The amygdala is an important part of the human brain that helps control individual feelings. It is connected to emotions, fear, and memory, and works closely with other areas of the brain. Techniques like transcranial electrical stimulation, which includes direct current stimulation, and transcranial alternating of the current stimulation change how the human brain works and influence behavior when electrical currents are applied. Most of the information about these electrical fields comes from computer models. Surprisingly, there have only been a few studies on the human brain that looked at the effects of directly stimulating the amygdala. This includes how it affects human emotional and physical reactions. Cognitive sciences still do not fully understand the exact emotional and physical changes that occur with this form of stimulation. Understanding how stimulating the amygdala impacts emotions is imperative for contemporary ideas about how feelings work in the human brain. These ideas present different viewpoints on the effect of stimulation on emotions. Studies that use functional neuroimaging proffer concrete substantiation for the significant function of the amygdala in handling emotions. To explore these discussions, this paper offers systematic review methods incorporating a structured literature search to document the entire process, ensure reproducibility, and minimize bias. This was conducted to examine functional neuroimaging research that examines how the human brain reacts to emotional representations that activate the amygdala. Our analysis specifically considered both the strength of the effects and the consistency of each activation, unlike past studies. Findings in this study suggest that the amygdala reacts to both positive and depressing emotionsthat demonstrate feelings. In conclusion, the results from this structured literature search and systematic review paper provide new insights into various theories and models discussed in contemporary research about how the human brain processes emotions.