1992～1994年，我们对26例流行性腮腺炎并脑炎病人进行脑电图和脑脊液常规检查，现报告如下。临床资料：病人年龄最小3岁，最大12岁；均有流行性腮腺炎接触史，腮腺和颌下腺、舌下腺肿胀史，发热、头痛、频繁呕吐、嗜睡或脑膜刺激征阳性，脑脊液检查阳性。其中脑电图异常22例； From 1992 to 1994, we conducted routine electroencephalogram and cerebrospinal fluid tests on 26 patients with mumps and encephalitis, and are reported as follows. Clinical data: The patient is the youngest 3 years old, the oldest is 12 years old. All have history of mumps contact, history of parotid and submandibular gland, sublingual gland swelling, fever, headache, frequent vomiting, drowsiness or meningeal irritation, positive cerebrospinal fluid examination. EEG abnormalities in which 22 cases;