Lecture 10 Flashcards Preview

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Flashcards in Lecture 10 Deck (19):
1

What are the 3 lobes of the cerebellum?

Anterior, posterior and FNN lobes
(FNN = flocculonodular)

2

How do outputs leave the cerebellum?

Cerebellar cortex sends axons to deep cerebellar nuclei
Axons from deep cerebellar nuclei leave via superior cerebellar peduncles that CROSS the midline --> cerebral cortex

3

What is the gyri equivalent in the cerebellum?

Folia

4

What separates the anterior and posterior lobes of the cerebellum?

Primary fissure

5

Which 3 spinal tracts interact with the cerebellum? Include laterality.

Dorsal (ipsi), ventral (ipsi but double crosser) spinocerebellar tracts
Cuneo-cerebellar tract (ipsi)

6

What are the 4 major brain stem inputs into the cerebellum? Include where in the cerebellum these go.

1. Vestibular nuclei --> FNN & vermis
2. Inferior olive --> cerebellar cortex
3. Spinal (reticular info) & trigeminal --> intermediate zone & vermis
4. Pons --> hemispheres

7

Which part of the cerebellum specifically receives visual and auditory inputs?

Central part of vermis

8

Which peduncle sends output to the vestibular nuclei?

Inferior!
Because the vestibular nucleus is low!

9

Where do each of the 3 spine input tracts enter into the cerebellum (peduncle)?

Dorsal SC & CC - inferior peduncle
Ventral SC - superior

10

What are the 2 contralateral input sources into the cerebellum?

Cerebral cortex via pons (middle peduncle)
Inferior olive (inferior peduncle)

11

What are the ipsilateral input sources into the cerebellum?

Anything coming from below/spine
Vestibular nucleus

12

What are the 3 deep cerebellar nuclei? Lateral --> medial

Dentate (lateral)
Interposed (2 of these)
Fastigial (medial)

13

What is the laterality of the majority of cerebellar outputs?

CONTRA
R cerebellum will send outputs to L cerebrum

14

Which of the 4 parts of the cerebellum send outputs to which of the deep nuclei?

Vermis - fastigial
Intermediate zone - interposed
Hemispheres - dentate
FNN - fastigial

15

What is the role the FNN lobe?

Balance and eye movements

16

What is the function of the (lateral) hemispheres?

Motor planning

17

What is the function of the vermis and intermediate zones?

Motor execution and control of prox & distal muscles

18

Describe the vestibulocerebellum relationship/pathway.

Vestibular apparatus --> vestibular nerve --> inferior peduncle --> FNN --> fastigial nuclei --> inferior peduncle --> vestibular nucleus --> motor cranial nucleus that controls eye movement

19

What are some motor abnormalities that may be seen with cerebellar lesions? What is the laterality?

Hypotonia, ataxia, tremors
IPSILATERAL