cerebellum Flashcards
what is cerebellum msotly involved in
sensorymotor coordination/control
what is DANISH
dysdiadocokinesia
ataxia (wide legged gait
nystagmus
intention tremor
staccato/slurred speech
hypotonia
what do the peduncles do in the cerebellum
Superior Efferent, from deep cerebellar nuclei to thalamus and superior colliculus.
Middle Afferent, from pontine nuclei (coming from cortex).
Inferior Afferent (vestibular nuclei, spinal cord and brainstem).
Efferent (vestibular nuclei and reticular formation).
what are the 3 divisions of the cerebellum? What do they do?
Cerebrocerebellum: Planning and execution of high skilled movements, temporal sequences and speech.
Spinocerebellum: Coordination of distal movements (lateral and paramedian) and proximal movements and eye movements (vermis).
Vestibulocerebellum: Vestibulo-ocular reflex, posture and equilibrium.
everythign that goes to the cortex will make relay in the
thalamus
thinking about cerebellum and involvement in control of all movement, where do inputs/outputs come from
everywhere that has motor, eg red nucleus, superior calliculi
Purkinje are output or input
output
what lies directly anterior to the cerebellum
fourth bentricle
purkinje cell, which nt
GABA
vestibul-ocular reflex is what
cerebellum corrects the gaze even if eg the road is bumpy or you rotate your head
vestibulo-cerebellum lesion symptoms/signs
ataxia
vertigo (feeling of spinning towards affected side)
nystagmus
spino-cerebellar symptoms/signs
ataxic gait
hypotonia
pendular reflexes (exaggerated pendulous response)
neocerebellum pathology signs/syptoms
intention tremor
dysmetria (miss the target)
dysarthria (slurred speech)
dysdiadochokinesia
spinocerebellar deficit are ipsi or contralateral to the lesion. Why?
ipsilateral
anterior tract decussates twice
posterior does not decussate at all
How many layers in cerebellum? What are they
- Molecular, purkinje, granular
