Laser-Doppler FlowmetryRegional Blood FlowChoroidBlood Flow VelocityLasersMicrocirculationSkinDoppler EffectRetinal VesselsGingival PocketCerebrovascular CirculationUltrasonography, DopplerSkin TemperatureInterferometryIontophoresisHyperemiaVasodilationBlood PressureUltrasonography, Doppler, ColorIntraocular PressurePulsatile FlowOptic DiskFingersFovea CentralisVasoconstrictionCapillariesIschemiaVasodilator AgentsUltrasonography, Doppler, PulsedCross-Over StudiesNitric OxideBlood VolumeRheologySplanchnic CirculationHemodynamicsRats, Sprague-DawleyRats, WistarForearmNG-Nitroarginine Methyl EsterOxygenNitroprussideEchocardiography, Doppler, PulsedAcetylcholineOcular HypertensionUltrasonography, Doppler, TranscranialPressureNitric Oxide SynthaseBody TemperatureCalcitonin Gene-Related PeptideRetinal ArteryHeart RateEchocardiography, Doppler, ColorVasoconstrictor AgentsCapsaicinEndothelium, VascularUltrasonographyGlaucoma, Open-AngleInfusions, IntravenousAortic Arch SyndromesDisease Models, AnimalDouble-Blind MethodLasers, Solid-StateHot TemperaturePerfusionSympathetic Nervous SystemTime FactorsBrain IschemiaHindlimbLaser CoagulationGastric MucosaArginineDose-Response Relationship, DrugElectric StimulationAnalysis of VarianceLaser Therapy, Low-LevelOxygen ConsumptionEnzyme InhibitorsCase-Control StudiesBrainRaynaud DiseaseBlood CirculationLasers, ExcimerReproducibility of ResultsOphthalmic ArteryRetinal VeinTympanic MembraneUltrasonography, PrenatalVascular ResistanceFootToesUmbilical Arteries