6.1 Cerebellum

Question 1

vestibulocerebellum modulates _______ and ____________

Answer 1

balance, eye movements

Question 2

the _______ is in the midline and modulates ____________

Answer 2

vermis, descending systems (axial control)

Question 3

the ___________ is located one either side of the vermis, modulates the lateral and medial ________________

Answer 3

spinocerebrum, motor descending systems

Question 4

the _______ peduncle projects to the cortex

Answer 4

superior

Question 5

the _________ peduncle receives information from the pontine nuclei

Answer 5

middle

Question 6

the _______ peduncle receives info from the spinal cord

Answer 6

inferior

Question 7

the ONLY output from the cerebellar cortex, inhibitory (GABA), and project to deep cerebellar nuclei

Answer 7

purkinje cells

Question 8

the ONLY excitatory cell in the cortex, dendrites run parallel to surface, excite the purkinje cells

Answer 8

granule cells

Question 9

inhibited by purkinje cells, project to the thalamus

Answer 9

deep cerebellar nuclei

Question 10

input to cerebellum: from spinocerebellar tracts –> inferior peduncle –> excite many granule cells, simple and graded response

Answer 10

mossy fiber

Question 11

input to cerebellum: inferior olive –> excite a few purkinje cells, all or none response of purkinje cell

Answer 11

climbing fiber

Question 12

somatotopy is maintained throughout cerebellar path, with vermis controlling coordination of _________ and spinocerebrum controlling coordination of ___________

Answer 12

midline and axial trunk, limbs on same side of body

Question 13

cerebellum fine tunes this reflex to ensure correct strength and range

Answer 13

vestibulopostural reflex

Question 14

cerebellum suppressed the vestibulocoular reflex (VOR) when a _______ and ______ are moving in the same direction

Answer 14

target and head

Question 15

suppression of VOR involves purkinje cells inhibiting the?

Answer 15

vestibular nucleus

Question 16

lesions of the cerebellum affect the ________ limb and ________ motor cortex

Answer 16

ipsilateral, contralateral

Question 17

lesions of the __________ produce nystagmus and ataxia

Answer 17

vestibulocerebellum

Question 18

classic childhood tumor of cerebellar vermis and 4th ventricle, lesion of vestibulocerebellum

Answer 18

medulloblastoma

Question 19

presentation of hypotonia, poor coordination, rapid intention tremor, inability to perform rapid alternation, jerky trajectory of complex motion

Answer 19

cerebrocerebellum lesion