biocytin and tetrodotoxin

Topics: 2-Amino-5-phosphonovalerate; 6-Cyano-7-nitroquinoxaline-2,3-dione; Animals; Baclofen; Bicuculline; Cerebellar Nuclei; Cerebral Cortex; Electrophysiology; GABA Agonists; gamma-Aminobutyric Acid; In Vitro Techniques; Lysine; Muscimol; Neural Pathways; Purkinje Cells; Rats; Rats, Wistar; Receptors, GABA-A; Receptors, GABA-B; Synaptic Transmission; Tetrodotoxin; Vestibular Nucleus, Lateral

Topics: Action Potentials; Animals; In Vitro Techniques; Kinetics; Lysine; Motor Cortex; Neurons; Pyramidal Cells; Rats; Rats, Wistar; Somatosensory Cortex; Tetraethylammonium Compounds; Tetrodotoxin

Topics: Action Potentials; Animals; Calcium; Calcium Channels; Electric Stimulation; Electrophysiology; In Vitro Techniques; Lysine; Membrane Potentials; Neurons; Nickel; Spinal Cord; Synaptic Transmission; Tetrodotoxin; Turtles

Topics: Acetylcholine; Action Potentials; Animals; Electrophysiology; Fluorescent Dyes; Ganglia; Guinea Pigs; In Vitro Techniques; Lysine; Male; Membrane Potentials; Microelectrodes; Muscle, Smooth; Neurons; Patch-Clamp Techniques; Synapses; Tetrodotoxin; Urinary Bladder

Topics: Action Potentials; Animals; Axons; Cats; Dendrites; Electrophysiology; Female; In Vitro Techniques; Interneurons; Lysine; Male; Membrane Potentials; Microscopy, Electron; Motor Cortex; Neurons; Patch-Clamp Techniques; Pyramidal Cells; Tetrodotoxin

Topics: Animals; Biomarkers; Lysine; Membrane Potentials; Neurons; Rats; Receptors, Neurokinin-1; Spinal Cord; Substance P; Tetrodotoxin

Topics: Action Potentials; Animals; Chickens; Cloaca; Electrophysiology; Excitatory Postsynaptic Potentials; Female; Ganglia, Autonomic; Gastrointestinal Motility; In Vitro Techniques; Jejunum; Lysine; Male; Microelectrodes; Tetrodotoxin

Topics: Afferent Pathways; Animals; Animals, Newborn; Cell Differentiation; Dendrites; Dentate Gyrus; Entorhinal Cortex; Golgi Apparatus; Lysine; Models, Neurological; Nerve Fibers; Neurons; Organ Culture Techniques; Rats; Rats, Sprague-Dawley; Tetrodotoxin

Topics: 2-Amino-5-phosphonovalerate; 6-Cyano-7-nitroquinoxaline-2,3-dione; Afferent Pathways; Aging; Animals; Animals, Newborn; Benzodiazepines; Bicuculline; Cations, Divalent; Electric Stimulation; Embryonic and Fetal Development; Excitatory Amino Acid Antagonists; Excitatory Postsynaptic Potentials; Fluorescent Dyes; Hippocampus; Hypoxia; Lysine; Pyramidal Cells; Quinoxalines; Rats; Rats, Wistar; Receptors, AMPA; Synapses; Tetrodotoxin

Topics: Animals; Auditory Pathways; Axons; Brain Stem; Evoked Potentials; gamma-Aminobutyric Acid; Glycine; Lysine; Nerve Regeneration; Neurons; Olivary Nucleus; Organ Culture Techniques; Patch-Clamp Techniques; Rats; Rats, Sprague-Dawley; Reaction Time; Strychnine; Synapses; Tetrodotoxin

Topics: Action Potentials; Animals; Calcium Signaling; Cats; Cesium; Computer Simulation; Electric Stimulation; Excitatory Postsynaptic Potentials; Geniculate Bodies; In Vitro Techniques; Lysine; Models, Neurological; Neurons; Potassium; Reaction Time; Sensory Thresholds; Tetrodotoxin; Thalamus

Topics: Action Potentials; Animals; Axons; Calcium; Calcium Channels; Electric Stimulation; Excitatory Postsynaptic Potentials; Hippocampus; In Vitro Techniques; Lysine; Male; Neuronal Plasticity; Neurotransmitter Agents; Presynaptic Terminals; Pyramidal Cells; Rats; Rats, Wistar; Ryanodine; Synaptophysin; Tetrodotoxin

