摘要
目的探讨腔隙性脑梗塞（ＬＩ）脑电图（ＥＥＧ）、脑电地形图（ＢＥＡＭ））改变的敏感性、变化特点以及对临床诊断的指导价值。方法对３０例ＬＩ行ＥＥＣ、ＢＥＡＭ及ＣＴ检查，并与梗塞组及正常组比较。结果ＬＩ组ＢＥＡＭ阳性率为７７％，高于ＣＴ（６３％）及ＥＥＧ（４２％）。主要改变为θ频带功率及δ／α、θ／α、δ＋θ／α＋β比值增高，α频带功率降低ＢＥＡＭ异常主要位于额区或顶、中央区。与对照组比较，ＬＩＢＥＡＭ改变具有一定特异性。结论ＢＥＡＭ是诊断ＬＩ较敏感的，并有一定定侧定位作用的监测手段。
Objectives To explore the sensitivity,changing characteristics of EEG and BEAM of lacunar infarction (LI),and their guiding value in clinial diagnosis. Methods Thirty cases of LI were examined by EEC,BEAM and CT,and compared with the cerebral infarction control group and mormal group. Results The positivity rate of BEAM was 77%,which was higher than those of CT scan (63%) and EEC(42%)in LI group.The main changes were the increase of the theta-wave range power and the ratio of δ/α,θ/α and δ+θ/α+β,and the decrease of the alpha-wave range power. The abnormality of BEAM took place mainly in the front, partial-central areas. By comparison with the normal centrol and ceredral infarction control, the special abnormality of BEAM in LI was found. Conclusions BEAM is a sensitive method to diagnose LI and a monitoring means to determine the location of LI.
