Injections, SpinalNerve BlockAnesthesia, SpinalBupivacaineSpinal CordFemoral NerveSciatic NerveAnesthetics, LocalMandibular NerveInjectionsSpinal Cord InjuriesPeripheral NervesAutonomic Nerve BlockLidocaineSpinal NervesObturator NerveBrachial PlexusMepivacaineSpinal Nerve RootsPain, PostoperativeLumbosacral PlexusPain MeasurementNerve FibersAnesthesia, DentalZygapophyseal JointMaxillary NerveOptic NerveAmidesIntercostal NervesNerve RegenerationInguinal CanalPeripheral Nerve InjuriesTibial NerveAnesthesia, ConductionDental Pulp TestMedian NerveAnalgesiaSpinal Cord DiseasesInjections, Intra-ArticularAmbulatory Surgical ProceduresNeedlesPrilocaineSpinal Cord NeoplasmsSpinal CanalRats, Sprague-DawleySpinal DiseasesNerve EndingsAdjuvants, AnesthesiaSural NerveTrigeminal NerveAnesthesia, LocalSpinal Cord CompressionNerve CrushMotor NeuronsTime FactorsOrthopedic ProceduresSpinal NeoplasmsFacial NervePainUlnar NerveInjections, IntravenousHypogastric PlexusElectric StimulationNeural ConductionInjections, IntramuscularSpinal StenosisFemoral NeuropathyHeart BlockNeuralgiaSensitivity and SpecificityUltrasonography, InterventionalSpinal Fusion