Sonoo M, Stålberg E
Department of Clinical Neurophysiology, University Hospital, Uppsala, Sweden.
Electroencephalogr Clin Neurophysiol. 1993 Oct;89(5):291-303. doi: 10.1016/0168-5597(93)90068-z.
The ability of a motor unit potential (MUP) parameter or a set of parameters to discriminate between control MUPs and MUPs from muscles with severe to moderate inactive neurogenic changes was investigated using discriminant analysis. As a single parameter, area gave rather good discrimination, while amplitude, duration and area/amplitude did not give good discrimination. Only 15-30% of MUPs from neurogenic muscles were judged to be abnormal by duration alone. The combination of amplitude and the area/amplitude ratio (area/amp; MUP thickness) improved the discrimination considerably and around 70% of MUPs in the neurogenic group were judged to be abnormal. A simple assigned discriminant function, 2 x log 10(amp) + area/amp, gave similar good results for both biceps brachii and tibialis anterior muscles, and this value was named as "size index." The experiment of manual scanning of an MUP revealed that area/amp increases, that is, the MUP becomes thicker, as the amplitude decreases for each MUP with increasing recording distance, while the size index remains almost constant for each MUP irrespective of the electrode position. The new parameter, size index, is promising since it is more stable and gives better discrimination results than duration.
使用判别分析研究运动单位电位（MUP）参数或一组参数区分对照MUP与来自有严重至中度失神经性改变肌肉的MUP的能力。作为单个参数，面积给出了相当好的判别结果，而波幅、时限和面积/波幅则没有给出好的判别结果。仅根据时限判断，来自神经性肌肉的MUP中只有15% - 30%被判定为异常。波幅与面积/波幅比（面积/波幅；MUP厚度）的组合显著提高了判别能力，神经性组中约70%的MUP被判定为异常。一个简单的指定判别函数2×log10（波幅）+面积/波幅，对肱二头肌和胫前肌都给出了相似的良好结果，这个值被命名为“大小指数”。对MUP进行手动扫描的实验表明，随着记录距离增加，每个MUP的波幅降低时面积/波幅增加，即MUP变得更厚，而每个MUP的大小指数无论电极位置如何几乎保持恒定。新参数大小指数很有前景，因为它比时限更稳定且判别结果更好。
