Cerebellum Flashcards
What is the role of the cerebellum?
Coordinates willed muscle contractions of ongoing movements
What are the 3 lobes of the cerebellum (transversely)?
Anterior, posterior and flocculondular
What are the 3 lobes of the cerebellum (longitudinally)?
right and left hemisphere with a midline vermis
What is the cerebellum a derivative of?
Metencephalon
The flocculondar lobe constitutes the ____________
vestibulocerebellum
Higher levels animals (with limbs) evolved a second portion of the cerebellum to receive most of the proprioceptive input from limbs and trunk called the _____.
anterior lobe
What is the function of the posterior lobe of the cerebellum?
receives input from the cortiocpontocerebellar and olivocerebellar pathways
What input does the inferior peduncle receive?
Spinocerebellar, trigeminocerebrall, inferior oliver and vestibular nerve
What outputs does the inferior peduncle act on?
Tectospinal, Vestibulospinal, and recticulospinal
What is the function of the middle peduncle?
composed of axons heading into the cerebellum from cells of the basilar pons as pontocerebellar fibers that cross the midline
What is the major efferent cerebellar pathway?
The superior peduncle (brachium conjuctivum)
Describe the pathway of the brachium conjuctivum.
Exit the superior peduncle–> cross the brain to enter the Red nucelus and VA/VL nuclei–> premotor and motor cortex
The cerebellum deals with the _________ side of the body, the motor cortex deals with the ________ side of the body
IPSILATERAL; CONTRALATERAL
What are climbing fibers
They form terminals directly onto purkinge cells and arise ONLY from cells on the inferior olive and enter via the inferior peduncle going to ALL cerebellar lobes
Mossy fibers form axon terminals on ______
cerebellar granule cells (which then go to purkinge cells)
