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anatomy block 4 > Cerebellum part 2 > Flashcards

Cerebellum part 2 Flashcards

1
Q
A
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2
Q

medial longitudinal fasiculus (MLF)

A

vestibular nucleus sends axons thru MLF to CN III, IV, VI

nuclei

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3
Q

axons sent thru MLF to CN III, IV, VI

nuclei

A

bilateral in

Vestibulocerebellar System

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4
Q

mooth pursuit

A

allows the eyes to follow a moving stimulus (maintains the stimulus on the fovea)

needs the cerebllum

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5
Q

smooth pursuit

Cortical eye fields –>vest nuclei–> Cb –> vestibular nucleus –> CN III, IV, VI nuclei via the MLF

A

Cortical eye fields –> pontine nuclei –> Cb –> vestibular nucleus –> CN III, IV, VI nuclei via the MLF

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6
Q

The cerebellum compares the—– ——with the intended movement and ——– the required corrections to maintain —— and proper eye position .

A

The cerebellum compares the vestibular input with the intended movement and “computes” the required corrections to maintain equilibrium and proper eye position .

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7
Q

Generalized loss of equilibrium

A

Lesion of the Vestibulocerebellum

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8
Q

Impaired ability to coordinating eye movements with head movements

A

Lesion of the Vestibulocerebellum

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9
Q

Altered output along medial vestibulospinal tract – Altered output along MLF

A

Lesion of the Vestibulocerebellum

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10
Q

Carries proprioceptive information trunk & LEs (T1 and below)

A

tPosterior Spinocerebellar Tract

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11
Q

tCuneocerebellar Tract

A

Carries proprioceptive information neck & UEs (rostral to T1)

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12
Q

Anterior Spinocerebellar Tract

A

proprioceptive information and cutaneous information

from receptors with large receptive fields from LEs

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13
Q

Carries proprioceptive information from the oral cavity

A

Trigeminocerebellar Tract

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14
Q

Propriceptive afferents travel in dorsal column

of Posterior Spinocerebellar Tract and travel to

A

Clarke’ s Column T1 - L2

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15
Q

Axons travel superiorly within the

A

posterior spinocerebellar tract

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17
Q

Posterior spinocerebellar tract travels thru

A

Inferior cerebellar peduncle

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18
Q

tf Posterior Spinocerebellar Tract only travel to vermis

A

F vermis and paravermis

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19
Q

TF Cuneocerebellar Tract

Axons travel in the dorsal column (fasciculus cuneatus) to med/ internal/ accessory cuneate nucleus

A

Cuneocerebellar Tract

Axons travel in the dorsal column (fasciculus cuneatus) to Lateral/ external/ accessory cuneate nucleus

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20
Q

TF Cuneocerebellar Tract uses Clarke’s Column T1 - L2

A

F

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21
Q

propriceptive afferents from C1-C8

A

Cuneocerebellar Tract

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22
Q

Ipsilateral

A

Cuneocerebellar Tract

Posterior Spinocerebellar Tract

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23
Q

travels contralat then contralat back to same side

(after ascending)

A

Anterior Spinocerebellar Tract

24
Q

Superior cerebellar peduncle

A

Anterior Spinocerebellar Tract

fibers

25
Q

both use Inferior cerebellar peduncle

A

Cuneocerebellar Tract

Posterior Spinocerebellar Tract

26
Q

Primary afferents synapse on spinal border cells (T2-L5)

A

Anterior Spinocerebellar Tract

27
Q

Trigeminocerebellar Tract

A

Proprioceptive info carried along branches of CN-V (ie. muscles of mastication, periodontal ligament)

28
Q

Proprioceptive info carried along branches of CN-V (ie. muscles of mastication, periodontal ligament) carried to

trigerm. cerebellar tract

A

spinal trigeminal nucleus.

29
Q

Axons from the spinal trigeminal nucleus project to the cerebellum

trigem cereblar tract

A

via the inferior cerebellar peduncle.

30
Q

trigeminoceebellar tract

cerebellum influences motor output by projecting to the

A

trigeminal motor nucleus.

31
Q

This circuit allow the oral motor system to receive —— ——— during mastication

trgemcerebellar tract

A

This circuit allow the oral motor system to receive continual feedback during mastication

32
Q

The cerebellum monitors the —— ——- on muscles of mastication and influences —— output accordingly.

trigem. cerebllar tract

A

The cerebellum monitors the changing demands on muscles of mastication and influences motor output accordingly.

33
Q

(ant post)Spinocerebellar and Trigeminocerebellar Tract

functions

A

After processing proprioceptive information in cerebellum , cerebellar efferents project to motor regions, either directly or indirectly via the thalamus.

allows for adjustment of movement during ongoing movement

34
Q

Functions Spinocerebellar and Trigeminocerebellar Tracts

A

The cerebellum compares the intended movement with the actual movement and “computes” the required corrections.

Efferent projections from the cerebellum corrects the movement

35
Q

Corticospinal tract and Rubrospinal tract

A

act modulate motor output in the Spinocerebellar System in the Proprioceptive afferents responce

36
Q

synapse in red nucleus

A

Rubrospinal tract efferent responce

37
Q

contralateral to the skeletal muscle

A

Corticospinal tract and Rubrospinal tract

(Spinocerebellar System afferent responce)

38
Q

Impaired ability to control axial muscles/ impaired trunk control

A

Lesion of the Spinocerebellum

39
Q

Altered rate, range, accuracy of limb movements

A

Lesion of the Spinocerebellum

40
Q

Dysmetria (overshooting a target)

A

lead to Intention Tremor

in Lesion of the Spinocerebellum

and inLesion to the Cerebrocerebellum

41
Q

Dysmetria

A

Rely on the feed-back

43
Q

inf olive role in cerebrocellebellar tract

A

recieves input from dentate(from cerebellar hemisphere)

then has to correct and send climbing fibers to lat hemisphere of cerebellum

44
Q

Receives extensive input from the cerebral cortex (via pontine nuclei)

A

cerebellum in the

Cerebrocerebellar System

45
Q

Involved in the planning, initiation, timing and control of motor movements.

A

cerebellum

46
Q

VA/VL

A

recieves neurons from dentate

and sends neurons to motor cortex to modulate activity

47
Q

Pontine nuclei

A

recieves infor fromcerebral cortex and sends info to lateral hemishphere of Cerebelum

48
Q

climbing fibers

A

goes thru Inferior cerebellar peduncle to cerebellum(lat hemisphere)

49
Q

Middle cerebellar peduncle

A

carries axons from pontne nucleus to lat cerebellum

50
Q

contralat

A

Corticospinal and Rubrospinal Tracts

51
Q

The cerebellar hemisphere compares the —- movement with the —– movement and “computes” the required corrections for the next time the task is performed.

A

The cerebellar hemisphere compares the intended movement with the actual movement and “computes” the required corrections for the next time the task is performed.

52
Q

—— projections from the cerebellum corrects the movement via the —– tract.

A

Efferent projections from the cerebellum corrects the movement via the corticospinal tract.

53
Q

Studies on non-human primates

reversible cooling in the —– nucleus resulted in delayed —– of movement.

A

reversible cooling in the dentate nucleus resulted in delayed onset/initiation of movement.

Lesion to the Cerebrocerebellum

54
Q

Movement takes place —– rather than being coordinated smoothly

A

Lesion to the Cerebrocerebellum

55
Q

Impaired ability to plan motor movement

A

seen with inactivating the interposed [globos/emboliform] in monkeys

Lesion to the Cerebrocerebellum

anatomy block 4 (16 decks)

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