Hematoma, SubduralHematoma, Subdural, AcuteHematoma, Subdural, ChronicSubdural SpaceBrain ConcussionHematomaEmpyema, SubduralHematoma, Subdural, IntracranialHematoma, Epidural, CranialSubdural EffusionTrephiningHematoma, Subdural, SpinalCraniotomyGlasgow Coma ScaleTomography, X-Ray ComputedPupil DisordersArachnoidNeurosurgical ProceduresHead Injuries, ClosedDura MaterRemission, SpontaneousCraniocerebral TraumaAthletic InjuriesFatal OutcomeHematoma, Epidural, SpinalBrain InjuriesMagnetic Resonance ImagingArachnoid CystsSubarachnoid HemorrhageBattered Child SyndromeCerebral Hemorrhage, TraumaticConsciousness DisordersAccidental FallsHockeyAcute DiseaseDrainageShaken Baby SyndromeGlasgow Outcome ScalePostoperative ComplicationsFootballCerebral HemorrhageHeadacheIntracranial HypotensionCranial Fossa, PosteriorPost-Concussion SyndromeCerebral AngiographyPost-Dural Puncture HeadacheSkull FracturesIntracranial AneurysmHead Protective DevicesSkull Fracture, DepressedPneumocephalusBlood Patch, EpiduralDecompression, SurgicalBrain AbscessSubarachnoid SpaceIntracranial HemorrhagesMouth ProtectorsBirth InjuriesTreatment OutcomeRetinal HemorrhageAthletesUnconsciousnessSports MedicineCerebral AqueductLigamentum Flavum