cerebellum

Question 1

cerebellum info path

Answer 1

upper motor neuron in primary motor cortex synapses on lower motor neuron to implement motor command –> copy of motor command sent to cerebellum –> proprioceptive info sent to cerebellum –> compares command to motion and sends feedback to motor cortex

Question 2

flocculonodular lobe

Answer 2

balance and eye movements
input from vestibular nuclei
output to fastigial nuclei and vestibular nuclei and then to lower motor neurons

Question 3

anterior lobe

Answer 3

movement coordination, motor execution
input: proprioception
output to interposed nuclei then to descending motor pathways

Question 4

posterior lobe

Answer 4

motor planning
input from cortex
output to dentate nucleus, then to thalamus and cortex

Question 5

3 deep nuclei

Answer 5

fastigial: output of vestibulocerebllum
interposed: output of spinocerebellum
dentate: output of cerebrocerebellum

Question 6

3 peduncles

Answer 6

superior: output to cortex
middle: input from cortex via pons
inferior: input about body position

Question 7

molecular layer

Answer 7

axons, interneurons

Question 8

purkinje layer

Answer 8

single row of cells
project to deep nuclei

Question 9

granular layer

Answer 9

densely packed granule cells
form parallel fibers

Question 10

Marr-Abus-Ito motor learning theory

Answer 10

granule cells give continuous info about what the body is doing
when body makes a movement error → climbing fiber fires → kicking off parallel fiber synapses (input will be less significant)

Question 11

cerebellum feedback loop

Answer 11

mossy fiber = plan
climbing fiber = error
receives plan and actual movement
outputs feedback to cortex

Question 12

cerebellar inputs

Answer 12

climbing fibers (error) and mossy fibers (plan)