W03_05 Motor Control 3: Cerebellum

Question 1

what volume proportion of the brain does the cerebellum hold?

Answer 1

10%

Question 2

what proportion of neurons does the cerebellum hold?

Answer 2

50%

Question 3

what is the general function of the cerebellum?

Answer 3

refines movements and makes them better. takes input from motor planning and modifies according to sensory input. does not alter strength or sensory perception.

Question 4

name 4 general functions that the cerebellum assists

Answer 4

limb movements
eye movements
speech
balance

Question 5

spinocerebellum consists of which two parts?

Answer 5

vermis and paravermis

Question 6

function of the spinocerebellum?

Answer 6

descending motor systems (i.e. proprioception, stance, posture)

Question 7

function of the cerebrocerebellum?

Answer 7

to motor/premotor cortex;
planning
learning
fine movement of hand

Question 8

function of the vestibulocerebellum?

Answer 8

to vestibular nuclei;
balance
vision

Question 9

neurons of proprioceptors follow which tract up the spinal cord?

Answer 9

spinocerebellar

Question 10

where do outputs from the vestibuloCB and spinoCB project to?

Answer 10

ipsilateral extraocular nuclei for coordinating eyes with head mvmt;
ipsilateral reticulospinal and vestibulospinal tracts for coordinating balance and locomotion

Question 11

pathway of cerebrocerebellum output?

Answer 11

dentate nucleus (cerebrocerebellum);
sup cereb ped.;
red nucleus;
VL thalamus synapse;
motor cortex;

Question 12

name classic symptoms of cerebellar disease

Answer 12

ataxia
dysmetria
intention tremor
dysdiadochokinesia
nystagmus

Question 13

most of the time, cerebellar lesions present on which side of the body?

Answer 13

ipsilateral