BACKGROUND:There are no studies on the scoliotic population in which lateral abdominal muscle (LAM) was measured. OBJECTIVE:The aim of the study was to deliver the first results on LAM elasticity assessed by shear wave elastography (SWE) in right-side and left-side thoracolumbar scoliosis patients.METHOD:Twelve patients (mean age 12.25) with thoracolumbar scoliosis were included in the study. Muscle thickness and SWE of the obliquus external (OE), obliquus internal, and transversus abdominis (TrA) were measured with an ultrasound scanner. Measurements were taken at rest and during isometric contraction. RESULTS:An analysis showed that in right-side scoliosis, the OE muscle on the convex side was stiffer by 7.25 kPa compared to the concave side. The OE muscle on the convex side in right-side scoliosis was also stiffer by 11.6 kPa compared to the convex side in left-side scoliosis. In left-side scoliosis, the TrA muscle on the concave side was stiffer by 7.84 kPa compared to the convex side. CONCLUSION:Changes in LAM elasticity of thoracolumbar scoliosis were observed. A different pattern of LAM stiffness in different curve directions may be expected. OE and TrA shear moduli are the most sensitive to change in adolescent spinal deformation.

中文翻译：

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剪切波弹性成像技术评估胸腰段脊柱侧凸的腹侧外侧肌的初步研究。

背景：目前尚无关于测量侧腹肌（LAM）的脊柱侧弯人群的研究。目的：本研究旨在通过剪切波弹性成像法（SWE）评估左右胸腰椎侧弯患者的LAM弹性的初步结果。方法：纳入12名平均年龄为12.25岁的胸腰椎侧弯患者在研究中。用超声扫描仪测量斜肌外侧（OE），斜肌内侧和腹横肌（TrA）的肌肉厚度和SWE。在静止和等距收缩期间进行测量。结果：分析表明，在右侧脊柱侧弯中，与凹侧相比，凸侧的OE肌肉僵硬了7.25 kPa。右侧脊柱侧凸中的OE肌肉也变硬了11。与左侧脊柱侧凸的凸侧相比为6 kPa。在左侧脊柱侧弯中，与凸侧相比，凹侧的TrA肌肉僵硬了7.84 kPa。结论：胸腰椎侧凸LAM弹性改变。可以预期在不同曲线方向上会有不同的LAM刚度模式。OE和TrA剪切模量对青少年脊柱变形的变化最敏感。