VibrissaeSomatosensory CortexNeural PathwaysNerve NetVisual CortexThalamusCerebral CortexNeocortexBrain MappingModels, NeurologicalNeuronsCatsAction PotentialsRats, WistarChromatography, AffinityChromatography, High Pressure LiquidChromatographyChromatography, Ion ExchangeChromatography, GelMolecular WeightElectrophoresis, Polyacrylamide GelChromatography, GasChromatography, LiquidCapillary ElectrochromatographySepharoseChromatography, DEAE-CelluloseMolecular Sequence DataHydrogen-Ion ConcentrationSilicon DioxideKineticsChromatography, AgaroseAmino AcidsChemical FractionationSpectrophotometry, UltravioletAmino Acid Sequence