anatomy: cerebellum

Question 1

weight of cerebellum

Answer 1

150g …1/10 of total brain

Question 2

cerebellum located in

Answer 2

post cranial fossa

Question 3

what is the tentorium cerebelli

Answer 3

infolding of dura mater that separates occipital and temporal lobe from cerebellum and brainstem

Question 4

how does cerebellum communicate w brainstem

Answer 4

via sup , middle and inf cerebellar peduncles

Question 5

cerebellum functions

Answer 5

gait and balance
coordination accuracy precision of movement
motor learning
reflex modification

Question 6

longitudinal divisions of cerebellum

Answer 6

vermis
paravermal region
cerebellar hemispheres

Question 7

transverse division

Answer 7

anterior lobe
posterior lobe
flocculonodular lobe

Question 8

• ant and post lobe separated by ….

- post and flocculonodular lobe separated by…

Answer 8

• primary fissure

- posterolateral fissure

Question 9

4 cerebellar nuclei Lateral -> Medial

Answer 9

dentate (cerebellar hemisphere)
globose (paramedian zone)
emboliform (paramedian zone)
fastigial (vermis)

Question 10

HISTOLOGY OF CEREBELLAR CORTEX: 3 layers from top to bottom

Answer 10

molecular
purkinje
granule

Question 11

HISTOLOGY OF CEREBELLAR CORTEX: 5 cell types

Answer 11

purkinje
granule
golgi
basket
stellate

Question 12

CEREBELLAR CIRCUITRY (Projections to the Cerebellum)

Answer 12

cerebral cortex–>pons –>mid cerebellar ped —>CEREBELLAR CORTEX

vestibular nuclei/inferiorn olives/spinal cord–> inf cerebellar ped–> CEREBELLAR CORTEX

Question 13

dentate nucleus
location
function

Answer 13

cerebellar white matter

planning control and initiation of voluntary movements

Question 14

globose and emboliform nucleus (aka the interposed nucleus)

function

Answer 14

coordinating against agonist/antagonist muscle pairs

Question 15

FUNCTIONAL DIVISIONS

Answer 15

vestibulocerebellum — contains flocculus and nodulus
spinocerebellum—– made up of vermis and paravermis
cerebrocerebellum—–two lateral regions of the cerebellar hemispheres

Question 16

function of vestibulocerebellum

Answer 16

regulates balance and reflex eye movements

Question 17

function of spinocerebellum

Answer 17

stance and gait

controls muscle tone

Question 18

function of cerebrocerebellum

Answer 18

planning and initiation of skilled movements

Question 19

Summary of the Cerebral Peduncles:

• superior cerebellar peduncle
• middle cerebellar peduncle
• inferior cerebellar peduncle

Answer 19

• PRIMARY OUTPUT pathway from deep cerebellar nuclei
• an INPUT pathway from cerebral cortex
• INPUT from spinal cord , brainstem, inf olive and output to brainstem

Question 20

what type of control does cerebellum have

Answer 20

ipsilateral … controls movement on same side of body