Cerebellum

Question 1

what is the function of the cerebellum?

Answer 1

it micromanages the cortex

Question 2

the cerebellum intefrates the sensory and motor systems to influence what? (6)

Answer 2

balance and equilibrium
muscle tone
postural reflexes 
co-ordination
fine motor control
intrinsic motor learning

Question 3

what are the 3 lobes of the cerebellum?

Answer 3

anterior lobe, posterior lobe, flocculonodular lobe

Question 4

what are the 3 functional divisions of the cerebellum?

Answer 4

Vestibulocerebellum
spinocerebellum
cerebrocerebellum

Question 5

what is the vestibulocerebellum responsible for?

Answer 5

postural responses to vestibular input (oldest pathway)

Question 6

what is the spinocerebellum responsible for?

Answer 6

muscle tone and postural control of limbs- more advanced postural calculations

Question 7

what is the cerebrocerebellum responsible for?

Answer 7

coordination of voluntary movements- (newest pathway)

Question 8

What are the 4 cerebellar deep nuclei?

Answer 8

Dentate, Emboliform, Globose, Fastigial

Question 9

info from the vestibulocerebellar loop synapses on which deep cerebellar nuclei?

Answer 9

fastigial

Question 10

info from the spinocerebellar loop synapses on which cerebellar deep nuclei

Answer 10

emboliform, globose, fastigial

Question 11

info from the cerebrocerebellar loop synapses on which nuclei?

Answer 11

dentate

Question 12

damage to the flocculonodular lobe creates which type of ataxia?

Answer 12

it affects the vestibulocerebellar loop

Truncal ataxia

Question 13

What are the symptoms of truncal ataxia?

Answer 13

loss of equilibrium (inability to stand)
staggering, wide base gait in an attempt to try to compensate for the lack of stability
also decreased stability while seated

Question 14

is there tremor in someone with truncal ataxia?

Answer 14

no

Question 15

what are reflexes and muscle tone like in someone with truncal ataxia?

Answer 15

normal

Question 16

can a patient with truncal ataxia do lower limb coordination testing?

Answer 16

Yes- heel to shin test

Question 17

a medulloblastoma affects where and most likely creates what type of ataxia?

Answer 17

tumor between the medulla and the cerebellum in the 4th ventricle

flocculonodular lobe- truncal ataxia

Question 18

what cerebellar condition is caused by chronic alcoholism?

Answer 18

anterior lobe syndrome

Question 19

what is anterior lobe syndrome?

Answer 19

degeneration of the cerebellar cortex starting at anterior end, bilaterally

affects the spinocerebellar loop

Question 20

what are the main symptoms of anterior lobe syndrome

Answer 20

affects the legs- so incoordination of the leg movements- broad based staggering gait

Question 21

can a patient with anterior lobe syndrom do lower limb coordination testing? (eg heel to shin test)

Answer 21

no- also cannot do heel-toe walk

Question 22

what is the condition that causes progressive degeneration of the proprioceptive pathways?

Answer 22

Friedrich Ataxia- its genetic

also degeneration of the corticospinal pathway

Question 23

cerebrocerebellum syndrome occurs when there is damage where?

Answer 23

to the lateral posterior lobe

Question 24

true or false, in cerebrocerebellar syndrom you get increased tone and increased reflexivity?

Answer 24

false- you see hypotonia and hyporeflexia

Question 25

what are some of the symptoms of cerebrocerebellar syndrome? (6)

Answer 25

dysmetria, dysarthria, dysdiadochokinesia (anything with speed), movement initiation is harder, intention tremor, issues stopping movements or changing directions