Flashcards in NMP DUKE midterm Deck (50)
is folded under the occipital lobe; if opened, you can see the vermis along the midline,
surrounded by the paravermis (intermediate lobe) and the lateral hemisphere/lobe
runs along lateral side of the cerebellum
it specializes in coordination of motor activity; it does not initiate or control movement
1. Archicerebellum (vestibulocerebellum)
2. Paleocerebellum (spinocerebellum)
3. Neocerebellum (corticocerebellum)
long, narrow, midline structure with many crimps; terminates as the uvula
Primary fissure = deepest fissure of
vermis + paravermis; the middle region; remember the spinocerebellar tracts terminate in the vermis & paravermis (paravermis = intermediate lobe)
lateral hemispheres/lobes; it develops with
Function of Neo + Paleo
coordination of muscles for the purpose of
The vermis & paravermis (termination of cerebellar tracts) contain
broken somatotopic map
Two differences of cerebellar somatotopic map
from neocortical somatotopic map
1.Adjacent parts of the body are not perfectly
in line with each other; the representation is topsy
2. Body parts may be represented multiple times;
there could be two index fingers, or two forearms; this is because there are many cerebellar tracts entering, each bringing a map , and they don't overlap perfectly
cerebellar white matter
purkinje layer (main cells)
main neurons of cerebellum
There is one giant dendrite that bifurcates endlessly, but it sends out only one axon,
which terminates on a group of cells deep
in the white matter
where do purkinje fibers terminate?
deep cerebellar nuclei
What is the arrangement of the entire
purkinje---->deep cerebellar nuclei----->out of cerebellum
Main afferents of the cerebellum
the mossy/parallel fiber system
cluster of mossy fibers and granule cells together
cerebellar afferent fibers that don't go to granule cells in rosettes
Where do climbing fibers go?
straight to the surface and split to synapse on the purkinjes
Where do climbing fibers come from?
climbing fibers are axons from the inferior olive (olivocerebellar fibers)
Where do climbing fibers enter the cerebellum?
T or F
climbing and parallel fibers are excitatory to the purkinjes?
purkinje firing rate----normal
purkinje firing rate-----excited
T or F
purkinje cells are excitatory on deep cerebellar nuclei.
T or F
deep cerebellar nuclei are excitatory on everything outside the cerebellum.
T or F
If the deep cerebellar nuclei are stimulated by purkinje cells the will inhibit the outside the cerebellum.
purkinje inhibit deep cerebellum nuclei which excites the outside through double inhibition