Pain MeasurementTreatment OutcomeVisual Analog ScaleDouble-Blind MethodQuality of LifeQuestionnairesPain, PostoperativeVisual CortexPainSeverity of Illness IndexProspective StudiesEvoked Potentials, VisualVisual PerceptionVisual AcuityVisual FieldsFollow-Up StudiesDisability EvaluationVisual PathwaysTime FactorsAnesthetics, LocalPsychometricsPilot ProjectsAnalysis of VarianceAnalgesics, OpioidActivities of Daily LivingHealth StatusOutcome Assessment (Health Care)Patient SatisfactionLongitudinal StudiesAnalgesia, Patient-ControlledPsychiatric Status Rating ScalesReproducibility of ResultsLidocaineAnalgesia, EpiduralPruritusCross-Over StudiesSingle-Blind MethodCognitionLumbar VertebraeNeuropsychological TestsPain ManagementInjections, Intra-ArticularAnesthesia, LocalAnalgesiaPattern Recognition, VisualVertebroplastyBupivacaineAnalgesicsPhotic StimulationLow Back PainCognition DisordersTramadolIntervertebral Disc DisplacementMorphineOsteoarthritis, KneeRange of Motion, ArticularSpinal FusionAnalgesia, ObstetricalRecovery of FunctionFatigueFractures, CompressionFibromyalgiaDiskectomyBack PainNerve BlockKetorolacRadiculopathyFentanylStatistics, NonparametricPlacebosChronic DiseaseAcupuncture AnalgesiaHealth Status IndicatorsVisual Field TestsRetrospective StudiesMagnetic Resonance ImagingMeperidineVision DisordersSpinal FracturesSatiationPain PerceptionAnalgesics, Non-NarcoticMolar, ThirdAppetiteAnesthesia, DentalTranscutaneous Electric Nerve StimulationAnti-Inflammatory Agents, Non-SteroidalArthralgiaVision, OcularDyspneaExercise TherapySpinal StenosisFacial PainPain, IntractablePrilocaineManifest Anxiety ScaleArthroscopyArthritis, RheumatoidNeck PainShoulder Pain