Pfeiffer G, Kunze K
Department of Neurology, University Hospital of Hamburg, F.R.G.
Electroencephalogr Clin Neurophysiol. 1992 Jun;85(3):161-5. doi: 10.1016/0168-5597(92)90127-w.
Different turn algorithms are used for quantitative motor unit potential (MUP) analysis. To compare their retest reliability, 420 myopathic and neuropathic MUPs were recorded twice and the turn count of the first registration was correlated with that of the second. Reliability was best for the algorithm according to Willison as compared to the conventionally used algorithms based on amplitude criteria for 2 or 3 successive relative extrema. As demonstrated by discriminant analysis, an amplitude limit of 25 microV yielded more useful turn counts than a limit of 50 microV if myopathic MUPs had to be discriminated from normal MUPs. For this discrimination the turn count was superior to the phase count which did not further improve the discriminant model. This was different for the discrimination between normal and neuropathic MUPs. In this case, both parameters measured partly independent features of the MUP and had to be considered together.
不同的转折算法用于定量运动单位电位（MUP）分析。为比较它们的重测可靠性，对420个肌病性和神经病性MUP进行了两次记录，并将第一次记录的转折计数与第二次的进行相关性分析。与基于2个或3个连续相对极值的幅度标准的传统算法相比，根据威利森算法的可靠性最佳。判别分析表明，如果必须将肌病性MUP与正常MUP区分开来，25微伏的幅度限制比50微伏的限制产生更有用的转折计数。对于这种区分，转折计数优于相位计数，相位计数并未进一步改善判别模型。对于正常和神经病性MUP之间的区分则不同。在这种情况下，两个参数部分测量了MUP的独立特征，必须一起考虑。
