Pinto Rafael Zambelli, Ferreira Paulo Henrique, Franco Marcia Rodrigues, Ferreira Mariana Calais, Ferreira Manuela Loureiro, Teixeira-Salmela Luci Fuscaldi, Oliveira Vinicius C, Maher Christopher
Departamento de Fisioterapia, Universidade Federal de Minas Gerais, MG, Brazil.
Man Ther. 2011 Dec;16(6):578-84. doi: 10.1016/j.math.2011.05.010. Epub 2011 Jun 25.
This study investigated the effect of lumbar posture on function of transversus abdominis (TrA) and obliquus internus (OI) in people with and without non-specific low back pain (LBP) during a lower limb task. Rehabilitative ultrasound was used to measure thickness change of TrA and OI during a lower limb task that challenged the stability of the spine. Measures were taken in supine in neutral and flexed lumbar postures in 30 patients and 30 healthy subjects. Data were analysed using a two-way (groups, postures) ANOVA. Our results showed that lumbar posture influenced percent thickness change of the TRA muscle but not for OI. An interaction between group and posture was found for TrA thickness change (F(1,56) = 6.818, p = 0.012). For this muscle, only healthy participants showed greater thickness change with neutral posture compared to flexed (mean difference = 6.2%; 95% CI: 3.1-9.3%; p < 0.001). Comparisons between groups for both muscles were not significant. Neutral lumbar posture can facilitate an increase in thickness of the TrA muscle while performing a leg task, however this effect was not observed for this muscle in patients with LBP. No significant difference in TrA and OI thickness change between people with and without non-specific LBP was found.
本研究调查了在进行下肢任务时，腰椎姿势对有无非特异性下腰痛（LBP）人群腹横肌（TrA）和腹内斜肌（OI）功能的影响。在一项挑战脊柱稳定性的下肢任务中，使用康复超声测量TrA和OI的厚度变化。对30例患者和30名健康受试者在仰卧位腰椎中立位和屈曲位时进行测量。采用双向（组、姿势）方差分析对数据进行分析。我们的结果表明，腰椎姿势影响了腹横肌厚度变化百分比，但对腹内斜肌没有影响。发现腹横肌厚度变化存在组与姿势的交互作用（F(1,56) = 6.818，p = 0.012）。对于这块肌肉，只有健康参与者在中立位时比屈曲位显示出更大的厚度变化（平均差异 = 6.2%；95%CI：3.1 - 9.3%；p < 0.001）。两组之间这两块肌肉的比较无显著差异。腰椎中立位在进行腿部任务时可促进腹横肌厚度增加，然而在LBP患者中未观察到该肌肉的这种效应。未发现有无非特异性LBP人群之间腹横肌和腹内斜肌厚度变化的显著差异。
