Laser-Doppler FlowmetryRegional Blood FlowBlood Flow VelocityMicrocirculationLasersChoroidSkinDoppler EffectUltrasonography, DopplerRetinal VesselsUltrasonography, Doppler, ColorRheologyCerebrovascular CirculationFlowmetersIontophoresisBlood PressureGingival PocketSkin TemperatureInterferometryHyperemiaVasodilationUltrasonography, Doppler, PulsedIntraocular PressureCapillariesPulsatile FlowIschemiaEchocardiography, Doppler, PulsedFingersUltrasonography, Doppler, TranscranialOptic DiskHemodynamicsVasoconstrictionUltrasonographyFovea CentralisVasodilator AgentsEchocardiography, Doppler, ColorLasers, Solid-StateRats, WistarElectromagnetic PhenomenaForearmNitric OxideCross-Over StudiesLaser CoagulationBlood VolumeHeart RateSplanchnic CirculationHindlimbRats, Sprague-DawleyNitroprussideRetinal ArteryUltrasonicsAcetylcholineNG-Nitroarginine Methyl EsterOxygenLaser Therapy, Low-LevelTime FactorsVascular ResistancePressureOcular HypertensionNitric Oxide SynthaseReproducibility of ResultsCalcitonin Gene-Related PeptideEndothelium, VascularBody TemperatureVasoconstrictor AgentsCapsaicinDisease Models, AnimalGlaucoma, Open-AngleDouble-Blind MethodInfusions, IntravenousPerfusionHot TemperatureRaynaud DiseaseSympathetic Nervous System