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neuro - block 2 > cerebellum (dr. driscoll) > Flashcards

cerebellum (dr. driscoll) Flashcards

1
Q

what are the three cortico- tracks and where do they terminate

A

corticospinal: motor cortex to ventral horn of spinal chord

corticobulbar: motor cortex to inferior olive

corticopontine: motor cortex to pontine nuclei/cells

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2
Q

what cerebellar peduncle does the posterior spinocerebellar tract go through

A

inferior cerebellar peduncle

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3
Q

what peduncle does the olivocerebellar tract go through

A

inferior cerebellar peduncle

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4
Q

what peduncle do the mossy fibers come from

A

middle cerebellar peduncle

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5
Q

what peduncle does the pontocerebellar tract go through

A

middle cerebellar peduncle

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6
Q

the mossy fibers are (excitatory/inhibitory)

A

weakly excitatory

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7
Q

the climbing fibers are (excitatory/inhibitory)

A

STRONGLY excitatory

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8
Q

the olivocerebellar tract projects to/synapses in the BLANK and BLANK

A

deep cerebellar nuclei and cerebellar cortex

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9
Q

the pontocerebellar tract/mossy fibers project to/synapses in the BLANK and BLANK

A

deep cerebellar nuclei and cerebellar cortex

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10
Q

the posterior spinocerebellar tract terminates/synapses in the BLANK

A

cerebellar cortex

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11
Q

where does excitatory input to the pirkinge cells in cerebellar cortex come from

A

mossy fibers and climbing fibers

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12
Q

where does the axon of purkinge cells project to

A

deep cerebellar nuclei

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13
Q

the cerebellodentothalamic tract goes from the BLANK through the BLANK and projects to the BLANK

A

deep cerebellar nuclei through the superior cerebellar peduncle and projects to the VL of thalamus

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14
Q

the cerebellodentorubral tract goes from the BLANK through the BLANK and projects to the BLANK

A

deep cerebellar nuclei through the superior cerebellar peduncle and projects to the red nucleus

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15
Q

purkinje cells are excitatory/inhibitory

A

inhibitory (GABA)

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16
Q

4 pillars/functions of cerebellum

A
  1. synergy
  2. comparison
  3. prediction
  4. control/brakes
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17
Q

synergy (cerebellum) function/meaning

A

rapid processing of info + changes in speach/movement

18
Q

comparison (cerebellum) function/meaning

A

rapid correction

19
Q

prediction (cerebellum) function/meaning

A

rapid prediction + anticipation of whats going to happen

20
Q

control/brakes (cerebellum) function/meaning

A

being able to stop movement + speech when needed/appropriate

21
Q

what makes up the archicerebellum

A

floculonodular lobe (floculus + nodulus)

22
Q

what makes up the paleocerebellum

A

anterior lobe and vermis

23
Q

what makes up the neocerebellum

A

posterior lobe

24
Q

what is the function of the archicerebellum

A

ballance and positioning, works w/vestibular system (vestibular nuclei in brainstem and semicircular canals)

24
Q

paleocerebellum funcion

A

muscle tone (specifically muscles of trunk)

25
Q

neocerebellum function

A

skilled voluntary movements

26
Q

most damage to cerebellum results in ipsi/contralateral damage

A

ipsilateral damage (bc crosses once on way into cerebellum and once on way out, cancel eachother out)

27
Q

the inferior cerebellar peduncle contains the BLANK and BLANK, info from BLANK, and info from BLANK

A

posterior spinocerebellar tract, info from reticular formation (alternes), info from vestibular nuclei (balance), olivocerebellar tract (climbing fibers, strongly excitatory)

28
Q

the middle cerebellar peduncle contains BLANK tract

A

pontocerebellar tract (mossy fibers, weakly excitatory)

29
Q

the superior cerebellar peduncle contains BLANK and BLANK tracts

A

cerebelodentatothelamic tract and cerebelodentatorubral tract

(output from deep cerebellar nuclei)

30
Q

climbing fibers do what to purkinge cells

A

wrap around purkinge dendrites and are STRONGLY excitatory

31
Q

mossy fibers do what in cerebellar cortex

A

excited granular cells in granular cell layer that then send branching axons (paralell fibers) up to purkinge cell layer where they WEEKLY excite the purkinge dendrites

32
Q

basket cells do what in the cerebellar cortex

A

wrap around purkinge cell bodies and INHIBIT purkinge cells

33
Q

damage to archicerebellum results in BLANK

A

balance problems

34
Q

damage to the anterior cerebellum/paleocerebellum results in BLANK

A

posture distubances

35
Q

damage to neocerebellum results in BLANK or BLANK, BLANK, and/or BLANK + BLANK

A

distonia or hypotonia, dysarthria, asynergia + dysynergia

36
Q

distonia/hypotonia definition

A

too little muscle tone (floppy), to much muscle tone (rigidity)

37
Q

intention tremor definition

A

tremor during purposeful action (reaching for something, looking in specific direction)

38
Q

asynergia + dysynergia definition

A

lack of rebound control

includes:
- dismetria
- decomposition of movement
- dysdiadochokinesis

39
Q

dismetria dfinition

A

reaching to far for things/inability to stop actions

40
Q

dysdiadochokinesis definition

A

inability to perform rapid, alternating movements

neuro - block 2 (9 decks)

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