ANAT cerebellum

Question 1

F(x) of cerebellum

Answer 1

coordinate movements
maintain posture
motor learning

Question 2

organization of gray matter

name the layers

Answer 2

molecular layer
purkinje layer
granular layer

Question 3

what are the output cells of the cerebellar cortex

what NT

Answer 3

purkinje cells – GABA

Question 4

what are the only excitatory neurons in the gray matter

what NT

Answer 4

granule cells – glutamate

Question 5

what synapses with purkinje cells

what do they do

Answer 5

basket cells

inhibit purkinje cells using GABA

Question 6

types of afferent fibers

cerebellar cortex

Answer 6

climbing fibers (from inferior olive – only source –>
synapse w/ purkinje cells)
mossy fibers

Question 7

climbing fibers
effect
what do they do

Answer 7

from inferior olive
excitatory influence on purkinje cells
conveys info about movement errors to cerebellum

Question 8

mossy fibers
from
synapse w/

Answer 8

from spinal cord, reticular formation, vestibular formation, pontine nuclei
synapse w/ granulocytes

Question 9

vestibulocerebellum
where does info come from
where does output go
f(x)s

Answer 9

receives info from vestibular receptors
sends output to vestibular nuclei
f(x): influences eye movements and postural muscles
of head and body

Question 10

spinocerebellum

Answer 10

vermis + paravermal region
f(x) to control ongoing movement via the brainstem
descending tracts

Question 11

pontocerebellum (cerebrocerebellum)

Answer 11

input from cerebral cortex via pontine nuclei
f(x) in corrdination of voluntary movements, planning of
movements, and timing

Question 12

what is the nucleus dorsalis of clark

Answer 12

gray matter from C8-L2

Question 13

which tracts carry unconscious proprioception from a limb

Answer 13

posterior spinocerebellar tract (LE)
cuneocerebellar tract (UE)

Question 14

what synapses in the dorsal nucleus of clark

Answer 14

1st order neurons of posterior spinocerebellar tract

Question 15

which fibers run through the superior cerebellar peduncle

Answer 15

efferent fibers from globose, emboliform, dentate nuclei

afferent fibers from anterior spinocerebellar

Question 16

vestibulocerebellum f(x)

Answer 16

eye movements

neck and trunk movements

Question 17

spinocerebellum f(x)

Answer 17

axial and LE movements

gait and station

Question 18

cerebrocerebellum f(x)

Answer 18

precise coordinated movements of extremities

mainly UE

Question 19

what are the deep nuclei

Answer 19

fastigial, dentate, globose, emboliform

Question 20

lesions of vestibulocerebellum sx

Answer 20

nystagmus
truncal ataxia
truncal instability (titubation)

Question 21

midline ataxia definition

Answer 21

ataxic syndromes caused by vestibulocerebellar and spinocerebellar disease
truncal instability – titubation, gait ataxia
equilibratory ataxias – gait ataxia

Question 22

lesions of cerebrocerebellum sx

Answer 22

dysarthria
ataxic gait
decomposition of movements
limb ataxia
    dysdiadochokinesia
    dysmetria
    action tremor