Cerebellum part 2 Flashcards Preview

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Flashcards in Cerebellum part 2 Deck (54)
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medial longitudinal fasiculus (MLF)

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

nuclei

 

3

axons sent  thru MLF to CN III, IV, VI

nuclei

bilateral in

Vestibulocerebellar System

4

mooth pursuit

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

 

needs the cerebllum

5

smooth pursuit

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

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

6

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

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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Generalized loss of equilibrium

Lesion of the Vestibulocerebellum

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Impaired ability to coordinating eye movements with head movements

Lesion of the Vestibulocerebellum

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Altered output along medial vestibulospinal tract – Altered output along MLF

Lesion of the Vestibulocerebellum

10

Carries proprioceptive information trunk & LEs (T1 and below)

tPosterior Spinocerebellar Tract

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tCuneocerebellar Tract

Carries proprioceptive information neck & UEs (rostral to T1)

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Anterior Spinocerebellar Tract

proprioceptive information and cutaneous information

from receptors with large receptive fields from LEs

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Carries proprioceptive information from the oral cavity

Trigeminocerebellar Tract

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Propriceptive afferents travel in dorsal column

of Posterior Spinocerebellar Tract and travel to 

Clarke’ s Column T1 - L2

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Axons travel superiorly within the

posterior spinocerebellar tract

17

 

Posterior spinocerebellar tract travels thru

Inferior cerebellar peduncle

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tf Posterior Spinocerebellar Tract only travel to vermis

F vermis and paravermis

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TF Cuneocerebellar Tract

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

Cuneocerebellar Tract

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

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TF Cuneocerebellar Tract uses Clarke’s Column T1 - L2

F

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propriceptive afferents from C1-C8

Cuneocerebellar Tract

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Ipsilateral

Cuneocerebellar Tract

Posterior Spinocerebellar Tract

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travels contralat then contralat back to same side

(after ascending)

Anterior Spinocerebellar Tract

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Superior cerebellar peduncle

Anterior Spinocerebellar Tract

fibers 

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both use Inferior cerebellar peduncle

Cuneocerebellar Tract

Posterior Spinocerebellar Tract

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

Anterior Spinocerebellar Tract

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Trigeminocerebellar Tract

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

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

trigerm. cerebellar tract 

spinal trigeminal nucleus.

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Axons from the spinal trigeminal nucleus project to the cerebellum

trigem cereblar tract

via the inferior cerebellar peduncle.

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trigeminoceebellar tract

cerebellum influences motor output by projecting to the

trigeminal motor nucleus.

31

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

 

trgemcerebellar tract

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