cerebellum Flashcards
function of the cerebellum
coordinate muscle action
learn motor tasks
regulate muscle tone and posture
where does output of the cerebellum go to
brainstem and thalamus
cerebellum input
sensory input
what happens when the cerebellum is damaged
abnormalities in equilibrium, muscle tone, posture and coordination
- no sensory or motor loss
basic organization of cerebellum
excitatory inputs to cerebellar cortex
inhibitory outputs from purkinje cells to deep cerebellar nuclei
excitatory outputs from deep cerebellar nuclei
input from pontocerebellar tract goes through what
middle cerebellar peduncle
pontine nuclei holds what functions
many cortical areas project
lesions of inferior olive are equivalent to what
loss of entire contralateral cerebellar cortex
vestibulocerebellum function
movement of head and coordinated nystagmus
spinocerebellum function
proprioception and kinesthetics
input from extremities to form coordinated response
cerebrocerebellum tract
cortex to pontine nuclei to cerebellum to cerebellar nuclei to thalamus to motor cortex
features of cerebellar dysfunction
ataxia of trunk of vermis, appendage ataxia if lateral parts
wide base stance
intention tremor, postural tremor, dysmetria and dysdiadochokinesia
dysdiadochokinesia
incoordination with rapid alternating movements
midline damage to cerebellum
postural instability and LE ataxia
lateral damage to cerebellum
limb ataxia, muscle tone and reflex changes ipsilateral to lesion
