The experiment found that when mice were suddenly exposed to loud sound (fear), specific cells in the brain amygdala of mice were more active, and a special fear protein in the brain would increase. The content of this fear protein lies in a substance called glual. Mice lacking glual would maintain the fear memory related to loud sound, while other mice would not. 
There is a big gap between mouse and human nervous system, so it is difficult to apply the results of mouse experiment to human
 the experiment concluded that glual was developed These drugs can help people delete bad memories such as pain or fear, leaving only happy times.