Cerebellum

Question 1

Site

Answer 1

Largest part of hindbrain, lying in posterior cranial fossa

Question 2

Relations: above

Answer 2

Tentorium cerebelli separating it from cerebral hemispheres

Question 3

Relations: in front

Answer 3

Back of pons and medulla separated by 4th ventricle

Question 4

Relations: lateral

Answer 4

1. Sigmoid Dural sinuses
2. Mastoid antrum
3. Mastoid air cells

Question 5

Parts

Answer 5

1. Two large lateral cerebellar hemispheres
2. Vermis

Question 6

Cerebellar hemispheres

Answer 6

Formed of many gyri called folia separated by deep fissures

Question 7

Vermis

Answer 7

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

Question 8

Shape

Answer 8

1. 2 Notches
2. 2 Surfaces

Question 9

Notches

Answer 9

1. Anterior notch
2. Posterior notch

Question 10

Anterior notch

Answer 10

Wide notch related to brain stem back

Question 11

Posterior notch

Answer 11

Narrow notch receiving Falx cerebelli

Question 12

Surfaces

Answer 12

1. Superior surface
2. Inferior surface

Question 13

Superior surface content

Answer 13

1. Superior vermis
2. Fissure prima (primary fissure)

Question 14

Inferior surface content

Answer 14

1. Vallecula
2. Inferior vermis
3. Flocculus
4. Tonsil

Question 15

Superior vermis

Answer 15

Median longitudinal ridge merging with cerebellar hemispheres

Question 16

Superior vermis is formed of?

Answer 16

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

Question 17

Fissura prima

Answer 17

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

Question 18

Vallecula

Answer 18

Deep median longitudinal groove between inferior surfaces of both hemispheres

Question 19

Inferior vermis

Answer 19

Longitudinal ridge lying in Vallecula

Question 20

Inferior vermis lobules

Answer 20

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

Question 21

Flocculus

Answer 21

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

Question 22

Tonsil

Answer 22

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

Question 23

Fissures

Answer 23

1. Primary
2. Posterolateral
3. Horizontal

Question 24

Primary fissure

Answer 24

On superior surface separating anterior from posterior lobes

Question 25

Posterolateral fissure

Answer 25

Separates flocculondular lobe from rest of hemisphere

Question 26

Horizontal fissure

Answer 26

Separates superior and inferior surfaces of cerebellum

Question 27

Subdivisions

Answer 27

1. Anatomical division 2. Functional division

Question 28

Anatomical division

Answer 28

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

Question 29

Anterior lobe

Answer 29

Area on superior surface cranial to primary fissure

Question 30

Posterior lobe

Answer 30

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

Question 31

Flocculo-nodular lobe

Answer 31

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

Question 32

Functional division

Answer 32

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

Question 33

Oldest part of cerebellum Phylogenitically

Answer 33

Vestibulo-cerebellum

Question 34

Vestibule-cerebellum

Answer 34

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

Question 35

Spino-cerebellum

Answer 35

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

Question 36

Cerebro-cerebellum

Answer 36

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

Question 37

Atrial supply

Answer 37

1. Superior cerebellar artery 2. Anterior inferior cerebellar artery 3. Posterior inferior cerebellar artery

Question 38

Superior cerebellar artery

Answer 38

From basilar artery supplies superior surface

Question 39

Anterior inferior cerebellar artery

Answer 39

From basilar artery supplies small anterior part of inferior surface

Question 40

Posterior inferior cerebellar artery

Answer 40

From vertebral artery Supplies large posterior part of inferior