Lauer Richard T, Prosser Laura A
Department of Physical Therapy, Temple University, 3307 North Broad Street, Philadelphia, PA 19140, USA.
Ann Biomed Eng. 2009 Aug;37(8):1584-93. doi: 10.1007/s10439-009-9727-9. Epub 2009 May 30.
The purpose of this study was to demonstrate the usefulness of the Teager-Kaiser Energy (TKE) operator to assess surface electromyographic (sEMG) activity from the hip and trunk muscles during pediatric gait in children with and without cerebral palsy (CP). Muscle activity was recorded from the trapezius, erector spinae, rectus abdominus, external oblique, gluteus maximus and medius, rectus femoris, and semitendinosus bilaterally in ten children with typical development (TD) and five children with CP ages 44.4 +/- 18.6 months. Duration of muscle activity was calculated as a percentage of the gait cycle, and compared to two common onset detection methods, a standard deviation (SD) amplitude threshold method, and the visual inspection from two raters (R1, R2). Relative and absolute agreement was determined using intraclass correlation coefficients (ICCs) and Bland-Altman plots. Of the two automated methods, the TKE method demonstrated better agreement with visual inspection (0.45-0.89) than the SD (0.11-0.76) method. The Bland-Altman plots indicated a smaller bias and 95% confidence interval for the TKE method in comparison to the raters (TKE to R1: -5, 113%; TKE to R2: 4, 95%; SD to R1: -24, 170%; SD to R2: -15, 151%). The use of the TKE operator may better detect sEMG activity in children than the standard amplitude method.
本研究的目的是证明蒂杰 - 凯泽能量（TKE）算子在评估脑瘫（CP）患儿和非脑瘫患儿小儿步态期间髋部和躯干肌肉表面肌电图（sEMG）活动方面的实用性。对10名发育正常（TD）儿童和5名年龄在44.4±18.6个月的CP儿童双侧的斜方肌、竖脊肌、腹直肌、腹外斜肌、臀大肌和臀中肌、股直肌以及半腱肌的肌肉活动进行记录。肌肉活动持续时间以步态周期的百分比计算，并与两种常见的起始检测方法进行比较，即标准差（SD）幅度阈值法和两名评估者（R1、R2）的目视检查。使用组内相关系数（ICC）和布兰德 - 奥特曼图确定相对一致性和绝对一致性。在两种自动化方法中，TKE方法与目视检查的一致性（0.45 - 0.89）优于SD方法（0.11 - 0.76）。布兰德 - 奥特曼图表明，与评估者相比，TKE方法的偏差和95%置信区间更小（TKE与R1比较：-5，113%；TKE与R2比较：4，95%；SD与R1比较：-24，170%；SD与R2比较：-15，151%）。与标准幅度法相比，使用TKE算子可能能更好地检测儿童的sEMG活动。
