L30 Flashcards
where does the cerebellum receive input from
spinal cord, brainstem and cortex
what are the three lobes of the cerebellum
anterior, posterior, flocculonodular
what are the three zones of the cerebellum
vermis, intermediate hemisphere, and lateral hemisphere
deep nuclei of the cerebellum
fastigial
interposed
dentate
vestibular
what are the three functional areas of the cerebellum and the associated nuclei
vestibulocerebellum = vestibular nuclei
spinocerebellum = fastigial and interposed nuclei
cerebrocerebellum = dentate nuclei
what is the function of the vestibulocerebellum
Vestibular ocular reflex, balance, posture
subdivisions of the vestibulocerebellum
flocculus and nodulus
where is the vestibulocerebellum getting input from
vestibular input from vestibular nuclei and CN8
where is the vestibulocerebellum outputting onto
back onto vestibular nuclei in brainstem
deficits of vestibulocerebellum
balance, posture and eye movements
function of spinocerebellum
sensory integration and coordination of descending output for multi joint movements and dynamic stability
subdivisions of the spinocerebellum
intermediate and vermis
what is the input for the spinocerebellum
somatosensory info from periphery, visual and vestibular information and motor copy specific to body region
output of information from spinocerebellum
lateral vestibular nuclei and reticular formation (vermis), M1 areas via thalamus, other nuclei within brainstem (activation of CPGs via intermediate)
function of cerebrocerebellum
visually guided and goal directed movements, supra spinal control circuits, planning of movements
input for cerebrocerebellum
M1, premotor cortex, frontal and posterior parietal lobes
output of cerebrocerebellum
thalamus
nuclei of cerebrocerebellum
dentate nucleus
each incoming input to the cerebellum synapses on what
deep neuclei
from the deep nuclei where does the incoming input project
to the cerebellar cortex
once the input has reached the cerebellar cortex where does it project
back onto the relevant deep nuclei
what happens when you are born without a cerebellum
some are unable to adapt however many have semi-normal lives as the cerebellum is redundant and there are other systems that have the same functions
what are common signs of cerebellar deficits
wide base of support
ataxic gait
impaired multijoint coordination
alternating movements
overshoot or undershoot movements
rebound phenomenon
overshooting reactions to perturbations
what are some similarities between the cerebellum and the basal ganglia
- rely heavily on cortical input
- have relay nuclei
- send output to the thalamus
main difference of the cerebellum and basal ganglia
BG = preparatory phase = involved in the planning and gain of complex movements
Cerebellum = concern with the coordination/timing and execution of on going movements
