机械性窒息死亡者常可出现排便（精）现象。对这一征象的传统解释是：窒息过程中发生惊厥，致平滑肌收缩、痉挛，故常有大小便失禁，精液排出[1]。笔者认为平滑肌挛缩不是机械性窒息时排便（精）现象的唯一和主要的机制，而脊髓反射的自主释放是其主要机制。1排便（精版射的生 Mechanical suffocation often appear defecation (fine) phenomenon. The traditional interpretation of this phenomenon is: convulsions during asphyxia, smooth muscle contraction, spasm, so often incontinence, semen discharge [1]. I believe that smooth muscle contracture is not the only mechanism of defecation (fine) phenomenon of mechanical asphyxia, while the autonomous release of spinal reflex is its main mechanism. 1 defecation (fine version of the students shot