Cerebellum Flashcards
cerebellum fxn
planning and fine tuning muscle contractions
cerebellum from….
metoncephalon
cerebellum parts
vermis (midline)
2 intermediate hemispheres
2 lateral hemispheres
flocculonodular lobe
vermis fxn
axial and proximal limb muscles
intermediate fxn
distal musculature
lateral fxn
motor planning
which parts influence CST
lateral and intrermediate
flocculonodular lobe fxn
balance and eye mvmts
input for vermis
spinal cord
input for intermediate
spinal cord
input for lateral
cerebral cortex
inferior olivary nuc
input for flocculonodular
vestibular nuclei (VIII)
tracts out
SCP
superior cerebellar peducle
tracts in
inferior cerebellar peduncle (ICP)
middle cerebellar peduncle (MCP)
cells that leave cerebellum (have influence)
purkinje cells
cells that leave cerebellum (have influence)
purkinje cells
NTs in cerebellum
all cells use GABA except granulse cells (glutamate)
cells in cerebellum
purkinje granule cells stellate cells basket cell golgi cell
fibers in cerebellum
climbing (from olivary nuc)
mossy (from spinal cord, pontine, vestibular)
fibers in cerebellum
climbing (from olivary nuc)
mossy (from spinal cord, pontine, vestibular)
deep nuclei
lateral: dentate
cerebellar lesion (side)
ipsilateral
cerebelllum lesion theme
tremor w/ mvmt
vermis lesion sx
difficult ot maintain posture/balance
motor/cerebellar ataxic gait
motor ataxia vs sensory ataxia
motor has Romberg sign
Romberg sign
sway when close eyes (no more visual help)
cerebellar hemisphere lesion
intention tremor w/ voluntary mvtmt
mostly fine @ rest
dysmetria
dysdiadochokinesis
dysmetria
can’t stop mvmt at right place (measure)
use finger to nose test
dysdiadochokinesis
can’t perform rapidly alternating mvmts
flocculonodular lobe lesion sx
scanning dysarthria
abnormal conjugate gaze
scanning dysarthria
break words into syllables
abnormal conjugate gaze
trouble placing eyes where you want
thiamine + Cb
thiamine def –> trouble for PCs in ant vermis for LL
–> motor ataxia but no signs in UL or cranial
