Ultrasonography, Doppler, TranscranialTranscranial Magnetic StimulationUltrasonography, Doppler, ColorUltrasonographyUltrasonography, DopplerUltrasonography, Doppler, PulsedEvoked Potentials, MotorBlood Flow VelocityDoppler EffectMotor CortexUltrasonography, PrenatalEchoencephalographyEchocardiography, Doppler, PulsedCerebrovascular CirculationEchocardiography, Doppler, ColorMiddle Cerebral ArteryCerebral ArteriesUltrasonography, Doppler, DuplexSensitivity and SpecificityPulsatile FlowIntracranial EmbolismProspective StudiesEndosonographyPyramidal TractsLaser-Doppler FlowmetryReproducibility of ResultsContrast MediaFunctional LateralityElectromyographyRegional Blood FlowIntracranial Embolism and ThrombosisPredictive Value of TestsCircle of WillisUltrasonography, InterventionalPhosphenesElectric StimulationMagnetic Resonance ImagingMonitoring, IntraoperativePregnancyUltrasonography, MammaryTomography, X-Ray ComputedUmbilical ArteriesUltrasonicsCarotid StenosisHandMagneticsElectromagnetic FieldsStrokeValsalva ManeuverTime FactorsCerebral AngiographyCerebrovascular DisordersObserver VariationCarotid Artery DiseasesReaction TimeSkullSulfur HexafluorideImaging, Three-DimensionalElectromagnetic PhenomenaDiastoleFetal DiseasesArterial Occlusive DiseasesEmbolism, AirElectric Stimulation TherapyTreatment OutcomeAnalysis of VarianceHemodynamicsBasilar ArteryBrainImage EnhancementReference ValuesTransducersVascular ResistanceOphthalmic ArteryGestational AgeCarotid ArteriesCarotid Artery, InternalVertebral ArteryParietal LobePlacental CirculationRetrospective StudiesCerebral Arterial DiseasesElectroencephalographyBrain IschemiaBlood PressurePsychomotor PerformanceFollow-Up StudiesAngiography, Digital SubtractionNeural InhibitionBrain MappingMicrobubblesAngiographyMuscle, SkeletalUterusMovementCollateral CirculationEchocardiographySystoleEndarterectomy, CarotidFetal Growth Retardation