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Stack #37558

Neuoranatomy Thalamic Nuclei

QuestionAnswer
VA thalamic nucleus function basal ganglia
LGN - thalamic nucleus function vision
MGN - thalamic nucleus function hearing
DM - thalamic nucleus functino olfactory
Parkinson's Disease resting tremor
Parkinson's Disease difficulty initiating movement due to losss of dopaminergic neurons in substantia nigra
Huntington' Disease (Chorea) inability to stop moving due to a genetic defect which causes cellular loss in striatum (especially the caudate nucleus)
Hemiballismus flailing of limbs on one side due to damage to subthalamic nucleus
Inferior Cerebellar Peduncles input from spinal cord and vestibular apparatus
Middle Cerebellar Peduncles input from cortex
Superior Cerebellar Peduncles output to cortex and other structures
Flocculonodular lobe staying upright
Flocculonodular lobe damage by medulloblastoma in kids causes trucal ataxia
Trucal ataxia broad stance, swaying of trunk in attempt to stay upright
Anterior lobe walking in autopilot
Anterior lobe damage by stroke involving the superior cerebellar artery causes gait ataxia
Gait ataxia (difficulty walking) assessed by heal to shin test
Posterior Lobe precision and learned, complex movements
Posterior Lobe damage by toxins (ethanol, heavy metals) to Purkinje cells or stoke involving PICA or AICA
Posterior Lobe causes intension tremor, overshooting, dysdiadocokinesia
dysdiadocokinesia inability to rapidly alternate btwn. supination & pronation of hand
Created by: JYarger
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