Average spiking frequency and average coefficient of variation for different values of noise intensity for fixed external forcing current , feedback gain coefficient k=0.5, autaptic conductance g=0.1, delay time τ =10.0 ms and field coupling intensity g₀ =1.0, where (a) average spiking frequency and (b) average coefficient of variation. Average spiking frequency and average coefficient of variation are calculated from t = 5000 ms to t = 10000 ms when autapses are activated at t = 120 ms and electromagnetic disturbances are triggered at t = 500 ms.