2.29 Cerebellum

Question 1

3 functional areas of cerebellum

Answer 1

• vestibulocerebellum
• spinocerebellum
• cerebrocerebellum (via dentate nucleus)

Question 2

vestibulocerebellum has to do with

Answer 2

balance

• equipibrium
• eye movements
• postural muscles

Question 3

spinocerebellum has to do with

Answer 3

gross movement

Question 4

cerebrocerebellum has to do with

Answer 4

finer movement

Question 5

systems that feed into vestibulocerebellum

Answer 5

• visual

- vestibular

Question 6

outcoems of vestibulocerebellum activation

Answer 6

• eye movements

- postural muscle movement

Question 7

The vestibulocerebellum is part of this lobe

Answer 7

flocculonodular lobe

Question 8

spinocerebellum affects these systems

Answer 8

affects both lateral and medial UMN systems

Question 9

3 main inputs to spinocerebellum

Answer 9

• spinocerebellar internal feedback tracts (spinal cord)
• somatosensory
• sensorimotor

Question 10

spinocerebellum outputs

Answer 10

• brainstem

- thalamus

Question 11

spinocerebellum acting on thalamus has effects on

Answer 11

medial and lateral UMN

Question 12

spinocerebellum is part of the

Answer 12

vermis

Question 13

cerebrocerebellum and fine movement

Answer 13

• coordination
• planing
• timing

Question 14

cerebrocerebellum inputs

Answer 14

somatosensory motor cortices » cerebrocerebellum via dentate nucleus

Question 15

specific receptors for cerebrocerebellum

Answer 15

• GTO
• muscle spindles
• cutaneous mechanoreceptors

Question 16

cerebrocerebellum outputs

Answer 16

• motor thalamus

- cerebral cortex

Question 17

cerebrocerebellum outcome

Answer 17

make corrections to movements

Question 18

cerebrocerebellum is part of the

Answer 18

lateral hemispheres

Question 19

primary job of cerebellar peduncles

Answer 19

connect cerebellum to everything else

Question 20

How many cerebellar peduncles?

Answer 20

3

Question 21

cerebellar peduncles: ratio of afferents to efferents

Answer 21

40:1

Question 22

What are the 3 cerebellar peduncles?

Answer 22

• inferior
• middle
• superior

Question 23

inferior cerebellar peduncle receives afferents from

Answer 23

contralateral inferior olivary nucleus (ION)

Question 24

What does the ION connect?

Answer 24

ION connects spinal cord and brainstem to the cerebellum

Question 25

Which peduncle is the largest?

Answer 25

middle (has 20 million fibers)

Question 26

middle peduncle is (afferent/efferent)

Answer 26

afferent

Question 27

afferent fibers to the middle peduncle come from

Answer 27

pontine nuclei

Question 28

What does the middle peduncle connect?

Answer 28

cortex to pons to cerebellum

Question 29

superior peduncle is (afferent/efferent)

Answer 29

efferent

Question 30

Where does the superior peduncle run?

Answer 30

goes to brainstem and thalamic nuclei

Question 31

What two things are constantly making modifications to movement?

Answer 31

- cerebellum | - basal ganglia

Question 32

3 blood supplies to cerebellum

Answer 32

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

Question 33

SCA comes off the

Answer 33

basilar artery

Question 34

AICA comes off the

Answer 34

basilar artery

Question 35

PICA comes off the

Answer 35

vertebral arteries