Fig. 8.

Coefficient of variation $\mathrm{CV}$ against noise amplitude $\sigma$ for parameter combinations of the inhibitory chemical autapse $({\kappa }_{\mathrm{c},\mathrm{inh}}^a,{\tau }_{\mathrm{c},\mathrm{inh}}^a)$ in a single isolated ML neuron. We observe that variations in these parameters significantly affect the degree of SISR by shifting the entire $\mathrm{CV}$ curve to higher values and by shrinking, on both ends, the interval of the noise amplitude in which this degree remains relatively high. Longer autaptic time delays enhance SISR, while stronger autaptic couplings destroy SISR. $v_l=1.515<v_{\mathbb{H}}$, $\epsilon =0.0005$