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Flashcards in cerebellum Deck (25)
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1

what is the function of the cerebellum?

- motor control
- active in coordination, precision and timing of movements

2

during embryonic development, what does the anterior portion of the neural tube form?

3 parts:
- forebrain (prosencephalon)
- midbrain (mesencephalon)
- hindbrain (rhombencephalon)

3

what does the hindbrain then divide into?

- metencephalon (superior)
- myelencephalon (inferior)
- cerebellum develops from metencephalon

4

what separates the cerebellum from the pons?

4th ventricle

5

what connects the cerebellum 2 hemispheres?

the vermis

6

what is the grey matter of the cerebellum?

located on surface of cerebellum
tightly folded, forming cerebellar cortex

7

what is the white matter of the cerebellum?

- located underneath cerebellar cortex
- embedded in white matter are 4 cerebellar nuclei

8

what are the 3 ways that the cerebellum can be subdivided?

- anatomical lobes
- zones
- functional divisions

9

what are the 3 anatomical lobes?

- anterior lobe
- posterior lobe
- flocculonodular lobe

10

what are these lobes divided by?

2 fissures
- primary fissure
- posterolateral fissure

11

what are the three cerebellar zones?

- midline of cerebellum is vermis
- either side of vermis = intermediate zone
- lateral to intermediate zone are lateral hemispheres

12

what are the 3 functional areas of cerebellum?

- cerebrocerebellum
- spinocerebellum
- vestibulocerebellum

13

where is the cerebrocerebellum? what is its function?

- largest division
- formed by lateral hemispheres
- involved in planning movements and motor learning
- regulates coordination of muscle activation
- important in visually guided movements

14

what does the cerebrocerebellum receive input from?

from cerebral cortex and pontine nuclei

15

where does the cerebrocerebellum sends outputs to?

thalamus and red nucleus

16

what is the spinocerebellum comprised of?

vermis and intermediate zone of cerebellar hemispheres

17

what is the spinocerebellum involved in?

- regulating body movements by allowing for error correction
- receives proprioceptive info

18

what is the vestibulocerebellum?

functional equivalent to the flocculonodular lobe

19

what is the function of the vestibulocerebellum?

- controlling balance and ocular reflexes (mainly fixation of target)
- receives inputs from vestibular system
- sends outputs back to vestibular nuclei

20

what does the cerebellum receive its blood supply from?

- superior cerebellar artery (SCA)
- anterior inferior cerebellar artery (AICA)
- posterior inferior cerebellar artery (PICA)

21

what are the SCA and AICA branches of?

basilar artery

22

what is the PICA a branch of?

vertebral artery

23

what is the venous drainage of the cerebellum?

by superior and inferior cerebellar veins

24

what are the manifestations of cerebellar dysfunction?

DANISH
Dysdiadochokinesia (difficulty in carrying out rapid, alternating movements)
Ataxia
Nystagmus
Intention tremor
Scanning speech
Hypotonia

25

what does damage to the vestibulocerebellum manifest with?

loss of balance
abnormal gait
wide stance