Cerebellum

Question 1

Posterior spinocerebellar tract

Answer 1

Afferent
Proprioception from upper limbs + trunk
Ipsilateral
Posterior root ganglion - Clarke's column - Inferior cerebellar peduncle - Vermis PALEOCEREBELLUM (collateral to nuclei)
* mossy fibers

Question 2

Anterior spinocerebellar tract

Answer 2

Afferent
crosses 2x -> ipsilateral
Proprioception of lower limbs
Posterior root ganglion -Intermediate zone + ventral horn- Cross - Lateral funiculus -Superior cerebellar peduncle - cross - Vermis PALEOCEREBELLUM (collaterals to nuclei)
* Mossy fibers

Question 3

Cuneocerebellar tract

Answer 3

Afferent
Proprioception of upper limb + upper thorax
ipsilateral
External cuneate nucleus - Inferior cerebellar peduncle - Vermis
* mossy fibers

Question 4

Cortico-Pontocerebellar tract

Answer 4

Afferent
Contralateral
Conveys control from cerebral cortex

Frontal, temporal, parietal, occipital lobe - corona radiata - internal capsule - Pontine nucleus - Cross - Middle cerebellar peduncle - Hemisphere NEOCEREBELLUM
* mossy fibers

Question 5

Cerebro -Olivocerebellar tract

Answer 5

Afferent
contralateral
Conveys control from cerebral cortex

Frontal, temoral, parietal, occipital lobe - corona radiata - internal capsule - Inferior olive - Cross - Inferior cerebellar peduncle - Vermis and hemispheres
* climbing fibers

Question 6

Vestibulocerebellar tract

Answer 6

Afferent
Conveys information about head position and movement
Ipsilateral
Utricle, saccule, semicircular canals - Medial and inferior vestibular nuclei - Inferior cerebellar peduncle - Nodulus and Flocculus ARCHICEREBELLUM
some fibers straight to cerebellum from vestibular ganglia, no synapse in nuclei
* mossy fibers

Question 7

Cerebro-Reticulocerebellar tract

Answer 7

Afferent
Conveys control from cerebral cortex, important for control of voluntary movement

Nerve cells from many areas of cortex (mainly sensorimotor) - Crossed or uncrossed - Reticular formation - Inferior cerebellar peduncle - Vermis and hemispheres
* mossy fibers

Question 8

Cerebello-dentato- thalamic tract

Answer 8

Efferent
Influences ipsilateral motor activity
crosses
Cerebellar hemispheres - dentate nucleus - superior cerebellar peduncle - cross - Thalamus,VA and VL - Primary motor area of cortex -> corticospinal tract

Question 9

Cerebello-rubri tract

Answer 9

Efferent
influences ipsilateral motor activity
crosses
Intermediate zone between vermis and hemispheres - emboliform/globose nucleus - superior cerebellar peduncle - cross - Red nucleus - rubrospinal tract - ipsilateral motor neurons in spinal cord

Question 10

Cerebello-reticular tract

Answer 10

Efferent
Influences spinal segmental motor activity
Ipsilateral
Vermis - Fastigial nucleus - inferior cerebellar peduncle - Reticular formation -> reticulospinal tract

Question 11

Function of different cerebellar parts

Answer 11

Vermis: movement of long axis of the body; neck, shoulders, thorax, abdomen, hips
Intermediate zone: control muscles of distal parts of limbs; hands + feet
Hemispheres: planning of movements of whole body + conscious assessment of movement errors

Question 12

Cerebello- vestibular tract

Answer 12

Efferent
Influences ipsilateral extensor muscle tone
Ipsi/contalateral
Archicerebellum - Fastigial nucleus - Inferior cerebellar peduncle - ipsi/contralateral lateral vestibular nucleus -> vestibulospinal tract