肝脏对各种物质的代谢有重要作用,肝受损害时则引起脑代谢的异常而表现出各种中枢神经系统症状.通常由于肝损害而出现意识障碍和精神症状时,则称之为“肝性脑病”.不论是什么原因,只要肝脏损害到一定的严重程度就会出现各种各样的精神症状,最严重的就是昏迷(肝性昏迷).肝性脑病的精神症状根据其诱因的不同,可分以下两类. The liver plays an important role in the metabolism of various substances, and when the liver is impaired, it causes abnormalities in brain metabolism and presents with various central nervous system symptoms. Usually, when disturbance of consciousness and psychiatric symptoms occur due to liver damage, it is called “ Hepatic encephalopathy ”.Whatever the reason, as long as the liver damage to a certain degree of severity there will be a variety of psychiatric symptoms, the most serious is coma (hepatic coma) .The psychiatric symptoms of hepatic encephalopathy according to its incentive Different, can be divided into the following two categories.