Nepomuceno C, McCutcheon M, Miller J M, Gowens H, Oh S, Stover S, Blackstone E
Am J Phys Med. 1977 Feb;56(1):1-11.
The principle in electromyography that positive sharp waves (PSW) and fibrillation potentials (FP) are pathognomonic of lower motor neuron (LMN) pathology is challenged by recent reports that the same potentials are observed in upper motor neuron (UMN) lesions. We have also observed positive sharp waves and fibrillation potentials in patients with UMN lesions, without conditions that involve the LMN. This study was undertaken to ascertain if there are differences in the potentials between the LMN and UMN lesions. Twenty-five UMN and 25 LMN patients were electromyographed. Manual and computer analyses were used to compare parameters from positive sharp wave and fibrillation potentials. Our findings indicate that there are interlesion differences in the mean frequency of occurrence ratio of PSW to FP and in some of the durational wave parameters.
肌电图中，正锐波（PSW）和纤颤电位（FP）是下运动神经元（LMN）病变特征性表现的这一原则，受到了近期报告的挑战，这些报告指出在上运动神经元（UMN）病变中也观察到了相同的电位。我们也在UMN病变患者中观察到了正锐波和纤颤电位，且不存在累及LMN的情况。本研究旨在确定UMN和LMN病变之间的电位是否存在差异。对25例UMN患者和25例LMN患者进行了肌电图检查。采用手动和计算机分析方法比较正锐波和纤颤电位的参数。我们的研究结果表明，PSW与FP发生率的平均频率以及一些持续时间波形参数在不同病变之间存在差异。
