Cerebellum, corticopsinal tract and motor system

Question 1

What does the cerebellum do?

Answer 1

-Controls the rate, timing and force of movement (voluntary?) -Tone of muscles - coordinates the muscles of equilibrium

Question 2

What are the parts of the cerebellum and order they came about? Functions

Answer 2

Archicerebellum, in diagram bottom: balance Palaeocerebellum, medial part : muscle tone Neocerebellum, lateral : control of precise rate timing and force

Question 3

What are the inputs to the different parts of the cerebellum?

Answer 3

Archicerebellum: vestibular system (vestibulocerebellar fibres) Palaeocerebellum: muscle spindles (DSCT) and golgi tendon organs/proprioreceptors (VSCT) ( spinocerebellar fibres) Neocerebellum: cerebral cortex -> pontine nuclei (pontocerebellar fibres)

Question 4

Cerebellar note what type of output is cerebellar? (inhibitory/excitatory)

Answer 4

Archicerebellum: Out to Lat Vestibular nucleus and then to LMNS Palaeocerebellum: goes to certain nuclei which take information to LMN’s (reticulospinal path) Neocerebellum: nuclei to thalamus (GLUTAMATE. excitatory), then to UMN area 4 and 6 to then LMN.

Question 5

Cerebellar disease

Answer 5

ATAXIA- uncoordinated movements loss of balance

Question 6

Disease of UMN and LMN

Answer 6

UMN- Spastic paralysis LMN- Flaccid paralysis

Question 7

Note on corticospinal and bulbar tracts.

Answer 7

DRAW