散发性脑炎为临床常见病和多发病，对该病的诊断在病毒学、血清学尚未普遍应用的基层医院，只能靠临床表现、实验室检验、脑电图改变并排除其它颅内疾患而确诊。散发性脑炎的脑电图异常率高、检查费用低、无损伤、重复性好、易普及，而且其改变与临床表现和预后有一定关系，放 Sporadic encephalitis is a common clinical disease and frequently-occurring disease, the diagnosis of the disease in virology, serology has not yet been widely used in primary hospitals, only by clinical manifestations, laboratory tests, EEG changes and rule out other intracranial diseases And confirmed. Sporadic encephalitis EEG abnormal rate, check the low cost, no damage, good repeatability, easy to popularize, and its changes and clinical manifestations and prognosis have some relationship, put