Cerebellum Flashcards
how many lobes in the cerebullum
3
what are the 3 lobes in the cerebellum
anterior, posterior, and flocculondoular
What are the 4 rules of 3 in the cerebellum
3 functional subdivisions, 3 pairs of peduncles, 3 pairs of deep nuclei and 3 cortical layers
what are the 4 functions of cerebullum
Movement coordination, maintenance of posture, maintenance of muscle tone and balance, motor learning
what percentage of neurones in the cerebellum
80%
where is the cerebellum situated
posterior brainstem
what does the cerebellum integrate
sensory input and motor outputs making it an ideal location for motor learning
damage to the cerebellum causes..
severe movement disruption but not complete movement abolition-
what is axtia
abnormal execution of multi jointed voluntary movements (n lack of coordination)
what can axtia be caused by
stroke, multiple sclerosis and tumor/ brain damage
what are the 3 deep cerebellar nuclei
denate, interposed and fastigial nucleus
what is a penduncle
a large bundle of neurons that are in the shape of a stalk
What are the 3 cerebullar penduncies
superior, middle and inferior
what are the 3 cerebellar cortex
cerebrocerebellum, spinocerebellum, vestiobulocerebellum
the cerebellum is connected to the what aspect of the brain stem
dorsal
the cerebellum is connected to the dorsal brainstem by what
3 symmetrical pairs of peduncles
state the 2 facts about the superior peduncle
no input and output to motor cortex - via thalamus and red nucleus
state 2 facts about middle peduncle
no outputs, inputs from motor cortex via pons.
state 2 facts for inferior peduncle
inputs from the inferior olivary nucleus, spinal cord, and vestibular nuclei, outputs to reticular formation - brainstem, spinal cord, and vestibular nuclei.
what does the cerebellar cortex do
integrates inputs from the cortex, brainstem and spinal cord and regulates motor outputs.
what are the 2 inputs for cerebrocerebellum
pons, from motor cortex - via thalamus
inferior olive, motor c. and via red nucleus and spinal cord
what is the output for cerebrocerebellum
denate nucleus , to motor c. via thaalmus
what does the corocerebellum do
involved in motor planning and projects to and from the cerebral, (motor cortex)
cerebrocereebllum is the what hemisphere
lateral ( located on the bottom)
what 2 parts comprise the spinocerebellum
vermis and intermediate cortex
what does the spinocerebellar do
regulates body and limb movements