Topics: Action Potentials; Animals; Apamin; Calcium; Carbachol; Cholinergic Agents; Electric Stimulation; Gene Expression; Hippocampus; Immunoenzyme Techniques; In Situ Hybridization; Interneurons; Ion Channel Gating; Ion Transport; Lysine; Membrane Potentials; Nerve Tissue Proteins; Patch-Clamp Techniques; Potassium; Potassium Channels; Potassium Channels, Calcium-Activated; Pyramidal Cells; Rats; Rats, Wistar; Small-Conductance Calcium-Activated Potassium Channels; Tetraethylammonium; Tetrodotoxin

Topics: Action Potentials; Animals; Calcium; Cell Membrane; Chelating Agents; Dose-Response Relationship, Drug; Egtazic Acid; Enzyme Activators; Extracellular Space; Gap Junctions; Hippocampus; In Vitro Techniques; Lysine; Nickel; Phenytoin; Phorbol Esters; Potassium Channel Blockers; Potassium Channels; Protein Kinase C; Pyramidal Cells; Rats; Sensory Thresholds; Sodium; Sodium Channel Blockers; Sodium Channels; Tetrodotoxin

Topics: Animals; Animals, Newborn; Astrocytes; Biological Clocks; Calcium Channel Blockers; Calcium Signaling; Central Nervous System; Enzyme Inhibitors; Excitatory Amino Acid Antagonists; GABA Antagonists; Immunohistochemistry; Isoquinolines; Lysine; Magnesium; Membrane Potentials; Neurons; Patch-Clamp Techniques; Rats; Receptors, N-Methyl-D-Aspartate; Synaptic Transmission; Tetrodotoxin; Thalamus; Vimentin

Topics: Action Potentials; Animals; Calcium; Calcium Channel Blockers; Calcium Channels; Calcium Signaling; Hormone Antagonists; Lysine; Neostriatum; Neural Inhibition; Neurons; Organ Culture Techniques; Potassium Channel Blockers; Rats; Rats, Wistar; Somatostatin; Tetraethylammonium; Tetrodotoxin

Topics: Animals; Axons; Dendrites; Dizocilpine Maleate; Electric Stimulation; Excitatory Amino Acid Antagonists; Excitatory Postsynaptic Potentials; GABA Antagonists; Gyrus Cinguli; In Vitro Techniques; Interneurons; Lysine; Male; Membrane Potentials; Neural Inhibition; Neurotoxicity Syndromes; Parietal Lobe; Patch-Clamp Techniques; Pyramidal Cells; Rats; Rats, Sprague-Dawley; Receptors, N-Methyl-D-Aspartate; Tetrodotoxin

Topics: Action Potentials; alpha7 Nicotinic Acetylcholine Receptor; Animals; Animals, Newborn; Cholinergic Agonists; Dimethylphenylpiperazinium Iodide; Excitatory Postsynaptic Potentials; Hypoglossal Nerve; Lysine; Medulla Oblongata; Motor Neurons; Neural Pathways; Nicotinic Agonists; Rats; Rats, Sprague-Dawley; Receptors, Nicotinic; Respiratory Physiological Phenomena; Sleep; Sleep Apnea, Obstructive; Synaptic Transmission; Tetrodotoxin

Topics: Alanine; Anesthetics, Local; Animals; Animals, Newborn; Aspartic Acid; Calcium-Calmodulin-Dependent Protein Kinase Type 2; Calcium-Calmodulin-Dependent Protein Kinases; Cell Count; Cell Surface Extensions; Cerebral Cortex; Dizocilpine Maleate; Drug Interactions; Excitatory Amino Acid Antagonists; Excitatory Postsynaptic Potentials; Fluorescent Dyes; Gene Expression Regulation, Enzymologic; Green Fluorescent Proteins; Immunohistochemistry; Luminescent Proteins; Lysine; Mutation; Nerve Tissue Proteins; Neuronal Plasticity; Neurons; Organ Culture Techniques; Pyridinium Compounds; Quaternary Ammonium Compounds; Rats; Rats, Long-Evans; Synapses; Synapsins; Synaptic Transmission; Tetrodotoxin; Threonine; Transfection; Valine

