Muscle RelaxationBehavior, AnimalRelaxation TherapyRelaxationVasodilationBehavioral SymptomsAcetylcholineNitric OxideMotor ActivityBehavioral SciencesVasodilator AgentsMuscle ContractionBehavioral MedicineEndothelium, VascularNitroarginineDose-Response Relationship, DrugBiological FactorsMuscle, SmoothNitroprussideBehaviorRats, Sprague-DawleyGenetics, BehavioralBehavioral ResearchMuscle, Smooth, VascularMagnetic Resonance SpectroscopyTime FactorsAorta, ThoracicExploratory BehaviorBrainMesenteric ArteriesBehavior TherapyCyclic GMPAnalysis of VarianceElectric StimulationNG-Nitroarginine Methyl EsterVasoconstrictor AgentsGastric FundusMyocardial ContractionMaze LearningDisease Models, AnimalMethylene BlueEconomics, BehavioralNitric Oxide SynthaseMagnetic Resonance ImagingIndomethacinSocial BehaviorCharybdotoxinPenisOxadiazolesArginineEnzyme InhibitorsRabbitsDiastolePhenylephrineApamin15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidAvoidance LearningTracheaStereotyped BehaviorPotassium ChlorideNeuronsVasoconstrictionCalciumBradykininAortaSerotoninGuanylate CyclaseAnxietyBehavioral Risk Factor Surveillance SystemDogsChild Behavior DisordersGuinea PigsNitric Oxide DonorsCocaineQuinoxalinesPsychomotor PerformanceEsophageal Sphincter, LowerStress, PsychologicalMuscle TonusCoronary VesselsNorepinephrineMice, Inbred C57BLSwineIsoproterenolInhibition (Psychology)SwimmingRats, WistarVasoactive Intestinal PeptideLocomotionArteriesConditioning, OperantConditioning (Psychology)Cognitive TherapyEsophagogastric JunctionRewardLearningMemoryDopamineFeeding BehaviorRats, Long-Evans