Cerebellum Flashcards
(47 cards)
What is in charge of initiation and amplitude of movment? NT?
basil gnaglia, Dopamine
What is in charge of making sure a movment “looks pretty”?
cerebellum
List the major functions of the cerebellum
coordination of motor intention with output
anticipatory balence- bod response to anticipation of balence
reacive balence
midline orientation- if I close my eyes I know if I’m leaning to one side
maintains EXSTENSOR TONE muscle against gravity (so we dont get floppy)
motor learning- create a movement based on what has worked in the past
Where is the cerebellum located? fossa, what its dorsal to, and what its seperated by
posterior cranial fossa
dorsal to 4th ventricle, pons, medulla,
seperated by tentorium cerebelli (aka “infratentorial”)
What are the anterior and posterior lobe of the cerebellum seperated by
primary fissure
What does the superior cerebellar peduncle connect? what type of neurons run in it?
connect midbrain and cerebellum
primarily efferent (info coming out of cerebellum), few afferent
(i come out of my house at the superior end of the day)
what is the version og gyri in the cerebellum and whats the diffrence
folia
what does the posterolateral fissure seperate
flocculondular lobe from posterior lobe
explain what would happen to the tonsils of the cerebellum if the brain herinated
theyd be the first one out
what is the one point of connection between the CNS and brainstem
peduncles
What does the middle cerebellar peduncle connect? what type of neurons run in it?
pons to cerebrellum
afferent (info ciming INTO cerebellum)
What does the inferior cerebellar peduncle connect? what type of neurons run in it?
medulla to cerebellum
afferent and efferent
what is the biggest nerve highway in the body
middle cerbellar peduncle
What type of effects on motor function does the cerebellum provide
modulatory (inhbiitory- fine tune things by inhibiting)
what neuron is exclusivley in the cerebellum
perkinje cells
Where does the cerebrocerebellum provide input to? What function is it involved with? Where genrelly is it in cerebellum?
provides input to/ from cortex
involved with planning and initiation of mvmt
cerebellar hemispheres (green)
Where does the spinocerebellum provide input to? What function is it involved with? Where genrelly is it in cerebellum?
input to/ from spinal cord
in vermis and intermediate zones
vermis: posture proximal limb mvmt, eye mvmt (midline stuff since its in midline) (blue)
Intermediate zone: appendicular limb position and somatosensory input (blue)
Where does the vestibulocerebellum provide input to? What function is it involved with? Where generally is it in cerebellum?
input to/from vestibular labyrinth (inner ear)
Maintenance of equilibrium balance and posture, vestibuloocular control
floculondular lobe(purple)
explain the somatotopic organization of the cerebellum
What are the different groupings of fibers involved in cerebellar orgin of input?
pontocerebellar, olivocerebellar, spinocerebellar/ vestibulocerebellur
What are the four spinocerebellar tracts and what type of proprioceptive guidance do they provide?
Cuneo, dorsal spino, ventral, rostral
Overall they provide subconscious proprioceptive information to cerebellum about the movement
What types of cerebellar
functions are involved with the orgin of input: pontocerebellar fibers?
pontocerebellar fibers- planning and control of precise mvmt
What are the largest cortical contributors of the pontocerebellar fibers
PriMC, PriSC, visual cortex
What types of cerebellar
functions are involved with the orgin of input: olivocerebelar fibers?
Motor learning and motor memory processes
