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General Cerebellum Knowledges Flashcards

1
Q

What does “cerebellum” mean?

A

Little Brain

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2
Q

In a nutshell, what is its role ?

A

Plays a role in posture, balance, maintenance of muscle tone and coordinated skilled voluntary motor activities.

PROCESSES INFORMATION ABOUT CURRENT MOVEMENT AND POSITION

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3
Q

What is the tentorium cerebelli ?

A

The structure that separates cerebellum from occipital and temporal lobes.

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4
Q

Site three regions to which is linked the cerebellum

A

Medulla, pons and the fourth ventricle

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5
Q

In a nutshell, how is built the Cb ?

A

The Vermis and two hemispheres.

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6
Q

Site the three Cb lobes

A

Anterior, posterior and flocculonodular lobes.

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7
Q

What is the other name of the anterior lobe and what is its function ?

A

Spinocerebellum
Regulation of muscle tone and adjusting movements.

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8
Q

What separates the Anterior lobe from other structures ?

A

The primary fissure.

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9
Q

What is the other name of the posterior lobe and what is its function ?

A

Cerebocerebellum
Assisting in planning and programming of skilled or fine motor movements

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10
Q

What separates the Anterior lobe from other structures ?

A

Horizontal fissure

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11
Q

What is the other name of the flocculonodular lobe and what role it plays ?

A

Vestibulocerebellum
Maintenance of posture and balance.

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12
Q

What is the flocculonodular lobe made from (two structures) ?

A

One nodule (center part) and two floculli (on each sides).

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13
Q

What is the delimiration of the flocculonodular lobe ?

A

Posterolateral fissure

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14
Q

Site the three fissure of the Cb

A

Horizontal fissure
Posterolateral fissure
Primary fissure

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15
Q

What are the cebellar peduncles ?

A

Contains efferent and afferent axons between Cb and CNS.

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16
Q

Cite the three peduncles of the cerebellum

A

Superior
Middle
Inferior

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17
Q

What does the SUPERIORcerebellar peduncle connect ?

A

Connects cerebellum and MIDBRAIN

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18
Q

What does the MIDDLE cerebellar peduncle connect ?

A

Connects Cb with pons

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19
Q

What does the INFERIOR cerebellar peduncle connect ?

A

Connects Cb and Medulla

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20
Q

What are the major fibre of the SUPERIOR cerebellar peduncle ? (afferent/efferent)

A

Majority of EFFERENT signals

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21
Q

What are the major fibre of the MIDDLEcerebellar peduncle ? (afferent/efferent)

A

Majority of AFFERENT signals

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22
Q

What are the major fibre of the INFERIOR cerebellar peduncle ? (afferent/efferent)

A

Majority of AFFERENT signals

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23
Q

What are called the folds of the cerebellar cortex ?

24
Q

Describes the folia of the Cbar cortex

A

Ridges thinner, smalled and they’re organized in parallel layers

25
Describe how is organized the grey and the white matter in the Cbar cortex.
External grau matter layer, subcortical white matter.
26
How is called the white matter in the Cb ?
The Arbor vitae
27
SIte the four cerebellar nuclei from lateral to medial.
Dentate Emboliform Globose Fastigial
28
What is the Interposed nucleus ?
A merged version of the emboliform and of the fastigial nuclei.
29
Where does the Lateral zone of the Cbar cortex project to ?
to the dentate nucleus
30
What is the role of the lateral zone of the Cbar cortex ?
Planning and programming mvt
31
Where does the INTERMEDIATE ZONE (paravermal) of the Cbar cortex project to ?
Globose and emboliform nucleus (interposed nuclei)
32
What is the role of the INTERMEDIATE ZONE of the Cbar cortex ?
Modulating motor execution of lateral descending motor pathways
33
Where does the MEDIAN VERMAL ZONE (paravermal) of the Cbar cortex project to ?
To fastigial nucleus
34
What is the role of the MEDIAN VERMAL ZONE ?
Modulating motor execution of medial descending motor pathways
35
Site three main sources of Cb afferences
Spinal cord and brainstem Cerebral cortex Vestibular sys
36
Site three main pathways for Cb afference from the SC.
VENTRAL/ANTERIOR spinocerebellar pathway DORSAL/POSTERIOR spinocerebellar pathway Cuneocerebellar pathway
37
What kind of signal carries the Ventral/anterior spinocerebellar pathways to the Cb ?
Proprioceptive information from muscle spindles, golgi tendon organs and joint receptor of LOWER extremities
38
What kind of signal carries the Dorsal/posterior spinocerebellar pathways to the Cb ?
Proprioceptive information from muscle spindles, golgi tendon organs and joint receptor of TRUCK and LOWER extremities
39
What kind of signal carries the cuneocerebellar pathways to the Cb ?
Proprioceptive information from muscle spindles, golgi tendon organs and joint receptor within UPPER LIMBS and THORAX
40
Cite afferent pathways from the Cbar cortex
Cortico PONTO Cbar Cerebro OLVIVO Cbar cerebro RETICULO Cbar
41
Cite main functions of pathways from the Cbar cortex
Further regulate and modify voluntary movement (initiation, planning, timing of motor activities)
42
Where does the cortico PONTO Cbar pathway takes it source ?
Cortex of frontal, temporal, parietal, et occipital lobes
43
Where does the cortico OLIVO Cbar pathway takes it source ?
Frontal, temporal, parietal and occiital lobes
44
Where does the cortico RETICULO Cbar pathway takes it source ?
Sensorimotor cortical regions in parietal lobe
45
What is the role of the vestibulocerebellar pathway ?
Maintenance of balance, posture, body position and coordination of eye mvt.
46
Cite 6 main destinations of efferent fibers
Vestibular nuclei thalamus red nucleus reticular formation cerebral cortex spinal cord
47
Where does the efferent vestibular pathway takes its source ?
Fastigial N
48
What is the function of the fastigial vestibular pathway ?
Regulating extensor muscle tone vestibulospinal tract: signals to motor neurons of the SC and maintain posture
49
Where does the thalamic pathway (efferent) takes it source in terms of Cb nuclei ?
Dentate nucleus
50
what is the fct of the dentatothalamic pathway ?
modifies ipsilateral motor activity information relayed to corticospinal tract (influences and modulates motor activity of descending motor pathways).
51
Where does the rubral pathway (efferent) takes it source in terms of Cb nuclei ?
Globose and emboliform nuclei
52
What is the fct of the rubral pathway?
Modifies ipsilateral motor activity Influences RUBROSPINAL tract which acts of PROXIMAL FLEXOR MUSCULATURE of UPPER LIMB.
53
Where does the reticular pathway (efferent) takes it source in terms of Cb nuclei ?
Fastigial nucleus
54
What is the role of fastigial reticular pathway ?
Modulatory inf to medial and lateral reticulospinal tract.
55

Cerebellum (1 decks)

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