FormaldehydeFixativesTissue FixationParaffin EmbeddingAnalgesicsPainPain MeasurementInjections, SpinalProctitisNociceptive PainNociceptorsHistocytological Preparation TechniquesTissue PreservationHyperalgesiaSpinal CordMorphineParaffinPreservation, BiologicalHistological TechniquesRats, Sprague-DawleyAcetic AcidBehavior, AnimalImmunohistochemistryStaining and LabelingCarrageenanNaloxoneFacial PainImmunoenzyme TechniquesSpecimen HandlingPain ThresholdAnalgesiaDecalcification TechniqueDisinfectantsEdemaAnalgesics, Non-NarcoticAnalgesics, OpioidAsepsisCyclohexanecarboxylic AcidsAcute PainTime FactorsInjections, SubcutaneousHematoxylinEosine Yellowish-(YS)Proto-Oncogene Proteins c-fosDose-Response Relationship, DrugRats, WistarCaulerpaDihydroergocristinePeganumTolmetinPlant ExtractsReceptors, Neurokinin-1Narcotic AntagonistsHot TemperaturePosterior Horn CellsDisease Models, AnimalFreund's AdjuvantMicrowavesAutopsyFrozen SectionsGlutaralRadiation InjuriesTritrichomonasSubstance PPropiolactoneDissectionAminesDental DisinfectantsInstillation, DrugRotarod Performance TestVisceral PainInflammationPolymerase Chain ReactionToxoidsTissue BanksSterilizationEtherLecythidaceaePlastic EmbeddingMeperidineInjections, IntraperitonealMyrtaceaeRosaniline DyesHindlimbMicrotomyNeuralgiaPhytotherapyAnti-Inflammatory AgentsPolyvinyl AlcoholReceptors, OpioidVaccines, InactivatedMice, Inbred ICRGiardiaAntipyreticsPalatine TonsilNeurokinin-1 Receptor AntagonistsReceptors, Purinergic P2X3HistocytochemistryBiopsyLidocaine