L41 Cerebellum

Question 1

Cerebellum functions (5)

Answer 1

Equilibrium
Muscle tone, posture
Motor coordination
Plans motor actions
Adjusts output for motor actions

Question 2

Cerebellum gray matter, white matter

Answer 2

Gray: surface/cortex
White: inside

Question 3

Motor sequence learning

Answer 3

basal ganglia

Question 4

Primary fissure divides cerebellum into

Answer 4

anterior and posterior lobes

Question 5

Posterolateral fissure separates

Answer 5

flocculonodular lobe from body of cerebellum

Question 6

Cerebellar deep Nuclei

Answer 6

Fastigal
Globose
Emboliform
Dentate

Question 7

Interposed nucleus is composed of

Answer 7

globose nucleus

emboliform nucleus

Question 8

Inferior cerebellar peduncle bodies

Answer 8

Restiform body

Juxtarestiform body

Question 9

Restiform body
Inputs
functions

Answer 9

inputs from spinal cord and brainstem

Monitors muscle and limb movement

Question 10

Juxtarestiform body

function

Answer 10

interconnects vestibular nuclei and cerebellum

Question 11

Middle cerebellar peduncle contains _____ from (ipsi/contra) ______

Answer 11

afferents from contralateral basis pontis

Question 12

Middle cerebellar peduncle ______ signals from ______

Answer 12

motor signals from cerebral cortex

Question 13

Superior cerebellar peduncle contains _____ fibers to ____ and ______

Answer 13

efferent fibers to red nucleus and thalamus

Question 14

How is the body represented in the cortex?

Answer 14

Fractioned Somatotopy: fractured nature of body parts

Question 15

Molecular layers contains

Answer 15

purkinje cell dendrites

granule cell axons

Question 16

Only axons to leave the cortex

Answer 16

purkinje cell

Question 17

Cerebellar cortex strucutre

Answer 17

Molecular layer
Purkinje cell layer
Granule layer

Question 18

Cortical afferents neurotransmitter

Cortical efferents neurotransmitter

Answer 18

Afferent excitatory: glutaminergic

Efferent Inhibitory: GABAnergic

Question 19

Microzone

Answer 19

group of purkinje cells with same somatotropic receptive field

Question 20

Deep nuclei neuronal populations

Answer 20

Mossy fibers into cortex

Projection neurons whose axons leave cerebellum

Question 21

Vermis projection

Answer 21

Fastigal

Question 22

Medial hemishere projection

Answer 22

interposed

Question 23

Lateral hemisphere projection

Answer 23

dentate

Question 24

Anterior Spinocerebellar tract goes to

Answer 24

Superior peduncle

Question 25

Posterior Spinocerebellar tract goes to

Answer 25

Inferior peduncle

Question 26

Cuneocerebellar Spinocerebellar tract goes to

Answer 26

Inferior peduncle

Question 27

``` PSCT Origin Body part input midline peduncle ```

Answer 27

``` Clarkes nucleus Leg, Trunk Mechanoreceptors, proprioception No crossing Inferior ```

Question 28

``` ASCT Origin Body part input midline peduncle ```

Answer 28

``` Spine Leg, Trunk Mechanoreceptors, movement interneurons Crosses twice Superior ```

Question 29

``` CCT Origin Body part input midline peduncle ```

Answer 29

``` Cuneate nucleus of medulla Arm, Trunk Mechanoreceptors, proprioception No crossing Inferior ```

Question 30

Sensorimotor cortex projects via _____ onto (ispi/contra) _______

Answer 30

Sensorimotor cortex projects via corticospinal collaterals onto ipsilateral olivary nuclei

Question 31

Olivocerebellar fibers project to ______ thru _______

Answer 31

Olivoverebellar fibers project to contralateral cerebellar cortex thru ICP

Question 32

Inferior olivary nucleus gets info from (3)

Answer 32

spino-olivary tract red nucleus cerebral cortex

Question 33

At rest, olivary neurons....

Answer 33

synchronously discharge, cause complex spikes in perkinje cells

Question 34

Complex spike

Answer 34

multiple action potentials in one nueon in response to single action potential from another neuron

Question 35

Inferior olivary nucleus and motor relationship

Answer 35

ION involved in motor learning and acquisition of new motor skills

Question 36

Red nucleus input

Answer 36

Cerebral cortical fibers descending to olive | Cerebellar output fibers ascending to thalamus

Question 37

Red nucleus largest output Excite/inhibit Laterality

Answer 37

Inhibitory ipsilateral olivary nucleus

Question 38

Vestibulocerebellum input

Answer 38

Vestibular labyrinth | Vestibular nuclei

Question 39

Vestibulocerebellum location

Answer 39

flocculonodular lobe | Vermis

Question 40

Vestibulocerebellum output

Answer 40

Fastigal nucleus | Vestibular nuclei

Question 41

Vestibulocerebellum function

Answer 41

Eye movement in response to head mvmnt. | Balance

Question 42

Vestibulocerebellum output to medial and lateral vestibular nuclei control ____ thru _____

Answer 42

eyes thru Medial Longitudinal fasciculus

Question 43

Vestibulocerebellum output to ipsilateral lateral vestibular nucleus controls

Answer 43

balancing function

Question 44

Spinocerebellum input

Answer 44

``` spinal cord (spinocerebellar tract) brainstem (trigeminal afferents) ```

Question 45

Spinocerebellum location

Answer 45

Paravermal area | Part of Vermis

Question 46

Spinocerebellum output

Answer 46

Interposed nucleus - red nucleus (magnocellular) - VA/VL of thalamus

Question 47

Spinocerebellum function

Answer 47

posture and gait | coordination of trunk ad limb movements

Question 48

Pontocerebellum input

Answer 48

Motor cortex Basilar pons MCP

Question 49

Pontocerebellum location

Answer 49

Lateral cerebellar hemisphere

Question 50

Pontocerebellum Output

Answer 50

Dentate nucleus - red nucleus (parvocellular) - VA/VL of thalamus

Question 51

Pontocerebellum function

Answer 51

planning timing of movements (esp. upper) | Coordination of speech