2.29 Cerebellum Flashcards
3 functional areas of cerebellum
- vestibulocerebellum
- spinocerebellum
- cerebrocerebellum (via dentate nucleus)
vestibulocerebellum has to do with
balance
- equipibrium
- eye movements
- postural muscles
spinocerebellum has to do with
gross movement
cerebrocerebellum has to do with
finer movement
systems that feed into vestibulocerebellum
- visual
- vestibular
outcoems of vestibulocerebellum activation
- eye movements
- postural muscle movement
The vestibulocerebellum is part of this lobe
flocculonodular lobe
spinocerebellum affects these systems
affects both lateral and medial UMN systems
3 main inputs to spinocerebellum
- spinocerebellar internal feedback tracts (spinal cord)
- somatosensory
- sensorimotor
spinocerebellum outputs
- brainstem
- thalamus
spinocerebellum acting on thalamus has effects on
medial and lateral UMN
spinocerebellum is part of the
vermis
cerebrocerebellum and fine movement
- coordination
- planing
- timing
cerebrocerebellum inputs
somatosensory motor cortices » cerebrocerebellum via dentate nucleus
specific receptors for cerebrocerebellum
- GTO
- muscle spindles
- cutaneous mechanoreceptors
cerebrocerebellum outputs
- motor thalamus
- cerebral cortex
cerebrocerebellum outcome
make corrections to movements
cerebrocerebellum is part of the
lateral hemispheres
primary job of cerebellar peduncles
connect cerebellum to everything else
How many cerebellar peduncles?
3
cerebellar peduncles: ratio of afferents to efferents
40:1
What are the 3 cerebellar peduncles?
- inferior
- middle
- superior
inferior cerebellar peduncle receives afferents from
contralateral inferior olivary nucleus (ION)
What does the ION connect?
ION connects spinal cord and brainstem to the cerebellum
