Funcal regions of cerebellum PT 1

motor cortex and BS

cerebellum exerts its influence by sending info back to ___ to correct movement

cerebellum

tells brain if doing too much/too little and adjusts as needed

synergy, upright posture, tone

3 main roles of cerebellum

ataxia

irregular, uncoordinated movements

lat and intermediate

cerebellar hemisphere that controls limb coordination and motor planning

lat

cerebellar hemisphere that motor planning for extremities

intermediate

cerebellar hemisphere that controls distal limb coordination

middle

cerebellar hemisphere that controls the trunk

middle

cerebellar hemisphere that contains vermis and flocculonodular lobes

lat corticospinal tract

motor pathway of lat cerebellar hemisphere

lat corticospinal and rubrospinal tracts

motor pathways of intermediate cerebellar hemisphere

prox limb and trunk coordination/balance

vermis controls ___

ant cortico, reticulo, vestibulo, tectospinal tracts

motor pathways of vermis

balance and vestibulo-ocular reflex

flocculonodular lobe controls ___

medial longitudinal fasciculus

motor pathway of flocculonodular lobe

deep cerebellar and vestibular nuclei

all outputs from cerebellum go thru

dentate, emboliform, globase, fastigial

parts of deep cerebellar nucleus (lat to medial)

dentate

receives input from lat regions of cerebellum

interposed nuclei (emboliform and globase)

receives inputs from intermediate regions of cerebellum

fastigial and vestibular nuclei

receives inputs from middle regions of cerebellum (vermis and flocculi) to influence the trunk

mossy/climbing fibers

2 kinds of synaptic inputs

mossy fibers

receives inputs from pontine nucleus and other sources

mossy, parallel, purkinje

(___) fibers climb up and bifurcate into ___ fibers as they enter the molecular layer which then synapse by becoming interwoven in ___ fibers that send info down to deep cerebellar and vestibular nuclei

climbing fibers

receives inputs from inf olivary nucleus

climbing, purkinje

(___) fibers weave around and influence ___ fibers which then go down to deep cerebellar and vestibular nuclei

excitatory, cerebellar cortex, inhibitory, deep cerebellar/vestibular nuclei, excitatory

mossy/climbing fibers have an ___ input on ___ then purkinje fibers have an ___ input on ___ which have ___ outputs