论文部分内容阅读
目的：探讨正常老年人视频脑电图的特点及异常发生率。方法将120例老年人按年龄分为A、B、C 3组。A组57例，年龄为60~69岁；B组42例，年龄为70~79岁；C组21例，年龄为80岁以上。采用χ2检验、秩和检验为统计学方法，统计各组老年人视频脑电图的异常率、α波特点、慢波特点及睡眠期特征性睡眠波的特点。结果视频脑电图的总异常率为42.5%，且80岁以上老年人视频脑电图的异常率尤其高（76.2%）。老年人α波的频率、波幅、反应性及α波指数均随着年龄的增加而减少。θ慢波随年龄增加而增多，80岁以上老年人异常的额区θ波出现率增多尤其明显。睡眠各周期的标志性睡眠波在老年人逐渐减少；睡眠纺锤波、顶尖波各年龄组之间无显著统计学差异。枕区一过性正相尖波随年龄增加而减少，80岁以上老年人未发现枕区一过性正相尖波。结论老年人的脑电图有异常率增加、反应性变差、α波变慢、波幅下降，α指数下降等特点，并且额区慢波增多，睡眠周期越来越不明显，典型睡眠波减少。“,”Objective To investigate the Video?Electroencephalography(VEEG)characteristics and abnormal rate among healthy elderly. Meth?ods According to the age,120 healthy elders were divided into groups A,B,and C. Group A has 57 subjects,aged 60?69 years old;group B has 42 people,aged 70?79 years;group C has 21 individuals,aged≥80 years. Chi square and Rank sum test were used to calculate abnormal rate of VEEG. Additionally,characteristics of alpha、slow wave and Iconic sleep wave were analyzed. Result The total abnormal rate of VEEG was 42.5%, and it was particularly high(76.2%)among elderly over 80s. Frequency,amplitude,reactivity of Alpha wave and alpha index decreased as age in?creased. Theta slow wave increased as age increased,abnormal frontal area theta showed an increase among elderly over 80 s. Each sleep cycle iconic sleep wave was gradually decreased in the elderly. No statistical difference was found about sleep spindles and vertex sharp among different groups . Positive occipital sharp transients of sleep(POSTS)decreased as age increased. There was no POSTS among elderly over 80 s. Conclusion Our re?sults showed that abnormal rate is increased in the elderly,while reactivity variation,slow alpha frequency,alpha amplitude,alpha index are de?creased. In addition,the slow waves in frontal area is increased,. sleep cycles becomes less distinct,and the typical wave are decreased.