HyperventilationHypocapniaCarbon DioxideCerebral ArteriesCerebrovascular CirculationRespirationAlkalosis, RespiratoryCerebral InfarctionAsthma, Exercise-InducedMiddle Cerebral ArteryPartial PressureHypercapniaCerebral PalsyBrainOxygenBlood Gas AnalysisRespiratory MechanicsCerebral AngiographyIntracranial PressureHypoventilationPanicInfarction, Middle Cerebral ArteryChemoreceptor CellsPulmonary VentilationMalaria, CerebralOxygen ConsumptionRitodrineCerebral VeinsBrain IschemiaBlood Flow VelocityPulmonary Gas ExchangeAnoxiaPanic DisorderApneaTidal VolumeAcid-Base EquilibriumMagnetic Resonance ImagingCerebral HemorrhageMouth ProtectorsAtropine DerivativesAirway ResistanceBlood Gas Monitoring, TranscutaneousPlethysmography, ImpedanceMethacholine CompoundsBlood PressureIntracranial HypertensionTime FactorsNystagmus, PhysiologicXenon RadioisotopesCold TemperatureAcidosisSpectroscopy, Near-InfraredRespiratory Physiological PhenomenaCapnographyForced Expiratory VolumeChloraloseBronchial Provocation TestsTrimethaphanAlkalosisRespiratory Function Tests