Cerebellum

Question 1

Functions

Answer 1

mid-course corrections of movement

Question 2

Pathologies

Answer 2

incoordination (dysarthria, dysmetria, dysdiaochokinesis), movement tremor

Question 3

From where does the cerebellum receive input from?

Answer 3

muscles and motor cortex/brain stem

Question 4

Where does cerebellum send its output?

Answer 4

to the motor cortex/brain stem

Question 5

Describe how the cerebellum interprets things

Answer 5

Motor commands are compared with proprioceptive (muscle) feedback

Question 6

What are the two functional regions of the cerebellum?

Answer 6

medial and lateral cerebellum

Question 7

What structure is in the medial cerebellum?

Answer 7

vermis, deep cerebellar nuclei (fastigial)

Question 8

Where does the medial cerebellum receive input from?

Answer 8

vestibular nuclei

Output to: vestibular nuclei to control balance

Question 9

dentate nucleus is found where?

Answer 9

lateral cerebellum

Question 10

input/output of cerebellum

Answer 10

output: pre motor cortex to control motor planning, initiation and timing of movements
input: contralateral motor cortex

Question 11

Superior cerebellar peduncle

Answer 11

contains mostly efferents which decussate under the superior colliculi of the midbrain and project to contralateral thalamus

Question 12

middle cerebellar peduncle

Answer 12

mostly afferent fibers; largest of the peduncles and is the only one visible from the surface of the brain stem

Question 13

Inferior cerebellar peduncle

Answer 13

mostly afferents, arise from locations including Clarke’s nucleus of T spine