Topics: Anesthetics, Local; Animals; Arcuate Nucleus of Hypothalamus; Electric Conductivity; Electrophysiology; Galanin; Gene Expression; In Situ Hybridization; In Vitro Techniques; Lysine; Male; Membrane Potentials; Neural Inhibition; Neurons; Rats; Rats, Wistar; Receptors, Galanin; Receptors, Neuropeptide; RNA, Messenger; Substance P; Tetrodotoxin

Topics: 6-Cyano-7-nitroquinoxaline-2,3-dione; Anesthetics, Local; Animals; Animals, Newborn; Axons; Disease Models, Animal; Epilepsy; Excitatory Amino Acid Antagonists; Excitatory Postsynaptic Potentials; Hippocampus; Immunoblotting; Immunohistochemistry; In Vitro Techniques; Lysine; Membrane Potentials; Microscopy, Confocal; Microscopy, Electron; Nerve Net; Patch-Clamp Techniques; Piperidines; Pyramidal Cells; Rats; Receptors, AMPA; Receptors, N-Methyl-D-Aspartate; Synapses; Synaptophysin; Tetrodotoxin; Time Factors

Topics: Anesthetics, Local; Animals; Animals, Newborn; Axons; Brain Stem; Calcium; Electric Conductivity; Electric Stimulation; In Vitro Techniques; Interneurons; Lysine; Membrane Potentials; Motor Neurons; Neural Conduction; Patch-Clamp Techniques; Rats; Rats, Wistar; Tetrodotoxin; Trigeminal Nuclei

Topics: Anesthetics, Local; Angiotensin II; Animals; Blood Pressure; Cadmium; Diagnostic Imaging; Dose-Response Relationship, Drug; Drug Interactions; Electric Impedance; Glutamic Acid; In Vitro Techniques; Lysine; Male; Medulla Oblongata; Membrane Potentials; Neural Conduction; Neurons; Paraventricular Hypothalamic Nucleus; Patch-Clamp Techniques; Rats; Rats, Sprague-Dawley; Tetrodotoxin; Time Factors; Vasoconstrictor Agents

Topics: Action Potentials; Animals; Animals, Newborn; Cells, Cultured; Diagnostic Imaging; Disks Large Homolog 4 Protein; Electric Stimulation; Homeostasis; Immunohistochemistry; Intracellular Signaling Peptides and Proteins; Lysine; Membrane Proteins; Neocortex; Neuronal Plasticity; Neurons; Patch-Clamp Techniques; Potassium Chloride; Pyridinium Compounds; Quaternary Ammonium Compounds; Rats; Rats, Long-Evans; Receptors, AMPA; Synapses; Synapsins; tau Proteins; Tetrodotoxin; Time Factors; Transfection

Topics: 6-Cyano-7-nitroquinoxaline-2,3-dione; Action Potentials; Animals; Electric Stimulation; Excitatory Amino Acid Antagonists; Excitatory Postsynaptic Potentials; In Vitro Techniques; Lysine; Models, Neurological; Nerve Net; Neurons; Rats; Rats, Sprague-Dawley; Reaction Time; Stilbamidines; Substance P; Substantia Gelatinosa; Synaptic Transmission; Tetrodotoxin

Topics: 2-Amino-5-phosphonovalerate; Action Potentials; Animals; Evoked Potentials; Excitatory Amino Acid Antagonists; GABA Antagonists; gamma-Aminobutyric Acid; Globus Pallidus; Lysine; Male; Mice; Mice, Inbred C57BL; Neural Pathways; Neurons; Parkinson Disease; Patch-Clamp Techniques; Picrotoxin; Pyridazines; Quinoxalines; Receptors, GABA-A; Receptors, GABA-B; Subthalamic Nucleus; Synapses; Tetrodotoxin

Topics: Action Potentials; Age Factors; Anesthetics, Local; Animals; Animals, Newborn; Bicuculline; Drug Interactions; Electric Stimulation; Excitatory Amino Acid Antagonists; Excitatory Postsynaptic Potentials; GABA Antagonists; In Vitro Techniques; Lysine; Membrane Potentials; Neural Inhibition; Neural Pathways; Neurons; Pons; Quinoxalines; Rats; Reaction Time; Tegmentum Mesencephali; Tetrodotoxin

