions of inferior olive are equivalent to what

A

loss of entire contralateral cerebellar cortex

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9
Q

vestibulocerebellum function

A

movement of head and coordinated nystagmus

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10
Q

spinocerebellum function

A

proprioception and kinesthetics
input from extremities to form coordinated response

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11
Q

cerebrocerebellum tract

A

cortex to pontine nuclei to cerebellum to cerebellar nuclei to thalamus to motor cortex

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12
Q

features of cerebellar dysfunction

A

ataxia of trunk of vermis, appendage ataxia if lateral parts
wide base stance
intention tremor, postural tremor, dysmetria and dysdiadochokinesia

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13
Q

dysdiadochokinesia

A

incoordination with rapid alternating movements

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14
Q

midline damage to cerebellum

A

postural instability and LE ataxia

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15
Q

lateral damage to cerebellum

A

limb ataxia, muscle tone and reflex changes ipsilateral to lesion

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16
Q

damage to flocculus

A

equilibrium and eye movement problems

17
Q

Romberg test positive test

A

ataxic- dorsal column involvement

18
Q

Romberg test negative

A

cerebellar involvement