HyperventilationHypocapniaCarbon DioxideCerebral ArteriesCerebrovascular CirculationRespirationAlkalosis, RespiratoryCerebral InfarctionAsthma, Exercise-InducedMiddle Cerebral ArteryBrainPartial PressureCerebral PalsyHypercapniaNeurologic ExaminationOxygenNervous System DiseasesBlood Gas AnalysisCerebral AngiographyIntracranial PressureInfarction, Middle Cerebral ArteryRespiratory MechanicsBrain IschemiaHypoventilationPanicMalaria, CerebralChemoreceptor CellsPulmonary VentilationOxygen ConsumptionCerebral VeinsRitodrineBlood Flow VelocityCerebral HemorrhageAnoxiaPulmonary Gas ExchangePanic DisorderApneaMagnetic Resonance ImagingTidal VolumeAcid-Base EquilibriumMouth ProtectorsAtropine DerivativesAirway ResistanceBlood Gas Monitoring, TranscutaneousBlood PressureIntracranial HypertensionPlethysmography, ImpedanceTime FactorsMethacholine CompoundsAcidosisSpectroscopy, Near-InfraredNystagmus, PhysiologicBrain DiseasesXenon RadioisotopesIschemic Attack, TransientCold TemperatureRespiratory Physiological PhenomenaCapnographyForced Expiratory VolumeChloraloseBronchial Provocation TestsTrimethaphanAlkalosisRespiratory Function Tests