Topics: 2-Amino-5-phosphonovalerate; Analysis of Variance; Anesthetics, Local; Animals; Animals, Newborn; Brain Injuries; Brain Mapping; Cell Count; Electric Stimulation; Excitatory Amino Acid Antagonists; Excitatory Postsynaptic Potentials; Glutamates; In Vitro Techniques; Lysine; Microscopy, Confocal; Patch-Clamp Techniques; Photic Stimulation; Pyramidal Cells; Rats; Rats, Sprague-Dawley; Somatosensory Cortex; Synaptic Transmission; Tetrodotoxin

Topics: 4-Aminopyridine; Action Potentials; Animals; Animals, Newborn; Brain Stem; Corticotropin-Releasing Hormone; Dose-Response Relationship, Radiation; Electric Stimulation; Female; Ganglia, Parasympathetic; Immunohistochemistry; In Vitro Techniques; Lysine; Male; Neurons; Nickel; Patch-Clamp Techniques; Potassium Channel Blockers; Rats; Rats, Wistar; Sodium Channel Blockers; Tetrodotoxin; Urocortins

Topics: 2-Amino-5-phosphonovalerate; 6-Cyano-7-nitroquinoxaline-2,3-dione; Action Potentials; Animals; Apamin; Bicuculline; Cesium; Chick Embryo; Chlorides; Dose-Response Relationship, Radiation; Drug Combinations; Electric Stimulation; Excitatory Amino Acid Antagonists; Excitatory Postsynaptic Potentials; GABA Antagonists; In Vitro Techniques; Lysine; Neurons; Sodium Channel Blockers; Strychnine; Tetrodotoxin; Vestibular Nuclei

Topics: Action Potentials; Animals; Cholera Toxin; Electrophysiology; Enkephalin, Ala(2)-MePhe(4)-Gly(5)-; Finches; Lysine; Male; Neurons; Patch-Clamp Techniques; Quinpirole; Receptors, Dopamine D2; Receptors, Opioid, mu; Substantia Nigra; Tetrodotoxin; Tyrosine 3-Monooxygenase; Ventral Tegmental Area

Topics: Amygdala; Anesthetics, Local; Animals; Brain Mapping; Dose-Response Relationship, Radiation; Electric Stimulation; Entorhinal Cortex; Evoked Potentials; Fluorescent Dyes; Guinea Pigs; In Vitro Techniques; Lysine; Models, Anatomic; Olfactory Pathways; Pyridinium Compounds; Tetrodotoxin; Time Factors

Topics: Anesthetics, Local; Animals; Bicuculline; Disease Models, Animal; Electric Stimulation; Epilepsy, Temporal Lobe; GABA Antagonists; In Vitro Techniques; Inhibitory Postsynaptic Potentials; Lysine; Male; Midline Thalamic Nuclei; Neurons; Rats; Rats, Sprague-Dawley; Receptors, GABA-A; Tetrodotoxin

Topics: Action Potentials; Anesthetics, Local; Animals; gamma-Aminobutyric Acid; Hippocampus; In Vitro Techniques; Inhibitory Postsynaptic Potentials; Interneurons; Lysine; Neural Inhibition; Oxytocin; Patch-Clamp Techniques; Pyramidal Cells; Rats; Rats, Sprague-Dawley; Receptors, Tachykinin; Substance P; Tachykinins; Tetrodotoxin

Topics: 2-Amino-5-phosphonovalerate; Action Potentials; Adrenergic Agents; Amygdala; Anesthetics, Local; Animals; Biophysical Phenomena; Dose-Response Relationship, Drug; Electric Conductivity; Electric Stimulation; Excitatory Amino Acid Antagonists; GABA Antagonists; gamma-Aminobutyric Acid; Glutamate Decarboxylase; Green Fluorescent Proteins; In Vitro Techniques; Lysine; Membrane Potentials; Mice; Mice, Inbred C57BL; Mice, Inbred ICR; Mice, Transgenic; Neurons; Norepinephrine; Patch-Clamp Techniques; Phosphinic Acids; Potassium; Propanolamines; Tetrodotoxin

