杏仁核, or the amygdala, is a small, almond-shaped cluster of nuclei located deep within the brain. It plays a crucial role in processing emotions, particularly fear and pleasure. The amygdala is involved in the formation of emotional memories and helps the body respond to threats. In addition to its emotional functions, the amygdala interacts with other brain regions, such as the hippocampus and prefrontal cortex, to regulate behavior and decision-making. Its activity can influence how we react to various situations, making it essential for understanding human emotions and social interactions.