Heres how this can happen: when a person senses danger (even if it doesnt turn out to be true danger), the brain quickly reacts by sending a signal to a small structure in the brain called the amygdala (pronounced: uh-mig-duh-luh).

• 这是这样发生的：当一个人觉得危险（即使事实上并不真的危险），大脑会迅速发应，向一个叫杏仁核的微小脑部组织发送信号。