Fig. 5.

Activation of D2 receptors has no effect on activation and inactivation curves of Na⁺ currents. A Activation curves of Na⁺ currents before and after quinpirole (10 µmol/L) application. Normalized points are fitted with a Boltzmann function (n = 12). B Representative Na⁺ currents in an RGC evoked when the cells were first hyperpolarized to different potentials from a holding potential of −70 mV and then depolarized to −10 mV before and after application of quinpirole (10 µmol/L). C Inactivation curves of Na⁺ currents before and after application of quinpirole. Normalized points are fitted with a Boltzmann function (n = 12).