Parasympathetic Nervous SystemAutonomic Nervous SystemAtropineVagus NerveAcetylcholineHeart RateMuscarinic AntagonistsSympathetic Nervous SystemHeartBlood PressureCentral Nervous SystemReceptors, NicotinicReceptors, CholinergicNervous Systemalpha7 Nicotinic Acetylcholine ReceptorBungarotoxinsTorpedoCentral Nervous System DiseasesVesicular Acetylcholine Transport ProteinsPeripheral Nervous SystemReceptors, MuscarinicNicotinic AntagonistsNicotinic AgonistsEnteric Nervous SystemNeuronsCentral Nervous System NeoplasmsBrainElectric Organ