Cerebellum

Question 1

Cerebellar nuclei

Answer 1

1. nucleus dentatus
2. nucleus emboliformis
3. nucleus globosus
4. nucleus fastigii

Question 2

Nucleus dentatus

Answer 2

projects to nucleus ruber and ventrolateral (VL) thalamic nuclei (cerebellothalamic tract)

coordination of limb movements

Question 3

Nucleus emboliformis

Answer 3

emboliformis + globosus = nucleus interpositus

Question 4

Nucleus globosus

Answer 4

globosus + emboliformis = nucleus interpositus

Question 5

Nucleus interpositus

Answer 5

projects to nucleus ruber (cerebellorubral tract)

coordination of trunk movements

Question 6

flocculonodular lobe

Answer 6

VESTIBULOCEREBELLUM

balance and eye movements

input from vestibular nuclei

Purkinje fibers to nucleus fastigii

Question 7

anterior lobe

Answer 7

SPINOCEREBELLUM

muscle tone and movements of axial and limb muscles

input from tractus spinocerebellaris anterior et posterior

Purkinje fibers to nucleus fastigii

Question 8

posterior lobe

Answer 8

CEREBROCEREBELLUM (pontocerebellum)

planning movements and precise movements of upper limb

input from tractus corticopontocerebellaris

Purkinje fibers to nucleus interpositus and nucleus dentatus

Question 9

mossy fibers

Answer 9

originate from pontine nuclei, spinal cord (tractus spinocerebellaris), reticular formation and vestibular nuclei

excitatory projections with cerebellar nuclei and GRANULAR CELLS

Question 10

climbing fibers

Answer 10

originate from inferior olive of medulla

excitatory projections with cerebellar nuclei and PURKINJE CELLS

Question 11

afferent fibers of cerebellar cortex

Answer 11

tractus olivocerebellaris (climbing fibers)

tractus spinocerebellaris anterior et posterior (mossy fibers)

tractus pontocerebellaris

nuclei vestibulare

formatio reticularis

Question 12

efferent fibers of nucleus interpositus et nucleus dentatus

Answer 12

via penduculi cerebellares superiores

tractus cerebellothalamicus (to VL thalamic nuclei and then to cerebral cortex)

tractus cerebrorubralis (to nucleus ruber)

Question 13

efferent fibers of nucleus fastigii

Answer 13

via pedunculi cerebellares inferiores

nuclei vestibulares, tractus cerebellovestibularis

formatio reticularis (pontine & medullary), tractus cerebelloreticularis

Question 14

nucleus fastigii

Answer 14

projects to nuclei vestibulares and reticular formation

balance

Question 15

pedunculi cerebellares inferiores

Answer 15

input:

tractus spinocerebellaris posterior: unconscious proprioceptive information from lower trunk & limb

tractus cuneocerebellaris: unconscious proprioceptive information from upper limb and neck (from nucleus cuneatus accessorius in medulla oblongata)

tractus trigeminocerebellaris: unconscious proprioceptive information from face (from nucleus spinalis nervi trigemini)

tractus olivocerebellaris
tractus vestibulocerebellaris
tractus reticulocerebellaris

output:

tractus cerebellovestibularis (nucleus fastigii)
tractus cerebelloreticularis (nucleus fastigii)

Question 16

Pedunculi cerebellares medii

Answer 16

input:

tractus pontocerebellaris

Question 17

Pedunculi cerebellares inferiores

Answer 17

input:

tractus spinocerebellaris anterior

output:

tractus cerebellorubralis (nucleus dentatus & interpositus): part of pathway for voluntary and unvoluntary control of movements

tractus cerebellothalamicus (nucleus dentatus)
tractus cerebelloreticularis (nucleus fastigii)