CraniotomySuperficial Back MusclesObserver VariationNeurosurgical ProceduresPneumocephalusReproducibility of ResultsFrontal BoneHematoma, Subdural, AcuteTomography, X-Ray ComputedTrephiningHead Injuries, PenetratingBrain NeoplasmsDelayed Emergence from AnesthesiaHematoma, SubduralIntracranial AneurysmMagnetic Resonance ImagingDura MaterSurgical Fixation DevicesMeningeal NeoplasmsSupratentorial NeoplasmsFrontal SinusTreatment OutcomeMeningiomaIntraoperative ComplicationsArachnoid CystsSubdural SpaceMicrosurgeryLenses, IntraocularGlasgow Coma ScaleHematoma, Epidural, CranialHematoma, Subdural, ChronicCerebrospinal Fluid RhinorrheaRetrospective StudiesTemporal BoneCranial Fossa, AnteriorFourth VentricleStereotaxic TechniquesBrain AbscessTime FactorsNeurosurgeryHematoceleSurgical InstrumentsPostoperative ComplicationsCerebellar DiseasesVentriculostomySurgical FlapsSkull BaseConsciousness MonitorsBrain InjuriesCranial Nerve NeoplasmsSkull FracturesProspective StudiesCerebral AngiographySubarachnoid HemorrhageSensitivity and SpecificityAneurysm, RupturedSkull Base NeoplasmsConscious SedationCerebral VeinsIntracranial HemorrhagesDecompression, SurgicalCraniopharyngiomaBrazilBrain DiseasesAnterior Cerebral ArteryOrbitCranial Fossa, MiddleNeuroendoscopyIntracranial Hemorrhage, HypertensiveSkullMonitoring, Intraoperative