Motor control: cerebellum Flashcards Preview

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Flashcards in Motor control: cerebellum Deck (12):
1

what are 3 functional output lobes of the cerebellum and their functions

1. spinocerebellum - descending motor systems
2. cerebrocerebellum - motor planning and fine movements
3. vestibulocerebellum - to vest. nuc for balance and eye movements

2

what are 4 input regions of cerebellum

1. corticopontine
2. spinal
3. visual/auditory
4. vestibular

3

what input is received from the cortex

planned movement info

4

what 3 other area does the cerebellum get info from

1. visual and aut - colliculi
2. vestibular apparatus
3. proprioceptors

5

where does cerebellum output go (2)

1. extraoccular for eye movements
2. medial and lateral descending paths for movement

6

** what happens for fine motor movements

decussates from cerebellum to dentate nucleus and decussates back to body (same side damage)

7

3 brainstem lesions that can mimick cerebellar

1. midbrain at level of sup. colliculus
2. lesion of lateral pons including cerebellar peduncle
3. lesion of lateral aspoct of rostral medulla

8

** 5 key Sx of cerebellar lesions

1. ataxia
2. dysmetria
3. intention tremor
4. dysdiadokinesia
5. nystagmus

9

what is ataxia

staggering wide base. lurching

10

what is dysmetria

failure in coordinating accuracy of movements - finger nose test

11

what is dysdiadokinesia

failure to maintain rate of movement - slow clap

12

what is nystagmus

back and forth eye movements

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