Cerebellum

Question 1

Cerevellar ataxia is

Answer 1

loss of coordination of our muscle movements which will result in a tremor

Question 2

Cerebellar problems affect the

Answer 2

same side (ipslateral movements)

Question 3

Largest part of the hindbrain is the

Answer 3

cerebellum

Question 4

Cerebellum has how many hemispheres?

Answer 4

2 hemispheres joined by vermis

Question 5

Cerebellum is concerned with

Answer 5

posture and voluntary movement

Question 6

What is the function of cerebellum

Answer 6

error correction & motor learning; smooth contract. of muscle groups; coordinated activity of agonists & antagonists (synergy)

Question 7

Cb hemispheres exert

Answer 7

effects on ipsilateral side

Question 8

In voluntary skeletal muscle movements, when I move my right hand,

Answer 8

it was elicited by the left cortical side

Question 9

Cb has no direct pathways

Answer 9

to lower (spinal ) motoneurones

Question 10

Where does Cb exert its effects

Answer 10

via projections to brainstem & cerebral cortex

Question 11

What are 3 lobes of cerebellum

Answer 11

Anterior, posterior, flocculonodular lobe

Question 12

Cerebellar cortex is

Answer 12

highly folded surface and is referred to as folia (leaves)

Question 13

Arbor vitae is the

Answer 13

tree of life (white matter)

Question 14

What are the 3 major tracts (peduncles)?

Answer 14

superior, middle & inferior cerebellar peduncle

Question 15

Superior cerebellar peduncle is

Answer 15

carrying efferent away from Cb to midbrain (red nucleus, superior colliculus) & thalamus to cortex

Question 16

Middle cerebellar peduncle (biggest)

Answer 16

crossed fibres from pontine nuclei (from cortex to pons) (helps enter Cb)

Question 17

Inferior cerebellar peduncle carries

Answer 17

mostly afferent from SC & BS
Efferent to BS

Question 18

Afferent projections arise from cortex via

Answer 18

pontine nulei (MCP); red nucleus and inferior olive (ICP); spinal cord; vestibular nuclei (ICP)

Question 19

All efferent projections arise from

Answer 19

deep cerebellar nuclei, except vestibulocerebellum projection to vestibular nuclei

Question 20

Spinocerebellum consists of

Answer 20

vermis and intermediate hemisphere

Question 21

Cerebrocerebellum is the

Answer 21

lateral hemisphere - from cerebral cortex - planning/coordination of high skilled movement + speech production (temp seq)

Question 22

Vestibulocerebellum consists of

Answer 22

flocculonodular lobe (not visible); maintain balance & posture & eye control; from vestibular labryinth (ear)

Question 23

Spinocerebellum projects from

Answer 23

somatic sensory inputs from trunk & limbs - controlling posture & movement - goes through the intermediate

Question 24

Deep cerebellar nuclei (medial to lat) (4 bilaterally paired)

Answer 24

Fastigial, globose, emboliform, dentate

Question 25

Globose and emboliform form

Answer 25

interpositus

Question 26

Lateral hemispheres have

Answer 26

cortical inputs - dentate nucleus - planning movements

Question 27

Intermediate zone (spinal cord) are

Answer 27

interposed nucleus - adjusting limb movements

Question 28

Vermis (spinal cord) -

Answer 28

fastigial & vestibular nucleus - postural adjustments

Question 29

Flocculonodular lobe (vestibular nuclei)

Answer 29

balance and equilibrium & eye movement

Question 30

Why is the Cb ipsilateral

Answer 30

because of cortical loop through dentate Nucl.

Question 31

Dentate, interposed (SCP) projects via

Answer 31

superior cerebellar peduncle to the saccadic eye movement and planning volitional mmt

Question 32

Fastigial nucleus (ICP) will lead into

Answer 32

the reticular formation, superior colliculus and then it will produce lower motor neurons in medial ventral horn = for axial limb musc. & motor function

Question 33

What are the arteries for the cerebellum?

Answer 33

Basiliar art, pontine art, ant + post inferior cere. art., superior cerebellar art

Question 34

What is the function of the Spinocerebellum?

Answer 34

From somatic sensory inputs from
trunk & limbs – controlling posture & movement

Question 35

What is the function of the Cerebrocerebellum?

Answer 35

From cerebral cortex - planning of
movement

Question 36

What is the function of Vestibulocerebellum?

Answer 36

From vestibular labyrinth –
maintain balance and eye control