Table 1 Parameter values for full model and singular limit simulations and singularlimit analysis corresponding to Figure 3

$g_{NaP}=0.25$

$V_{Na}=50$

${\theta }_h=-48$

${\sigma }_h=3$

${\tau }_{a,h}=9.5$

$b_{12}=0.4$

ϵ = 0.01

$g_{Kdr}=0.25$

$V_K=-85$

${\theta }_n=-30$

${\sigma }_n=-4$

${\tau }_{a,2}=30$

$b_{13}=0.4$

$C=1\text{ pF}$

$g_{ad}=0.5$

${\theta }_m=-36$

${\sigma }_m=-{10}^{-1}$

${\tau }_{a,3}=45$

$b_{21}=0.2$

$d_1=0.21$

$g_L=0.14$

$V_L=-60$

${\theta }_{m_p}=-50$

${\sigma }_{m_p}=-{10}^{-1}$

${\tau }_{b,h}=-4.5$

$b_{23}=0.24$

$d_2=0.73$

$g_I=3.0$

$V_I=-75$

${\theta }_h^{\tau }=-48$

${\sigma }_h^{\tau }=-{10}^{-2}$

${\tau }_{b,2}=-10$

$b_{31}=0.3$

$d_3=1.4$

$g_E=0.5$

$V_E=0$

${\theta }_2^{\tau }=0$

${\sigma }_2^{\tau }={10}^{-1}$

${\tau }_{b,3}=-32.3$

$b_{32}=0.25$

${\theta }_I=-32$

${\theta }_3^{\tau }=0$

${\sigma }_3^{\tau }={10}^{-1}$

${\sigma }_I=-{10}^{-1}$

Singular limit parameter values

${\sigma }_L=\frac{1}{950}$

${\sigma }_R=\frac{1}{500}$

${\lambda }_L=\frac{1}{2\text{,}000}$

${\lambda }_R=\frac{1}{2\text{,}000}$

${\mu }_L=\frac{1}{1\text{,}270}$

${\mu }_R=\frac{1}{1\text{,}270}$