Pspice simulations are carried out based on the analog circuit of the coupled neurons to support our numerical results. It enables the estimation of the amount of energy released during the transition between the various electrical activities. For all the investigated phenomena, the Hamiltonian energy of the model is computed. In addition, the hidden coexistence of chaotic bursting with periodic spiking, chaotic spiking with period spiking, chaotic bursting with a resting pattern, and the coexistence of chaotic spiking with a resting pattern are also found for some sets of electrical synaptic coupling. The equilibria of the coupled neurons model are investigated, and their stabilities have revealed that, for some values of the electrical synaptic weight, the model under consideration can display either self-excited or hidden firing patterns. These coupled neurons involve 2D Hindmarsh–Rose (HR) and 2D FitzHugh–Nagumo (FN) neurons. In this paper, bidirectional-coupled neurons through an asymmetric electrical synapse are investigated.
