UnconsciousnessConsciousnessAnestheticsAnesthetics, IntravenousPropofolAnesthetics, InhalationDelayed Emergence from AnesthesiaAnesthesia, GeneralAnesthetics, LocalElectroencephalographyAnesthesiaIsofluraneMethyl EthersAnesthetics, GeneralConsciousness DisordersMonitoring, IntraoperativeHypnotics and SedativesPhysostigmineEvoked Potentials, AuditoryElectrooculographyHalothaneEntropyWakefulnessCraniocerebral TraumaAnesthetics, CombinedEnfluraneLidocaineBrainDose-Response Relationship, DrugCholinesterase InhibitorsAnesthetics, DissociativeAnesthesia, LocalMethoxyflurane