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Anatomy 205 > Cerebellum > Flashcards

Cerebellum Flashcards

1
Q

Site

A

Largest part of hindbrain, lying in posterior cranial fossa

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2
Q

Relations: above

A

Tentorium cerebelli separating it from cerebral hemispheres

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3
Q

Relations: in front

A

Back of pons and medulla separated by 4th ventricle

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4
Q

Relations: lateral

A
  1. Sigmoid Dural sinuses
  2. Mastoid antrum
  3. Mastoid air cells
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5
Q

Parts

A
  1. Two large lateral cerebellar hemispheres
  2. Vermis
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6
Q

Cerebellar hemispheres

A

Formed of many gyri called folia separated by deep fissures

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7
Q

Vermis

A

Narrow median part joining the two cerebellar hemispheres.
It is divided into superior and inferior vermis

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8
Q

Shape

A
  1. 2 Notches
  2. 2 Surfaces
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9
Q

Notches

A
  1. Anterior notch
  2. Posterior notch
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10
Q

Anterior notch

A

Wide notch related to brain stem back

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11
Q

Posterior notch

A

Narrow notch receiving Falx cerebelli

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12
Q

Surfaces

A
  1. Superior surface
  2. Inferior surface
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13
Q

Superior surface content

A
  1. Superior vermis
  2. Fissure prima (primary fissure)
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14
Q

Inferior surface content

A
  1. Vallecula
  2. Inferior vermis
  3. Flocculus
  4. Tonsil
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15
Q

Superior vermis

A

Median longitudinal ridge merging with cerebellar hemispheres

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16
Q

Superior vermis is formed of?

A

Formed of 5 lobes
1. Lingula
2. Central lobule
3. Culmen
4. Declive
5. Folium (from before backwards)

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17
Q

Fissura prima

A

Wide V-shaped fissure separating anterior lobe from middle (posterior lobe)

18
Q

Vallecula

A

Deep median longitudinal groove between inferior surfaces of both hemispheres

19
Q

Inferior vermis

A

Longitudinal ridge lying in Vallecula

20
Q

Inferior vermis lobules

A
  1. Nodule
  2. Uvula
  3. Pyramid
  4. Tuber vermis from before backward
21
Q

Flocculus

A
  1. Lies on each side along anterior border of inferior surface hemisphere
  2. Almost isolated from hemisphere by posterolateral fissure
  3. The 2 oculi are connected to nodules forming
    flocculo-nodular lobe
22
Q

Tonsil

A
  1. Small part of hemisphere on either side of inferior vermis uvula
  2. It is partly separated from hemisphere inferior surface by retrotonsillar fissure
23
Q

Fissures

A
  1. Primary
  2. Posterolateral
  3. Horizontal
24
Q

Primary fissure

A

On superior surface separating anterior from posterior lobes

25
Q

Posterolateral fissure

A

Separates flocculondular lobe from rest of hemisphere

26
Q

Horizontal fissure

A

Separates superior and inferior surfaces of cerebellum

27
Q

Subdivisions

A
  1. Anatomical division
  2. Functional division
28
Q

Anatomical division

A

Divided by primary and posterolateral fissures into 3 anatomical lobes:
1. Anterior lobe
2. Posterior lobe
3. Flocculo-nodular lobe

29
Q

Anterior lobe

A

Area on superior surface cranial to primary fissure

30
Q

Posterior lobe

A

Large area between primary and posterolateral fissures lying in superior and inferior surfaces

31
Q

Flocculo-nodular lobe

A

Consists of right and left flocculi and median nodule lying in caudal to posterolateral fissure

32
Q

Functional division

A

3 functional zones:
1. Vestibule-cerebellum (Archi-cerebellum)
2. Spino cerebellum (paleo-cerebellum)
3. Cerebro-cerebellum (neo-cerebellum)

33
Q

Oldest part of cerebellum Phylogenitically

A

Vestibulo-cerebellum

34
Q

Vestibule-cerebellum

A
  1. Formed of flocculo-nodular lobe
  2. Connected with internal ear vestibular system
  3. Concerned with equilibrium
35
Q

Spino-cerebellum

A
  1. Formed of vermal (midline vermis) and paravermal (part of hemisphere adjacent and parallel to vermis) zones
  2. Connected with spinal cord and brain stem
  3. Concerned with regulation of muscle tone and muscle coordination
36
Q

Cerebro-cerebellum

A
  1. Connected with cerebral cortex
  2. It is concerned with planning and control of movements
37
Q

Atrial supply

A
  1. Superior cerebellar artery
  2. Anterior inferior cerebellar artery
  3. Posterior inferior cerebellar artery
38
Q

Superior cerebellar artery

A

From basilar artery supplies superior surface

39
Q

Anterior inferior cerebellar artery

A

From basilar artery supplies small anterior part of inferior surface

40
Q

Posterior inferior cerebellar artery

A

From vertebral artery
Supplies large posterior part of inferior

Anatomy 205 (197 decks)

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