ScalpCraniotomyElectrodesFetal MonitoringElectroencephalographyElectrodes, ImplantedEvoked PotentialsIon-Selective ElectrodesElectrochemistryElectrochemical TechniquesNeurosurgical ProceduresPneumocephalusMicroelectrodesSubdural SpaceFrontal BonePotentiometryHematoma, Subdural, AcuteTrephiningFluorocarbon PolymersAlopeciaGraphiteEquipment DesignBiosensing TechniquesDura MaterHead Injuries, PenetratingElectric StimulationStereotaxic TechniquesTemporal BoneBrain NeoplasmsGoldMeningeal NeoplasmsDelayed Emergence from AnesthesiaHematoma, SubduralMagnetic Resonance ImagingIntracranial AneurysmCochlear ImplantsConductometrySurgical Fixation DevicesTomography, X-Ray ComputedSupratentorial NeoplasmsCochlear ImplantationElectric ImpedanceMeningiomaFrontal SinusEnzymes, ImmobilizedArachnoid CystsMicrosurgeryHairDermatitis, SeborrheicCarbonEpilepsySignal Processing, Computer-AssistedGlasgow Coma ScaleHematoma, Epidural, CranialElectricityElectric Stimulation TherapySurgical FlapsElectromyographyHematoma, Subdural, ChronicBrainCerebrospinal Fluid RhinorrheaDeep Brain StimulationNeurosurgeryEquipment Failure AnalysisSkullTime FactorsMonitoring, IntraoperativeCranial Fossa, AnteriorAction PotentialsFourth VentricleBioelectric Energy SourcesPostoperative ComplicationsBrain AbscessSkull FracturesElectrophysiologyTin CompoundsSilver CompoundsHematoceleBrain MappingSurgical InstrumentsBrain InjuriesCerebellar DiseasesVentriculostomy