Fig. 5

Action potential-evoked Ca²⁺ influx. a A representative experiment showing the averaged Ca²⁺ response (n = 9 cells) to Ca²⁺-free solution, 0.3 μM TTX, and increasing concentrations of nimodipine in the presence of TTX. b Statistics showing the percent block by TTX and increasing concentrations of nimodipine in TTX of basal Ca²⁺ influx as determined by Ca²⁺-free (0-Ca²⁺) solution (n = 121 cells). c A representative experiment showing the averaged Ca²⁺ response (n = 8 cells) to 0.3 μM TTX in the absence and then presence of 2 μM nimodipine. *** P < 0.001