Cerebellum-Sievert

Question 1

What is the primary fcn of the cerebellum?

Answer 1

to detect difference in intended movement & actual movement (motor error)

Question 2

T/F Neuronal activity of the cerebellum is relatively static.

Answer 2

False. It is quite dynamic. continually changing while someone is performing a movement

Question 3

Patients with cerebellar damage exhibit which problems?

Answer 3

problems with range, rate, and direction of movement
this includes:
cerebellar ataxia
dysmetria
dysdiadochokinesia
tremo

Question 4

What is cerebellar ataxia?

Answer 4

this is like the bar walk

Question 5

What is dysmetria?

Answer 5

this is where you can’t follow a finger, oscillate & overshoot or undershoot

Question 6

What is dysdiadochokinesia?

Answer 6

inability to perform rapid alternating movements

pancake hands not possible

Question 7

What does a tremor caused by cerebellar damage look like?

Answer 7

an intention tremor with dominant end point feature

fine when you are sitting, but when you are asked to perform a movement-tremor.

Question 8

Where does the cerebellum receive info from?

Answer 8

receives information from proprioceptors of the body via the dorsal spinal cerebellar tract.
Also receives info from the cortex (this is what I’ve told the muscles to do, cerebellum, let me know if they do it or not).
makes a comparison…sends info back to the cortex.

Question 9

What type of attachments are the cerebellar peduncles involved in? How many are there?

Answer 9

attach the cerebellum to the brainstem
Superior
Inferior
Middle

Question 10

What’s the deal with the superior peduncle?

Answer 10

this is an outflow peduncle

it heads superiorly towards higher centers

Question 11

What’s the deal with the inferior peduncle?

Answer 11

this is an inflow peduncle

the info comes from the spinal cord

Question 12

What’s the deal with the middle peduncle?

Answer 12

this is the largest, most massive peduncle & comes out of the pontine nuclei
its info goes straight down below

Question 13

What are the special little jewels that you find in the inner white matter of the cerebellum?

Answer 13

these are the deep cerebellar nuclei

the fastigial, globus, emboliform, dentate nuclei

Question 14

What do the globus & emboliform nuclei combine to form?

Answer 14

they make up the interpositous nuclei.

Question 15

T/F The cerebellar zones each match with a different set of nuclei.

Answer 15

True! There are 3 & 3.

Question 16

What can you see on the ventral surface of the cerebellum?

Answer 16

see the 3 peduncles
see flocculonodular lobe
see vermis
etc.

Question 17

Which areas of the ventral cerebellum make up the spinocerebellar lobe? What is this lobe responsible for?

Answer 17

the vermis, midline, & paramedian areas

**day to day activities, planned, controlled movements

Question 18

Which areas of the ventral cerebellum make up the cerebrocerebellum? What is this lobe responsible for?

Answer 18

the lateral lobes
**planning & organization of movement
premotor cortex communicates with it

Question 19

Which areas make up the vestibulocerebellum? What is this lobe responsible for?

Answer 19

the flocculus on both sides
the nodulus in the middle
**posture & gait

Question 20

T/F Only the spinocerebellum carries out the stereotypical cerebellar fcn of comparing the cortex’s instructions w/ muscles’ actions.

Answer 20

FALSE. All parts of the cerebellum carry out this function in their own ways.

Question 21

Give more detail about the function of the spinocerebellar lobe.

Answer 21

receives input from spinal cord about muscles spindles

receives input from cortex about execution of movements & fine control of distal & proximal muscles

Question 22

Give more detail about the function of the cerebrocerebellar lobe.

Answer 22

receives input from motor & premotor cortex & sensory association areas related to planning of movements
**largest area of the cortex
has the most inputs & outputs

Question 23

Give more detail about the function of the vestibulocerebellar lobe.

Answer 23

receives input from vestibular system & visual system to control eye movements & balance

Question 24

Which of the deep nuclei is the cerebrocerebellum associated with?

Answer 24

the most laterally located deep nuclei

dentate nuclei

Question 25

Which of the deep nuclei is the spinocerebellum associated with?

Answer 25

the fastigial & interpositus nuclei

Question 26

Which nuclei are the vestibulocerebellum associated with?

Answer 26

the vestibular nuclei…these are outside of the brainstem.

Question 27

The right half of the cerebellum has control over which side of the body?

Answer 27

the right side of the body

Question 28

When the cortex talks to the cerebellum or the cerebellum talks to the cortex…do they talk via the same side or opposite sides?

Answer 28

opposite sides

Question 29

When the spinal cord or vestibular nuclei talk to the cerebellum…do they remain on the same side or do they cross?

Answer 29

they remain ipsi

Question 30

Proprioceptors from the right arm end up at which part of the cerebellum?

Answer 30

they end up at the right cerebellum