Cerebellar function

Question 1

definition: titubation

Answer 1

tremor of the entire trunk or head during stance and gait, caused by cerebellar midline lesions

Question 2

which cell type of the source of axons leaving the cerebellar cortex?

Answer 2

purkinje

Question 3

which cerebellar cortex cell makes excitatory synapses?

Answer 3

granule

Question 4

what is the effect of mossy fibers on purkinje cells?

Answer 4

excitatory (via granule cells)

Question 5

what is the effect of climbing fibers on purkinje cells?

Answer 5

excitatory

Question 6

deficiency of which vitamin is associated with atrophy of the anterior lobe of the cerebellum?

Answer 6

thiamine

Question 7

which part of the cerebellum is responsible for verb generation?

Answer 7

right lateral cerebellum

Question 8

what is the origin of the mossy fibers?

Answer 8

spinal cord and brainstem

Question 9

what is the origin of the climbing fibers?

Answer 9

inferior olivary nucleus

Question 10

what is the effect of purkinje cells on deep cerebellar nuclei?

Answer 10

inhibitory

Question 11

what is the output effect of the deep cerebellar nuclei?

Answer 11

excitatory

Question 12

what is the role of golgi cells?

Answer 12

cerebellar cortex cells that affect dendritic input to purkinje cells by inhibiting granule cells

Question 13

what is the role of stellate cells?

Answer 13

cerebellar cortex cells that affect dendritic integration of purkinje cells through inhibitory synapses onto dendritic tree

Question 14

what is the role of basket cells?

Answer 14

cerebellar cortex cells that make inhibitory synapses near initial segment of purkinje cell axon

Question 15

what is the anatomical location of the vestibulocerebellum?

Answer 15

flocculonodular node

Question 16

what are the functions of the vestibulocerebellum?

Answer 16

1. regulate equilibrium 2. regulate gait and posture through vestibulospinal reflexes 3. control of eye movements and coordinate movement of head and eyes 4. visual guidance of movement

Question 17

what are the main functions of the spinocerebellum - vermis portion?

Answer 17

1. regulate axial and proximal musculature 2. ongoing motor execution 3. regulation of muscle tone

Question 18

what are effects of lesions to the vestibulocerebellum?

Answer 18

1. ataxic gait 2. cerebellar nystagmus 3. deficits in smooth pursuit eye movements

Question 19

what are the main functions of the spinocerebellum - paravermal region?

Answer 19

1. regulation of distal muscles 2. ongoing motor execution 3. regulation of muscle tone

Question 20

what are the effects of lesions to the spinocerebellum?

Answer 20

1. ipsilateral hypotonia 2. dysmetria 3. intention tremor 4. pendular reflexes

Question 21

what are the functions of the cerebrocerebellum?

Answer 21

1. preparation of movement 2. learned, skilled, voluntary movement 3. timing functions

Question 22

what are the effects of lesions to the cerebrocerebellum?

Answer 22

1. delays in initiating and terminating movements 2. problems with multi joint movements 3. inability to judge elapsed time in non-motor tasks

Question 23

definition: dysarthria

Answer 23

disorder in articulating speech