Ultrasonography, Doppler, TranscranialTranscranial Magnetic StimulationUltrasonography, Doppler, ColorUltrasonographyUltrasonography, DopplerCerebral ArteriesBlood Flow VelocityUltrasonography, Doppler, PulsedCerebrovascular CirculationEvoked Potentials, MotorMiddle Cerebral ArteryDoppler EffectCerebral InfarctionMotor CortexUltrasonography, PrenatalEchoencephalographyEchocardiography, Doppler, PulsedCerebral AngiographyCerebral PalsyEchocardiography, Doppler, ColorBrainUltrasonography, Doppler, DuplexBrain IschemiaSensitivity and SpecificityCerebral VeinsIntracranial Embolism and ThrombosisMagnetic Resonance ImagingInfarction, Middle Cerebral ArteryProspective StudiesPulsatile FlowRegional Blood FlowLaser-Doppler FlowmetryCircle of WillisIntracranial EmbolismFunctional LateralityTomography, X-Ray ComputedCerebrovascular DisordersReproducibility of ResultsMalaria, CerebralCerebral HemorrhageContrast MediaPyramidal TractsEndosonographyPredictive Value of TestsIschemic Attack, TransientElectromyographyStrokeTime FactorsCarotid StenosisPregnancyElectric StimulationUltrasonography, InterventionalBasilar ArteryPhosphenesArterial Occlusive DiseasesUmbilical ArteriesMonitoring, IntraoperativeCarotid Artery DiseasesIntracranial PressureSubarachnoid HemorrhageUltrasonography, MammaryUltrasonicsAnterior Cerebral ArteryHandDominance, CerebralBlood PressureTreatment OutcomeVasospasm, IntracranialHemodynamicsMagneticsEmbolism, AirValsalva ManeuverElectroencephalographyAnalysis of VarianceElectromagnetic FieldsImaging, Three-DimensionalObserver VariationCarotid ArteriesPosterior Cerebral ArteryReference ValuesCarbon DioxideReaction TimeVascular ResistanceSkullBrain DiseasesImage EnhancementVertebral ArteryMagnetic Resonance AngiographyGestational AgeRetrospective StudiesFetal DiseasesAngiography, Digital SubtractionSulfur HexafluorideAcetazolamideImage Processing, Computer-AssistedCerebrumIntracranial AneurysmFollow-Up StudiesParietal LobeElectric Stimulation Therapy