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Theme6. MOTOR FUNCTIONS OF CEREBELLUM AND BASAL GANGLIA( (iv.Basic eye…
Theme6. MOTOR FUNCTIONS OF CEREBELLUM AND BASAL GANGLIA(
iii.Abnormalities of Basal Ganglia function: Parkinson´s disease, Huntington´s chorea, Hemiballismus, Tourette syndrome, and Dystonia.
Dystonia
sustainedorintermittentmusclecontractionscausingabnormal,oftenrepetitive,movements
TouretteSyndrome
TicDisorder.Ticsarepersistent(chronic)involuntary,repetitivemovementsandvocalizations.
ii.The basal ganglia in the cerebral circuitry modulating executivemotor functions.
Basal Ganglia
groupofsubcorticalgreymatter
hefunctionsinclude:theplanning-selectionofvoluntarymotormovements,procedurallearning,routinebehaviors(habits),andemotion.
4 Subcortical nuclei
2.- Globus pallidus (Gp)
3.- Subthalamic nucleus
1.- Striatum
4.- Substantia nigra
i.The cerebellum in the cerebral circuitry modulatingvoluntary movements.
Generalities
2.Basalganglia
doesnotinteractwiththespinalcord,butwiththecortexthroughthethalamus.
3.Cerebellum
:eceivespropioceptiveinputsfromthespino-cerebellarandolivo-cerebellartracts.
1.Cerebellum
indirectlyinfluencesthemotoractivityofthecortexandthespinalcordthroughthethalamus
iv.Basic eye movements and sensory integration.
CNIII,IVandVI,whichhaveinputsfromthevestibularapparatus,
TheReticularFormationofthePonsandMidbrainandtheconnectionswiththesuperiorcolliculus
Thecontrolofeyemovementsandvisualattentionisoneofthemostimportantfactorsintheregulationofskilledmovementsofthebody.