■MScanFit是一种基于模型的算法,用于根据复合肌肉动作电位(CMAP)扫描数据进行运动单位数量估计(MUNE)。它是一个临床适用的工具,因为它的快速和自动实施。在现有研究中,使用具有不同记录区域的电极来记录CMAP扫描数据。然而,电极记录面积对MScanFitMUNE和其他CMAP扫描参数的影响尚未研究。
■使用三个不同的电极,记录面积为10mm×10mm,对14名健康受试者的双手的外展肌进行了CMAP扫描,11mm×14mm,和22毫米×26毫米,分别。对于每次CMAP扫描,使用MScanFit估计电机单元数。两个电机单元号指标参数,即,D50和阶跃指数(STEPIX),也是从CMAP扫描数据中得出的。
■D50,STEPIX,在三个不同的电极记录区域观察到MScanFitMUNE,尽管当使用较大的电极时,CMAP的振幅显着降低。对于MScanFitMUNE和STEPIX,获得了0.792和0.782的组内相关系数,分别。
■与CMAP振幅相比,D50,STEPIX,和MScanFitMUNE对电极记录区域的变化较不敏感。然而,电极记录区域的不一致性可能会损害MScanFitMUNE的可重复性。
UNASSIGNED: MScanFit is a model-based algorithm for motor unit number estimation (MUNE) from compound muscle action potential (CMAP) scan data. It is a clinically applicable tool because of its quick and automatic implementation. Electrodes with different recording areas were employed to record CMAP scan data in existing studies. However, the effect of electrode recording area on MScanFit MUNE and other CMAP scan parameters has not been studied.
UNASSIGNED: CMAP scan was performed on the abductor pollicis brevis muscle of both hands on 14 healthy subjects using three different electrodes with recording areas of 10 mm × 10 mm, 11 mm × 14 mm, and 22 mm × 26 mm, respectively. Motor unit number was estimated using MScanFit for each CMAP scan. Two motor unit number index parameters, i.e., D50 and step index (STEPIX), were also derived from the CMAP scan data.
UNASSIGNED: No significant difference in D50, STEPIX, and MScanFit MUNE was observed across three different electrode recording areas, although the amplitude of CMAP decreased significantly when a larger electrode was used. Intraclass correlation coefficients of 0.792 and 0.782 were obtained for MScanFit MUNE and STEPIX, respectively.
UNASSIGNED: Compared with CMAP amplitude, D50, STEPIX, and MScanFit MUNE are less sensitive to variation in electrode recording area. However, the repeatability of MScanFit MUNE could be compromised by the inconsistency in the electrode recording area.