Lec 5-3 Cerebellum/Eye Movements Flashcards
cerebellum does not have a direct pathway to blank
spinal cord
inputs of cerebellum
all sensory systems
outputs of cerebellum
to motor systems
these come from spinal cord and brainstem and are mostly afferent fibers to the cerebellum
mossy fibers
these come from the inferior olive of the medulla and go to the cerebellum
climbing fibers
only excitatory cell type of the cerebellar cortex
granule cells
purkinje, golgi, stellate, basket cells of cerebellar cortex are all blank
inhibitory
mossy fiber input creates a blank spike in purkinje cells
simple
climbing fiber input creates a blank spike in purkinje cells
complex
this system of spikes is more frequent
mossy fiber
hypothesis is that mossy fibers mediate much of the blank of the cerebellum while climbing fibers mediate blank
work, motor learning
lack of coordination
ataxia
lesions of cerebellum do not affect blank despite all the input
sensation
inability to make rapidly alternating movements
dysdiadochokinesis