厌恶情绪与自杀行为的关系

The relationship between disgust and suicidal behavior

自杀导致人类死亡的人数与日俱增,然而自杀的心理机制却并不清楚。最近研究发现,厌恶情绪是导致自杀的主要情绪因素,个体因为自身厌恶而走向自杀。厌恶情绪是一种对自己和他人排泄物等反感的基本情绪,促进个体远离毒性和疾病,从而产生“免疫行为”。许多心理问题来自于对周围人或事物的厌恶,有自杀行为的个体对自身极其厌恶,说明他们的厌恶情绪出现了问题。如同躯体免疫攻击自身一样,自身厌恶是自杀意念的关键因素,早年创伤是其根源,生活压力和精神疾病也参与厌恶诱发自杀意念。厌恶诱发自杀意念的神经基础与HPA轴和五羟色胺系统有关。未来研究可利用神经影像和电生理等神经科学技术,检验自杀行为的神经机制,探讨厌恶情绪影响自杀行为的心理和神经机制。

The death number caused by suicide is increasing, but the psychological mechanism of suicide is not clear. Recent studies have found that disgust might be the major emotional factor leading to suicide, or the reason for people to commit suicide is due to self-disgust. Disgust is a kind of basic emotion that is induced by excreta from oneself or other people. Disgust works to keep the individual away from toxicity and disease, which can be called "immune behavior". Recently, it is found that many psychological problems are resulted from the disgust reactions to surrounding people or environment. Some studies have shown that individuals who commit suicide are very disgustful for themselves, indicating that their disgust emotion is problematic. Just as somatic autoimmunity attacks itself, disgust might lead to attacking behaviors against oneself or suicide. Self-disgust is the key factor of suicidal ideation, and early trauma is the root cause. Life stress and mental illness are involved in that disgust induced suicidal ideation. The neural basis of suicide induced by disgust is related to HPA axis and serotonin system. Future studies might apply neuroscience technologies, such as neuroimaging and electrophysiology, to examine the neural mechanism of suicidal behavior, and to explore the psychological and neural mechanisms of disgust affecting suicidal behaviors.