Blood Flow VelocityNeural ConductionEchocardiography, DopplerPulsatile FlowUltrasonography, DopplerDiastoleUltrasonography, Doppler, TranscranialBiomechanical PhenomenaRheologyUltrasonography, Doppler, ColorEchocardiography, Doppler, PulsedUltrasonography, Doppler, PulsedTime FactorsMovementMiddle Cerebral ArterySystoleCerebrovascular CirculationRotationEchocardiography, Doppler, ColorRegional Blood FlowAccelerationNystagmus, PhysiologicReflex, Vestibulo-OcularEye MovementsMitral ValvePulse Wave AnalysisCoronary CirculationPulseBlood PressureHemodynamicsMyocardial ContractionMotion PerceptionPursuit, SmoothVentricular Function, LeftMuscle ContractionKineticsModels, CardiovascularOphthalmic ArteryElasticityAction PotentialsLaser-Doppler FlowmetryCerebral ArteriesReproducibility of ResultsHead MovementsIsotonic ContractionEchocardiographyReference ValuesDoppler EffectHydrodynamicsModels, BiologicalVascular ResistanceArteriesAir MovementsRetinal ArteryGaitUmbilical ArteriesAtrial Function, LeftUltrasonography, PrenatalSaccadesElectromyographyHeart RateHeart VentriclesVentricular Dysfunction, LeftProspective StudiesMuscle, SkeletalIsometric ContractionUltrasonography, Doppler, DuplexMotionNystagmus, OptokineticUltrasonographyStroke VolumeVideo RecordingVestibule, LabyrinthStress, MechanicalPostureMicrocirculationObserver VariationDogsComputer SimulationViscosityHeartPredictive Value of TestsPhysical PhenomenaAnkleAnalysis of VarianceVentricular FunctionWater MovementsMotor NeuronsSensitivity and SpecificityCatsEchoencephalographyAortaUlnar NerveHemorheologyReaction TimeMathematicsPostural BalanceSwimmingElectric StimulationFetal Heart