Department of Physical Therapy, Saitama Prefectural University, Koshigaya, Saitama, Japan.
Department of Physical Therapy, Saitama Prefectural University, Koshigaya, Saitama, Japan.
J Electromyogr Kinesiol. 2020 Dec;55:102476. doi: 10.1016/j.jelekin.2020.102476. Epub 2020 Sep 29.
Ultrasonography (US) measurements of the transversus abdominis muscle (TrA) during abdominal hollowing (AH) are conducted at the maximum AH, which would be unable to evaluate isolated control of the TrA to the internal or external oblique muscles (outer muscles). The present study aimed to establish a reliable method to evaluate the skills of isolated control of the TrA to the outer muscles using US. The datasets of two follow-ups were analyzed with 1-week interval of a wait-and-see control group comprising 20 participants with LBP in a randomized controlled trial. The primary measures were; % change in the thickness of the TrA at 1 cm lateral to the muscle-fascia junction of the TrA, and changes in horizontal distance of the superior edge of the TrA fascia. The measurement time points were immediately before AH during resting and when outer muscle thickness above 1 cm lateral to the muscle-fascia junction of the TrA increased by 10%. Consequently, five repetitions were required to obtain a stable mean value and good reliability (intraclass correlation coefficient [ICC] = 0.65-0.68 for the % change, and 0.84-0.88 for the change in horizontal distance; ICC = 0.82 for the % change, and 0.93 for the change in horizontal distance).
超声测量腹横肌（TrA）在腹内凹时（AH）的测量是在最大 AH 时进行的，这将无法评估 TrA 对内外斜肌（外肌）的单独控制。本研究旨在建立一种可靠的方法，使用超声评估 TrA 对外部肌肉的单独控制能力。对一项随机对照试验中 20 名腰痛患者的为期 1 周的等待对照组成员的 2 次随访数据集进行了分析。主要测量指标为：TrA 筋膜交界处外侧 1cm 处 TrA 厚度的变化百分比，以及 TrA 筋膜上缘水平距离的变化。测量时间点为在休息时进行 AH 之前，以及当外肌厚度在 TrA 筋膜交界处外侧 1cm 处增加 10%时。因此，需要进行 5 次重复以获得稳定的平均值和良好的可靠性（%变化的组内相关系数 [ICC]为 0.65-0.68，水平距离变化的 ICC 为 0.84-0.88；%变化的 ICC 为 0.82，水平距离变化的 ICC 为 0.93）。
