Figure 8.

Activating I_Ca makes the overlap between I_SD and I_Na disappear and increases AP efficiency. (A) Spike train recorded in the model II neuron with p = 0.4. We extract four APs indicated by blue arrows to examine their underlying currents. (B) I_Na (red), I_K (blue), I_Ca (pink) and I_SD (green) underlying the 2nd, 8th, 40th, and 170th APs. $I_{\text{D}}=5\mu \mathrm{\text{A}}/\mathrm{\text{c}}{\mathrm{\text{m}}}^{\mathrm{\text{2}}}$ and $g_{\mathrm{\text{c}}}=0.3\mathrm{\text{mS}}/\mathrm{\text{c}}{\mathrm{\text{m}}}^{\mathrm{\text{2}}}$.