Implementing Brain-Like Fear Generalization and Emotional Arousal Associated With Memory

Emotion plays an important role in human life. In recent years, memristor-based emotion circuits have been proposed extensively, but few circuits simulate the neural circuity that generates specific emotions in the limbic system. In this article, a memristor-based circuit of brain-like fear generalization is proposed. It is described from two dimensions of perception and higher cognition, respectively, both of which are realized by simulating the limbic system of human brain. The main difference between these two dimensions lies in the circuit design of the hippocampus module. Moreover, the memory enhancement effect caused by fear is one of the reasons for the phenomenon of fear generalization. That is, high arousal of fear leads to enhanced memory. Herein, the memristor-based circuit associated with different emotional arousal and memory is designed. The simulation results in SPICE show that the circuit is able to implement the brain-like fear generalization and the emotional memory under different arousal. The circuit design of these neural networks may provide some references for the field of brain-like robots.