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分析160例经手术和病理证实的脑膜瘤脑电图。颅盖部脑膜瘤脑电图特征是在正常背景活动基础上,出现局灶散在δ波或伴有痫灶(37.9％),其局灶异常随肿瘤缓慢生长而有一个经“正常”、轻微到明显的过程。定位率85.2％。颅底部与脑室内脑膜瘤脑电图亦在正常背景活动基础上,除嗅沟、蝶骨脊及侧脑室部的局灶散在δ波可反映至相应的脑叶外,余均符合中线深部肿瘤的特点,但少数(10.7％)累及中线结构表现为弥漫性异常.大多数(89.3％)为“正常”。定位率仅36.9％。因其特征与恶性胶质瘤脑电图(多在弥漫性异常背景活动基础上,局灶性多形性δ波突出)宛然有别,故对其良性肿瘤性质的判断也有较大价值。
Analysis of 160 cases of meningioma confirmed by surgery and pathology EEG. Cephalosphere meningioma EEG is characterized by the normal background activity, based on the presence of scattered squamous wave δ or associated with epileptogenic (37.9%), the focal abnormalities with the slow growth of the tumor has a “normal”, slight To the obvious process. Positioning rate of 85.2%. Base of skull and intraventricular meningioma EEG also based on the normal background activity, in addition to the olfactory groove, sphenoid ridge and lateral ventricle of the focal scattered δ wave can be reflected to the corresponding lobar, the remaining line with the midline deep tumors , But a minority (10.7%) had diffuse abnormalities involving the midline structures, while most (89.3%) were “normal”. Positioning rate of only 36.9%. Because of its characteristics and glioblastoma EEG (mostly diffuse abnormal background activity, based on the focal pleomorphic δ wave prominent) are different, so the judge of the nature of its benign tumors have great value.