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SP16 Anatomy Exam 3 > L41 Cerebellum > Flashcards

L41 Cerebellum Flashcards

1
Q

Cerebellum functions (5)

A 
Equilibrium
Muscle tone, posture
Motor coordination
Plans motor actions
Adjusts output for motor actions
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2
Q

Cerebellum gray matter, white matter

A

Gray: surface/cortex
White: inside

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3
Q

Motor sequence learning

A

basal ganglia

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4
Q

Primary fissure divides cerebellum into

A

anterior and posterior lobes

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5
Q

Posterolateral fissure separates

A

flocculonodular lobe from body of cerebellum

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6
Q

Cerebellar deep Nuclei

A

Fastigal
Globose
Emboliform
Dentate

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7
Q

Interposed nucleus is composed of

A

globose nucleus

emboliform nucleus

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8
Q

Inferior cerebellar peduncle bodies

A

Restiform body

Juxtarestiform body

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9
Q

Restiform body
Inputs
functions

A

inputs from spinal cord and brainstem

Monitors muscle and limb movement

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10
Q

Juxtarestiform body

function

A

interconnects vestibular nuclei and cerebellum

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11
Q

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

A

afferents from contralateral basis pontis

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12
Q

Middle cerebellar peduncle ______ signals from ______

A

motor signals from cerebral cortex

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13
Q

Superior cerebellar peduncle contains _____ fibers to ____ and ______

A

efferent fibers to red nucleus and thalamus

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14
Q

How is the body represented in the cortex?

A

Fractioned Somatotopy: fractured nature of body parts

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15
Q

Molecular layers contains

A

purkinje cell dendrites

granule cell axons

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16
Q

Only axons to leave the cortex

A

purkinje cell

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17
Q

Cerebellar cortex strucutre

A

Molecular layer
Purkinje cell layer
Granule layer

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18
Q

Cortical afferents neurotransmitter

Cortical efferents neurotransmitter

A

Afferent excitatory: glutaminergic

Efferent Inhibitory: GABAnergic

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19
Q

Microzone

A

group of purkinje cells with same somatotropic receptive field

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20
Q

Deep nuclei neuronal populations

A

Mossy fibers into cortex

Projection neurons whose axons leave cerebellum

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21
Q

Vermis projection

A

Fastigal

22
Q

Medial hemishere projection

A

interposed

23
Q

Lateral hemisphere projection

A

dentate

24
Q

Anterior Spinocerebellar tract goes to

A

Superior peduncle

25
Q

Posterior Spinocerebellar tract goes to

A

Inferior peduncle

26
Q

Cuneocerebellar Spinocerebellar tract goes to

A

Inferior peduncle

27
Q 
PSCT
Origin
Body part
input
midline
peduncle
A 
Clarkes nucleus
Leg, Trunk
Mechanoreceptors, proprioception
No crossing
Inferior
28
Q 
ASCT
Origin
Body part
input
midline
peduncle
A 
Spine
Leg, Trunk
Mechanoreceptors, movement interneurons
Crosses twice
Superior
29
Q 
CCT
Origin
Body part
input
midline
peduncle
A 
Cuneate nucleus of medulla
Arm, Trunk
Mechanoreceptors, proprioception
No crossing
Inferior
30
Q

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

A

Sensorimotor cortex projects via corticospinal collaterals onto ipsilateral olivary nuclei

31
Q

Olivocerebellar fibers project to ______ thru _______

A

Olivoverebellar fibers project to contralateral cerebellar cortex thru ICP

32
Q

Inferior olivary nucleus gets info from (3)

A

spino-olivary tract
red nucleus
cerebral cortex

33
Q

At rest, olivary neurons….

A

synchronously discharge, cause complex spikes in perkinje cells

34
Q

Complex spike

A

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

35
Q

Inferior olivary nucleus and motor relationship

A

ION involved in motor learning and acquisition of new motor skills

36
Q

Red nucleus input

A

Cerebral cortical fibers descending to olive

Cerebellar output fibers ascending to thalamus

37
Q

Red nucleus largest output
Excite/inhibit
Laterality

A

Inhibitory ipsilateral olivary nucleus

38
Q

Vestibulocerebellum input

A

Vestibular labyrinth

Vestibular nuclei

39
Q

Vestibulocerebellum location

A

flocculonodular lobe

Vermis

40
Q

Vestibulocerebellum output

A

Fastigal nucleus

Vestibular nuclei

41
Q

Vestibulocerebellum function

A

Eye movement in response to head mvmnt.

Balance

42
Q

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

A

eyes thru Medial Longitudinal fasciculus

43
Q

Vestibulocerebellum output to ipsilateral lateral vestibular nucleus controls

A

balancing function

44
Q

Spinocerebellum input

A 
spinal cord (spinocerebellar tract)
brainstem (trigeminal afferents)
45
Q

Spinocerebellum location

A

Paravermal area

Part of Vermis

46
Q

Spinocerebellum output

A

Interposed nucleus

  • red nucleus (magnocellular)
  • VA/VL of thalamus
47
Q

Spinocerebellum function

A

posture and gait

coordination of trunk ad limb movements

48
Q

Pontocerebellum input

A

Motor cortex
Basilar pons
MCP

49
Q

Pontocerebellum location

A

Lateral cerebellar hemisphere

50
Q

Pontocerebellum Output

A

Dentate nucleus

  • red nucleus (parvocellular)
  • VA/VL of thalamus
51
Q

Pontocerebellum function

A

planning timing of movements (esp. upper)

Coordination of speech

SP16 Anatomy Exam 3 (16 decks)

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