模式匹配肌电图对神经原性损害的诊断作用

目的：证实模式匹配肌电图的运动单位电位（ＭＵＰ）不同参数的临床神经生理意义以及不同运动单位募集对临床诊断的影响。方法：胫前肌、拇短展肌、股四头肌正常组５２５６个ＭＵＰ，神经病组１９１３个ＭＵＰ通过模式匹配方法记录。对轻谨度用力肌肉收缩记录的ＭＵＰ分别进行判别分析和显性检验。结果：单一参数中，面积的诊断作用最敏感，可判别７３．２％￣７９．６％的神经病变组ＭＵＰ。时限的诊断敏感性低于面积和波幅。大小

DIAGNOSTIC YIELD OF MOTOR UNIT POTENTIAL PARAMETERS OF TEMPLATE MATCHING ELECTROMYOGRAPHY IN NEUROGENIC LESIONS

Objective:To determine the role of motor unit potential(MUP) parameters of template matching electromyography in diagnosis of neurogenic lesions.Methods:Of 7 169 MUP,5 256 from normal group and 1 913 from neurogenic group were recorded in the muscles of tibialis anterior,vastus medialis and abductor pollicis brevis.The MUP registered under slight and moderate muscle contractions were analyzed with discriminate and significance analysis.Results:As a single parameter,the area produced a better result in discriminating neurogenic MUP from control,with 73 2%-79 6% of MUP from neurogenic muscles being judged as abnormal and 14 7%-15 7% MUP from normal muscles being misclassified.In discriminating neurogenic MUP,the size index was as efficient as the area,but the duration was less sensitive than the area and amplitude.In the recruitment test of tibialis anterior and vastus medialis,all the parameters of the MUP from slight muscle contraction were more sensitive than those from moderate muscle contraction.Conclusion:In diagnosis of neurogenic MUP,the area, size index,amplitude, and duration appeared to be the most important parameters and the slight muscle contraction in the motor unit recruitment delivered a better diagnostic yield.