03 JULY 2019 Flashcards
pontocerebellar is
intended control
what want to do
spinocerebellar is
what you are actually doing
brainstem / motor cortex
are the corrections
purkinji cells handle
output from the cerebellar cortex
white matter deep in the cerebellum handles
projections to cerebellar nuclei
cerebellar nuclei project to the
brain-stem UMN
cerebral cortex UMN
vertical divisions has what three things?:
midline vermis
paravermal hemisphere
lateral hemisphere
inferior input comes from
the spinal cord and the brainstem
cerebellar peduncles handle
inferior input which….
middle input which…
superior input which…
middle input comes from
input from pontine nuclei
superior input comes from
output to brainstem and cerebral cortex
the vertical divisions include :
midline vermis
paravermal hemisphere
lateral hemisphere
the punkinje cells
take results of processing and takes them to the base of the cerebellum
deep cerebral nuclei takes messages to the
brainstem UMN
cortex UMN
so the deep cerebral nuclei take message of:
fine and gross motor
inputs from the spinal cord are
spinocerebellar
- discriminative touch
- nonconscious proprioception
inputs from the reticular formation:
- level of arousal
- sense of urgency
the svestibular system inputs are
“inner ear”
head movement pull of gravity
what inputs are the what I am really doing:
spinal cord
reticular formatino
vestibular system
the inputs that are what I meant to do is
ponte nuclei
inputs from the ponte nuclei are
the verox copy
they go from the cerebrum - pons - cerebellum
the verstibulocerebellum has what structure?
flocculondodular lobe
the spinocerebellum division has what structure?
the vermis adn the paravermis
the cerebrocerebellum division has what structure?
the lateral hemispheres
what is the input for the vestibulocerebellum?
the vestibular receptors
what is the output for the vestibular nuclei?
vestibular neclei (then to_
- eye muscles
- postural muscles
what is the function of the vestibulocerebellum:
equilibrium:
vestibulocerebellum
- input
- output
- function:
- vestibular receptors
- vestibular nuclei (then to)
- eye mm
- postural mm - equilibrium
why is the grey matter in the cerebellum so PACKED
it has all the cells of the verox copy and all the cells of what the body is actually supposed to be doing
the spinocerebellum input:
spinocerebellar tract
sensorimotor cortex
the spinocerebellum output:
- medial division:
cerebral cortex
brainstem
the medial division of the spinocerebellum output goes to what two things?
the cerebral cortex
brainstem
the spinocerebellum function:
-control core and proximal mm
spinocerebellum
- input
- output
- function:
1. spinocerebellar tracts sensorimotor cortex 2. medial division - cerebral cortex - brainstem 3. core and proximal
cerebrocerebellum input
cerebral cortex
esp. cerebropontocerebellar
cerebrocerebellum output:
lateral division UMN
- cerebral cortex
cerebrocerebellum functions:
coordinate voluntary movement
plan movements
timing
cerebrocerebellum
1. input
2 output
3. functions
- cerebral cortex
- lateral division UMN
- cerebral cortex - coordinate volutnary movement
plan movements
timing
nonconscious internal feedback pathways have how many pathways?
two total
each pathway in the nonconscious internal feedback pathway has how many neurons?
each pathway has 1 neuron
the midline vermis controls:
axial skeleton
the midline of “me”
the paravermal hemispehre controls:
either side of the middle
most proximal joints
shoulder and hips
the lateral hemisphere controls the
most distal Mm
the flocculonodular lobe is not
vertical
the function of the flocculonoclular lobe is to
maintain equilibrium
overall:
plays w/ vertical divisions
funny name for the flocculonocular lobe:
the handlebar moustache of the cerebellum
name three functions regions of the cerebellum:
- equilibrium
- gross movement of limbs
3 fine distal voluntary
equilibrium of the cerebellum handles:
keeping you upright against gravity
on balance while doing movement
“anticipatory” movements
gross movement of the limbs involves:
puts limbs into position of moment
fine distal voluntary functions of the cerebellum involves:
does all the heavy duty fine control to actually do activity
eye muscles in the vestibulocerebllum are important because
they help maintain a steady gaze = critical for balance
postural muscles in the verstibulocerebellum system?
they facilitate the Mm to keep you upright
the spinocerebrallar tracts have input for
discriminative touch
nonconsicous proproception
the sensorimotor cortex tell you
what I meant to do
vestibulospinal helps
keep yourself upright against gravity
the medial vestibulospinal helps with
core proximal muscles
the lateral vestibulospinal helps with
rest of LE
the restilospinal fx is
to keep things up against gravity
the spinocerebellar pathway is
nonconscious movement
and is four pathway merged into one
the function of the spinocerebellar pathway is
disciminative touch
nonconscious proprioception that is headed to the cerebellum
the spinocerebellar pathway has four important details:
- has 2 high fidelity pathways
- each pathway has 2 neurons
- somatosensory input from the body
- project to cerebellum ipsilaterally
the spinocerebellar pathway projects
to the cerebellum ipsilaterally
the spinocerebellar has how many pathways and how many neurons
2 high fidelity the pathways and 2 neurons per pathway
the spinocerebellar input is
somatosensory from the body
the verox copy comes from the
pons
the verox copy travels through what pathway
the cerbropontocerebellar
the verox copy pathway is input forwhaty system?
the cerbrocerellum
the cerebrocerebellum has how much control over voluntary movement
HIGH
ataxia def:
incoordination not due to muscular weakness
three types of damage:
vermal and floculonodular damage
spinocerebellar damage
cerebrocerellar damage
vermal and floculondular damage leads to
truncal axtaxia
- trouble controlling the trunk
spinocerebellar damage causes
gait ataxia and limb ataxia
trouble walking = getting trunk over the hips
cerebrocerebellar damage:
hand ataxia
- difficulty w/ hand fine motor coordination
spinocerebellum damage causes what two things:
- gait ataxia
2. limb ataxia
gait ataxia means that
you have a wide based unsteady staggering
veering
gait ataxia means that
the trunk is always chasing after the hips
truncal axtia means that
you have trouble controlling the trunk Mm
hand axtia means that
you have difficulty with hand fine motor coordination
hand ataxia is caused from
damage by the cerebrocereballar damage
gait ataxia is caused from
damage by the spinocerebellum
cerebral dysfunction is always
ipslateral in affect
