Electric Stimulation TherapyDeep Brain StimulationTreatment OutcomeSubthalamic NucleusElectric StimulationGlobus PallidusParkinson DiseaseElectrodes, ImplantedHypokinesiaStereotaxic TechniquesSelf StimulationEssential TremorTranscranial Magnetic StimulationDystoniaAntiparkinson AgentsBrainBrain MappingThalamusBrain ChemistryDyskinesiasLevodopaTremorBasal GangliaBrain InjuriesElectrodesSubthalamusMedial Forebrain BundleMovement DisordersBrain NeoplasmsBiomedical EnhancementMagnetic Resonance ImagingBeta RhythmInternal CapsuleDystonic DisordersNeuronsModels, NeurologicalFunctional LateralityNeural PathwaysPedunculopontine Tegmental NucleusStimulation, ChemicalTime FactorsMotor CortexMuscle Rigidity