Department of Neuroscience, Clinical Neurophysiology, Uppsala University, Uppsala SE-751 85, Sweden.
Muscle Nerve. 2011 Mar;43(3):335-41. doi: 10.1002/mus.21878. Epub 2011 Jan 25.
Our objective was to establish the usefulness of the noninvasive method of the motor unit number index (MUNIX) in a large muscle and to study how macro electromyography (EMG) and MUNIX complement each other in describing the motor units (MUs) in prior polio. MUNIX and macro EMG were performed in 48 tibialis anterior muscles in 33 prior polio patients. In addition, the reproducibility of MUNIX was investigated. It is shown that MUNIX can be used to characterize MUs with high reproducibility, even in a large muscle. As judged by MUNIX values, the patients had a 25% reduction of motor neurons, whereas the macro EMG indicated a loss of 60% of the neurons. Macro EMG showed more pronounced changes compared with control material than the MUNIX. One of the reasons for this finding may be the difference in MU populations studied with the two methods.
我们的目的是在一块大肌肉中建立运动单位数量指数（MUNIX）的无创方法的有用性，并研究宏观肌电图（EMG）和 MUNIX 如何在描述既往小儿麻痹症中的运动单位（MU）方面相互补充。在 33 名既往小儿麻痹症患者的 48 块胫骨前肌中进行了 MUNIX 和宏观 EMG。此外，还研究了 MUNIX 的可重复性。结果表明，MUNIX 可以用于以高重复性来描述 MU，即使是在大块肌肉中。根据 MUNIX 值判断，患者的运动神经元减少了 25%，而宏观 EMG 则表明神经元减少了 60%。与对照材料相比，宏观 EMG 显示出比 MUNIX 更明显的变化。造成这种发现的原因之一可能是两种方法研究的 MU 群体不同。
