Cerebellum-Sievert Flashcards
What is the primary fcn of the cerebellum?
to detect difference in intended movement & actual movement (motor error)
T/F Neuronal activity of the cerebellum is relatively static.
False. It is quite dynamic. continually changing while someone is performing a movement
Patients with cerebellar damage exhibit which problems?
problems with range, rate, and direction of movement this includes: cerebellar ataxia dysmetria dysdiadochokinesia tremo
What is cerebellar ataxia?
this is like the bar walk
What is dysmetria?
this is where you can’t follow a finger, oscillate & overshoot or undershoot
What is dysdiadochokinesia?
inability to perform rapid alternating movements
pancake hands not possible
What does a tremor caused by cerebellar damage look like?
an intention tremor with dominant end point feature
fine when you are sitting, but when you are asked to perform a movement-tremor.
Where does the cerebellum receive info from?
receives information from proprioceptors of the body via the dorsal spinal cerebellar tract.
Also receives info from the cortex (this is what I’ve told the muscles to do, cerebellum, let me know if they do it or not).
makes a comparison…sends info back to the cortex.
What type of attachments are the cerebellar peduncles involved in? How many are there?
attach the cerebellum to the brainstem
Superior
Inferior
Middle
What’s the deal with the superior peduncle?
this is an outflow peduncle
it heads superiorly towards higher centers
What’s the deal with the inferior peduncle?
this is an inflow peduncle
the info comes from the spinal cord
What’s the deal with the middle peduncle?
this is the largest, most massive peduncle & comes out of the pontine nuclei
its info goes straight down below
What are the special little jewels that you find in the inner white matter of the cerebellum?
these are the deep cerebellar nuclei
the fastigial, globus, emboliform, dentate nuclei
What do the globus & emboliform nuclei combine to form?
they make up the interpositous nuclei.
T/F The cerebellar zones each match with a different set of nuclei.
True! There are 3 & 3.
What can you see on the ventral surface of the cerebellum?
see the 3 peduncles
see flocculonodular lobe
see vermis
etc.
Which areas of the ventral cerebellum make up the spinocerebellar lobe? What is this lobe responsible for?
the vermis, midline, & paramedian areas
**day to day activities, planned, controlled movements
Which areas of the ventral cerebellum make up the cerebrocerebellum? What is this lobe responsible for?
the lateral lobes
**planning & organization of movement
premotor cortex communicates with it
Which areas make up the vestibulocerebellum? What is this lobe responsible for?
the flocculus on both sides
the nodulus in the middle
**posture & gait
T/F Only the spinocerebellum carries out the stereotypical cerebellar fcn of comparing the cortex’s instructions w/ muscles’ actions.
FALSE. All parts of the cerebellum carry out this function in their own ways.
Give more detail about the function of the spinocerebellar lobe.
receives input from spinal cord about muscles spindles
receives input from cortex about execution of movements & fine control of distal & proximal muscles
Give more detail about the function of the cerebrocerebellar lobe.
receives input from motor & premotor cortex & sensory association areas related to planning of movements
**largest area of the cortex
has the most inputs & outputs
Give more detail about the function of the vestibulocerebellar lobe.
receives input from vestibular system & visual system to control eye movements & balance
Which of the deep nuclei is the cerebrocerebellum associated with?
the most laterally located deep nuclei
dentate nuclei
Which of the deep nuclei is the spinocerebellum associated with?
the fastigial & interpositus nuclei
Which nuclei are the vestibulocerebellum associated with?
the vestibular nuclei…these are outside of the brainstem.
The right half of the cerebellum has control over which side of the body?
the right side of the body
When the cortex talks to the cerebellum or the cerebellum talks to the cortex…do they talk via the same side or opposite sides?
opposite sides
When the spinal cord or vestibular nuclei talk to the cerebellum…do they remain on the same side or do they cross?
they remain ipsi
Proprioceptors from the right arm end up at which part of the cerebellum?
they end up at the right cerebellum
