Locus CoeruleusAdrenergic NeuronsDopamine beta-HydroxylaseTyrosine 3-MonooxygenaseNorepinephrineNeuronsGenetic LociReceptors, Adrenergic, alpha-2Rats, Sprague-DawleyNorepinephrine Plasma Membrane Transport ProteinsPonsRaphe NucleiGalaninReceptors, Opioid, muCorticotropin-Releasing HormoneAdrenergic alpha-2 Receptor AntagonistsBrain StemReceptor, Galanin, Type 3Quantitative Trait LociClonidinePiperoxanAdrenergic alpha-AgonistsMedetomidineImidazoline ReceptorsReceptor, Galanin, Type 1MorphineReceptor, Galanin, Type 2NaloxoneOpioid PeptidesDroxidopaMicroinjectionsReceptors, CatecholamineYohimbineMorphine DependenceProto-Oncogene Proteins c-fosAdrenergic alpha-AntagonistsBehavior, AnimalBenzylaminesIdazoxanArousalEnkephalin, MethionineChromosome MappingBrainNeuropeptidesNeural PathwaysBiogenic MonoaminesAdrenergic Uptake Inhibitors