4 - Cerebellum

Question 1

What is the vermis?

Answer 1

Runs along the midline of the cerebellum

Question 2

What divides the anterior and posterior lobes?

Answer 2

primary fissure

Question 3

3 lobes of cerebellum

Answer 3

Anterior
Posterior
Flocculonodular

Question 4

Blood supply to the Cerebellum

Answer 4

PICA
Superior cerebellar artery
Branches of basillar

Question 5

Most common site of infarct

Answer 5

PICA

Question 6

3 layers of cerebellar cortex

Answer 6

Outer - pale, axons, few cells
Middle - purkinje cells
Inner - granule layer

Question 7

Superior cerebellar peduncle

Answer 7

output fibers only(Mainly to VL thalamus)

Question 8

Middle cerebellar peduncle

Answer 8

input fibers from (contralateral) cerebral cortex and cranial nerves via pons

Question 9

Inferior cerebellar peduncle

Answer 9

input fibers from the spinal cord via dorsal and ventral spinocerebellar tracts

Question 10

Dorsal spinocerebellar tract

Answer 10

Ipsilateral

carries information from proprioceptors

Question 11

Ventral spinocerebellar tract

Answer 11

Contralateral

Carries information about state of reflexes

Question 12

Ventral spinothalamic

Answer 12

Contralateral in SC

Recrosses in BS - same side

Question 13

Where are the signs with a lesion in the cerebellum?

Answer 13

Same side

Question 14

Deep cerebellar nuclei

Answer 14

Fastigial n. Globose n. Emboliform n. Dentate

Question 15

Which nuclei connects to the Cerebellar Hemispheres & lateral part of anterior lobe

Answer 15

dentate nuclei

Question 16

Which nuclei connect to the vermis and medial parts of hemispheres

Answer 16

Fastigial and interposed nucleu

Question 17

Which nuclei connect the flocculo-nodular lobe

Answer 17

Lateral vestibular nuclei of pons

Question 18

Role of cerebellum

Answer 18

Accurate and smooth movements

Question 19

Cerebellar damage

Answer 19

clumsiness, abnormal fatigue and instability of movement.
Extraocular eye muscles are particularly affected
neuronal plasticity here so can be recovered

Question 20

Vestibulocerebellum

Answer 20

Flocculonodular lobe

Question 21

Spinocerebellum

Answer 21

vermis, cortex just lateral to vermis

Question 22

Cerebrocerebellum

Answer 22

Lateral parts of cerebellar hemispheres (both anterior and posterior lobes

Question 23

Function of the Vestibulocerebellum

Answer 23

Co-ordinates head and eye movements to ensure the stability of gaze

Question 24

Difference between function of medial and lateral vestibulospinal tract

Answer 24

It controls balance of the head on the body, via the medial vestibulospinal tract
Helps balance of the body on the ground via the lateral vestibulospinal tract

Question 25

Function of the spinocerebellum

Answer 25

Controls locomotion and limb coordination

Question 26

Spinocerebellum inputs

Answer 26

spinocerebellar tracts

Question 27

Cerebrocerebellum function

Answer 27

Co-ordinates movement initiated by motor cortex (speech, voluntary movements of hands and arms, and hand-eye co-ordination)

Question 28

Flocculonodular syndrome

Answer 28

Poor balance and disordered eye movements | unable to stand in romberg test

Question 29

What is titubation

Answer 29

bobbing motion of head or trunk

Question 30

Common cause of flocculonodular syndrome

Answer 30

Medulloblastoma in 4th ventricle

Question 31

Spinocerebellar syndrome

Answer 31

Incoordination of the limbs Ataxia, hypotonia, dysdiadochokinesis seen in alcoholics

Question 32

Cerebellar stroke

Answer 32

``` Global signs headache vomiting nystagmus, ptosis ataxia ```

Question 33

Cerebellar damage symptoms

Answer 33

``` 'like being drunk' Ataxia Vertigo Nystagmis Dysdiadochokinesia Hypotonia Intention tremor Dysarthria Dysphagia ```