Raphe NucleiPeptostreptococcusBrain StemPeriaqueductal GrayMedulla OblongataSerotoninReticular FormationNeuronsMicroinjectionsAfferent PathwaysPeptococcusThermoreceptors5,7-DihydroxytryptamineMorphineCell NucleusRats, Sprague-DawleySpinal CordElectroacupunctureElectric StimulationPhysical StimulationEnkephalin, Ala(2)-MePhe(4)-Gly(5)-Periapical AbscessCatsProto-Oncogene Proteins c-fosPainSuppurationHot TemperatureTryptophan HydroxylaseRats, WistarAnalgesics, OpioidSerotonergic Neurons8-Hydroxy-2-(di-n-propylamino)tetralinAction PotentialsReceptor, Serotonin, 5-HT1ANucleus AccumbensReceptors, Serotonin, 5-HT1Serotonin Receptor AgonistsSexologyPsychoanalysisReceptors, SerotoninSolitary NucleusThalamic NucleiSerotonin AntagonistsAutoreceptorsBacteria, AnaerobicCochlear NucleusGram-Positive Bacterial InfectionsNeural PathwaysParaventricular Hypothalamic NucleusPonsCerebellar NucleiSerotonin 5-HT1 Receptor AntagonistsSeptal NucleiActive Transport, Cell NucleusArcuate NucleusCaudate NucleusSuprachiasmatic NucleusLocus CoeruleusSerotonin 5-HT1 Receptor AgonistsSerotonin AgentsMicrodialysisBehavior, AnimalReceptors, Corticotropin-Releasing HormoneRed NucleusHydroxyindoleacetic AcidTrigeminal NucleiSerotonin Plasma Membrane Transport ProteinsSubthalamic NucleusSupraoptic NucleusReceptor, Serotonin, 5-HT1BCorticotropin-Releasing HormoneMesencephalonImmunohistochemistryVesicular Glutamate Transport ProteinsMetergolineAutoradiographyBrainDental PlaqueCinanserinAbscessSerotonin Uptake InhibitorsAmino Acid Transport Systems, AcidicPiperazinesPeriodontitisHelplessness, LearnedPreoptic Area5,6-Dihydroxytryptaminep-ChloroamphetamineCytoplasm