Ganji S, Duncan M C, Frazier E
Department of Neurology, Louisiana State University School of Medicine, New Orleans 70112.
Clin Electroencephalogr. 1988 Jul;19(3):114-22. doi: 10.1177/155005948801900304.
An 8-year-old child developed acute mental confusion, and choreoathetosis without a preceding history of acute rheumatic fever. Serial EEGs showed focal suppression of sleep spindle activity over the right cerebral hemisphere along with high-amplitude polymorphic slow-wave complexes. CT scan studies on 4 occasions and MRI scan failed to show focal lesions corresponding to the clinical manifestations. Results of brainstem auditory evoked potential studies were normal. The short- and long-latency somatosensory evoked potential patterns were abnormal during the acute phase of illness as well as during the follow-up, when the patient was clinically intact. The persistent EEG and evoked potential abnormalities in the presence of clinical recovery from chorea raised questions as to the existence of a subclinical disease process.
一名8岁儿童出现急性精神错乱和舞蹈徐动症，之前并无急性风湿热病史。系列脑电图显示右大脑半球睡眠纺锤波活动局灶性抑制，伴有高波幅多形性慢波复合波。4次CT扫描研究及MRI扫描均未显示与临床表现相对应的局灶性病变。脑干听觉诱发电位研究结果正常。在疾病急性期以及随访期间（此时患者临床症状已恢复），短潜伏期和长潜伏期体感诱发电位模式均异常。舞蹈症临床症状恢复但脑电图和诱发电位持续异常，这引发了关于是否存在亚临床疾病过程的疑问。
