斜方肌上部运动单位数量估计和定量运动单位分析的组内和组间可靠性。
Intra- and inter-rater reliability of motor unit number estimation and quantitative motor unit analysis in the upper trapezius.
机构信息
Health and Rehabilitation Sciences, University of Western Ontario, London, Ontario, Canada.
出版信息
Clin Neurophysiol. 2012 Jan;123(1):200-5. doi: 10.1016/j.clinph.2011.05.013. Epub 2011 Jun 16.
OBJECTIVE
To collect normative data and assess the intra- and inter-rater reliability of decomposition-enhanced spike-triggered averaging (DE-STA) motor unit number estimation (MUNE) and quantitative MU analysis obtained using decomposition-based quantitative electromyography (DQEMG) in the upper trapezius (UT).
METHODS
In 10 control subjects, the experimental protocol was performed twice by the same examiner, and once by a second examiner.
RESULTS
Mean MUNE values were 339±121 (rater 1a), 320±131 (rater 1b), and 262±115 (rater 2) MUs. Intra- and inter-rater reliability was good for maximum CMAP (ICC=0.77 and 0.79, respectively) and moderate for MUNE (ICC=0.69 and 0.73, respectively), with poor inter-rater reliability for mean S-MUP (ICC=0.42). Significant differences between rater 1a and 2 were found for mean S-MUP (p=0.014) and MUNE (p=0.002), and moderate to good levels of reliability found for quantitative needle-detected MUP parameters.
CONCLUSIONS
Various components of the protocol may have contributed to mean S-MUP variability, and may require particular attention in a large, proximal muscle like the UT.
SIGNIFICANCE
This study has established preliminary data using DQEMG in a novel muscle which may be relevant to study in patients with ALS.
目的
收集规范数据，并评估基于分解的定量肌电图（DQEMG）中分解增强的尖峰触发平均（DE-STA）运动单位数量估计（MUNE）和定量 MU 分析在上斜方肌（UT）中的内和间评分者可靠性。
方法
在 10 名对照受试者中，同一检查者进行了两次实验方案，第二检查者进行了一次。
结果
平均 MUNE 值为 339±121（评分者 1a）、320±131（评分者 1b）和 262±115（评分者 2）MU。最大 CMAP 的内和间评分者可靠性良好（ICC 分别为 0.77 和 0.79），MUNE 为中度可靠（ICC 分别为 0.69 和 0.73），平均 S-MUP 的间评分者可靠性较差（ICC 为 0.42）。评分者 1a 和 2 之间在平均 S-MUP（p=0.014）和 MUNE（p=0.002）方面存在显著差异，定量针检测 MUP 参数具有中度至良好的可靠性水平。
结论
方案的各个组成部分可能导致平均 S-MUP 变异性，并且在像 UT 这样的大近端肌肉中可能需要特别注意。
意义
本研究使用 DQEMG 在一种新的肌肉中建立了初步数据，这可能与 ALS 患者的研究相关。
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