Figure 2.

Effects of Co²⁺-substituted Ca²⁺-free solution on paeonol (500 μmol/L)-elicited action potential bursts in the RP4 neuron. A1 and A2 were recorded from one neuron, while B1 and B2 were recorded from another. A1: Spontaneous action potentials recorded from an RP4 neuron in normal physiological solution. A2: The potentials at 30 min after perfusion with Co²⁺-substituted Ca²⁺-free solution. B1: Spontaneous action potentials recorded from an RP4 neuron in normal physiological solution. B2: Membrane potentials recorded at 20 min after perfusion with Co²⁺-substituted Ca²⁺-free solution containing paeonol (500 μmol/L).