Miura Takuya, Yamanaka Masanori, Ukishiro Kengo, Tohyama Harukazu, Saito Hiroshi, Samukawa Mina, Kobayashi Takumi, Ino Takumi, Takeda Naoki
Graduate School of Health Sciences, Hokkaido University, Sapporo, Hokkaido, Japan.
Faculty of Health Sciences, Hokkaido University, West 5, North 12, Kita-ku, Sapporo 060-0812, Hokkaido, Japan.
Man Ther. 2014 Dec;19(6):534-40. doi: 10.1016/j.math.2014.05.010. Epub 2014 Jun 20.
The aim of this study was to evaluate the thickness of the transversus abdominis (TrA) muscle in three basic postures in subjects with and without chronic low back pain. Subjects were classified into a chronic low back pain group (n = 27) and a healthy control group (n = 23). The thickness of the TrA muscle was measured at rest and during the abdominal drawing-in manoeuvre (ADIM) in supine, sitting and standing postures using B-mode ultrasound imaging. Contraction ratio (TrA thickness during the ADIM/TrA thickness at rest) was calculated for each posture. At rest, the TrA thickness in the sitting and standing postures was significantly greater than in the supine posture (p < 0.017) in the control group, but similar in all three postures in the low back pain group. TrA thickness was similar in the low back pain and control group in all three postures. During the ADIM, TrA thickness was significantly greater in the control group than in the chronic low back pain group in all three postures. The contraction ratio was also significantly higher in the control group than in the chronic low back pain group in all three postures. These results indicate that the automatic postural contraction of the TrA observed in the control subjects in the sitting and standing postures was not demonstrated in subjects with chronic low back pain. The present study revealed the one aspect of different response of the TrA muscle to changing posture between two groups.
本研究的目的是评估慢性下腰痛患者和非慢性下腰痛患者在三种基本姿势下腹横肌（TrA）的厚度。受试者被分为慢性下腰痛组（n = 27）和健康对照组（n = 23）。使用B型超声成像在仰卧位、坐位和站立位静息状态及进行收腹动作（ADIM）时测量TrA肌肉的厚度。计算每个姿势下的收缩率（ADIM时TrA厚度/静息时TrA厚度）。静息时，对照组坐位和站立位的TrA厚度显著大于仰卧位（p < 0.017），但下腰痛组在所有三种姿势下相似。下腰痛组和对照组在所有三种姿势下TrA厚度相似。在进行ADIM时，对照组在所有三种姿势下TrA厚度均显著大于慢性下腰痛组。所有三种姿势下对照组的收缩率也显著高于慢性下腰痛组。这些结果表明，在坐位和站立位时对照组中观察到的TrA自动姿势收缩在慢性下腰痛患者中未表现出来。本研究揭示了两组之间TrA肌肉对姿势变化的不同反应的一个方面。