Topics: Analysis of Variance; Animals; Calcium-Binding Proteins; Dendritic Spines; Dose-Response Relationship, Radiation; Ectodysplasins; Electric Stimulation; Electroencephalography; Excitatory Amino Acid Antagonists; Excitatory Postsynaptic Potentials; Green Fluorescent Proteins; Hippocampus; In Vitro Techniques; Inflammation; Inhibitory Postsynaptic Potentials; Lipopolysaccharides; Lysine; Male; Microfilament Proteins; Microscopy, Confocal; Neurogenesis; Neurons; Patch-Clamp Techniques; Quinoxalines; Rats; Rats, Sprague-Dawley; Seizures; Tetrodotoxin; Time Factors

Topics: Action Potentials; Analysis of Variance; Animals; Biophysical Phenomena; Cadmium; Calcium; Electric Stimulation; gamma-Aminobutyric Acid; In Vitro Techniques; Interneurons; Lysine; Odorants; Olfactory Bulb; Patch-Clamp Techniques; Periplaneta; Potassium Channel Blockers; Sodium; Sodium Channel Blockers; Tetraethylammonium; Tetrodotoxin

Topics: Anesthetics, Local; Animals; Biophysics; Electric Stimulation; Excitatory Amino Acid Antagonists; Excitatory Postsynaptic Potentials; GABA Antagonists; Hippocampus; In Vitro Techniques; Interneurons; Long-Term Potentiation; Lysine; Male; Neural Inhibition; Patch-Clamp Techniques; Phosphinic Acids; Picrotoxin; Propanolamines; Rats; Rats, Sprague-Dawley; Receptors, AMPA; Receptors, Kainic Acid; Tetrodotoxin

Topics: Animals; Biophysical Phenomena; Cadmium Chloride; Calcium; Calcium Channel Blockers; Electric Stimulation; Inhibitory Postsynaptic Potentials; Ion Channel Gating; Lysine; Membrane Potentials; Mushroom Bodies; Neurons; Odorants; Olfactory Pathways; Patch-Clamp Techniques; Periplaneta; Potassium Channel Blockers; Sodium Channel Blockers; Tetrodotoxin

Topics: Animals; Animals, Newborn; Brain-Derived Neurotrophic Factor; Cells, Cultured; CREB-Binding Protein; Enzyme-Linked Immunosorbent Assay; Excitatory Amino Acid Antagonists; Female; GABA Antagonists; gamma-Aminobutyric Acid; Green Fluorescent Proteins; Hippocampus; Lysine; Membrane Potentials; Mice; Mice, Knockout; Neurons; Patch-Clamp Techniques; Phosphinic Acids; Propanolamines; Quinoxalines; Receptors, GABA-B; Sodium Channel Blockers; Synapses; Tetrodotoxin; Valine

Topics: Acetylcholine; Animals; Animals, Newborn; Bungarotoxins; Cochlear Nucleus; Dose-Response Relationship, Drug; Imidazoles; In Vitro Techniques; Insecticides; Interneurons; Lysine; Membrane Potentials; Mice; Neonicotinoids; Nicotine; Nicotinic Agonists; Nicotinic Antagonists; Nitro Compounds; Patch-Clamp Techniques; Sodium Channel Blockers; Synapses; Tetrodotoxin; Tubocurarine

Topics: 6-Cyano-7-nitroquinoxaline-2,3-dione; Animals; Axons; Biophysics; Cerebellum; Dendrites; Dose-Response Relationship, Drug; Electric Fish; Electric Stimulation; Excitatory Amino Acid Agonists; Excitatory Amino Acid Antagonists; Excitatory Postsynaptic Potentials; In Vitro Techniques; Lysine; Membrane Potentials; Mice; N-Methylaspartate; Nerve Fibers; Patch-Clamp Techniques; Purkinje Cells; Sodium Channel Blockers; Tetrodotoxin

Topics: Action Potentials; Age Factors; Amino Acids; Analysis of Variance; Animals; Animals, Genetically Modified; Animals, Newborn; Calcium; Calcium Channel Blockers; Chelating Agents; Chi-Square Distribution; Egtazic Acid; Excitatory Amino Acid Antagonists; Flufenamic Acid; Glutamate Decarboxylase; Glutamic Acid; Green Fluorescent Proteins; In Vitro Techniques; Lysine; Male; Nerve Net; Neural Pathways; Neurons; omega-Conotoxin GVIA; Patch-Clamp Techniques; Periaqueductal Gray; Periodicity; Potassium Channel Blockers; Rats; Rats, Sprague-Dawley; Sodium Channel Blockers; Spinal Cord; Statistics, Nonparametric; Tetraethylammonium; Tetrodotoxin; Vesicular Glutamate Transport Protein 2

Topics: Animals; Electrophysiological Phenomena; gamma-Aminobutyric Acid; Interneurons; Lysine; Methoxyhydroxyphenylglycol; Mice; Neocortex; Nerve Net; Neurons; Patch-Clamp Techniques; Receptors, AMPA; Receptors, CXCR4; Recruitment, Neurophysiological; Tetrodotoxin

Topics: Age Factors; Animals; Animals, Newborn; Anticonvulsants; Caspase 3; Corpus Striatum; Electric Stimulation; Excitatory Postsynaptic Potentials; Female; In Vitro Techniques; Inhibitory Postsynaptic Potentials; Lysine; Maze Learning; Neurons; Patch-Clamp Techniques; Pregnancy; Rats, Sprague-Dawley; Sodium Channel Blockers; Synapses; Tetrodotoxin

Topics: 6-Cyano-7-nitroquinoxaline-2,3-dione; Animals; Animals, Newborn; Baclofen; Chick Embryo; Excitatory Amino Acid Antagonists; GABA Agents; In Vitro Techniques; Lysine; Microscopy, Confocal; Microtubule-Associated Proteins; Neurons; Neurotransmitter Agents; Patch-Clamp Techniques; Presynaptic Terminals; Receptors, GABA-B; Sodium Channel Blockers; Statistics, Nonparametric; Synaptic Potentials; Synaptotagmin I; Synaptotagmin II; Tetrodotoxin; Time Factors; Valine; Vestibular Diseases; Vestibular Nuclei

Topics: 6-Cyano-7-nitroquinoxaline-2,3-dione; Action Potentials; Adaptor Proteins, Signal Transducing; Age Factors; Animals; Animals, Newborn; Discs Large Homolog 1 Protein; Excitatory Amino Acid Antagonists; Excitatory Postsynaptic Potentials; GABA Antagonists; Glutamate Decarboxylase; In Vitro Techniques; Interneurons; Lysine; Membrane Proteins; Mice; Mice, Transgenic; Parvalbumins; Picrotoxin; Plant Lectins; Sodium Channel Blockers; Tetrodotoxin; Transduction, Genetic; Visual Cortex

Topics: 2-Amino-5-phosphonovalerate; 6-Cyano-7-nitroquinoxaline-2,3-dione; Age Factors; Animals; Animals, Newborn; Arcuate Nucleus of Hypothalamus; Excitatory Amino Acid Antagonists; Excitatory Postsynaptic Potentials; Female; gamma-Aminobutyric Acid; Inhibitory Postsynaptic Potentials; Lysine; Male; Mice; Mice, Inbred C57BL; Mice, Transgenic; Neurons; Neuropeptide Y; Sodium Channel Blockers; Synapses; Tetrodotoxin; Vesicular Inhibitory Amino Acid Transport Proteins

Topics: Action Potentials; Animals; Animals, Genetically Modified; Animals, Newborn; Basal Forebrain; Benzamides; Calcium Channel Blockers; Carbachol; Cholinergic Agents; Electric Stimulation; Glutamates; Luminescent Proteins; Lysine; Mice; Neurons; Patch-Clamp Techniques; Piperidines; Pyrimidines; Red Fluorescent Protein; Sodium Channel Blockers; Tetrodotoxin; Vesicular Glutamate Transport Protein 2

Topics: Animals; Axons; CA1 Region, Hippocampal; Electric Stimulation; In Vitro Techniques; Lysine; Male; Membrane Potentials; Mice; Mice, Inbred C57BL; Neurotransmitter Agents; Patch-Clamp Techniques; Pyramidal Cells; Sodium; Sodium Channel Blockers; Tetrodotoxin

Topics: Action Potentials; Animals; Basal Forebrain; Dimaprit; Dose-Response Relationship, Drug; Electric Stimulation; Female; GABAergic Neurons; gamma-Aminobutyric Acid; Histamine; Histamine Agonists; Lysine; Male; Patch-Clamp Techniques; Pyridines; Rats; Rats, Sprague-Dawley; Receptors, Histamine H1; Receptors, Histamine H2; Sodium Channel Blockers; Tetrodotoxin