PDF(Pubmed)
Abstract：
BACKGROUND: While low back pain (LBP) is the leading cause of disability worldwide, its clinical objective assessment is currently limited. Part of this syndrome arises from the abnormal sensorimotor control of back muscles, involving increased muscle fatigability (i.e., assessed with the Biering-Sorensen test) and abnormal muscle activation patterns (i.e., the flexion-extension test). Surface electromyography (sEMG) provides objective measures of muscle fatigue development (median frequency drop, MDF) and activation patterns (RMS amplitude change). This study therefore assessed the sensitivity and validity of a novel and flexible sEMG system (NSS) based on PEVA electrodes and potentially embeddable in textiles, as a tool for objective clinical LBP assessment.
METHODS: Twelve participants wearing NSS and a commercial laboratory sEMG system (CSS) performed two clinical tests used in LBP assessment (Biering-Sorensen and flexion-extension). Erector spinae muscle activity was recorded at T12-L1 and L4-L5.
RESULTS: NSS showed sensitivity to sEMG changes associated with fatigue development and muscle activations during flexion-extension movements (p < 0.05) that were similar to CSS (p > 0.05). Raw signals showed moderate cross-correlations (MDF: 0.60-0.68; RMS: 0.53-0.62). Adding conductive gel to the PEVA electrodes did not influence sEMG signal interpretation (p > 0.05).
CONCLUSIONS: This novel sEMG system is promising for assessing electrophysiological indicators of LBP during clinical tests.
METHODS: Twelve participants wearing NSS and a commercial laboratory sEMG system (CSS) performed two clinical tests used in LBP assessment (Biering-Sorensen and flexion-extension). Erector spinae muscle activity was recorded at T12-L1 and L4-L5.
RESULTS: NSS showed sensitivity to sEMG changes associated with fatigue development and muscle activations during flexion-extension movements (p < 0.05) that were similar to CSS (p > 0.05). Raw signals showed moderate cross-correlations (MDF: 0.60-0.68; RMS: 0.53-0.62). Adding conductive gel to the PEVA electrodes did not influence sEMG signal interpretation (p > 0.05).
CONCLUSIONS: This novel sEMG system is promising for assessing electrophysiological indicators of LBP during clinical tests.
摘要：
背景：虽然下腰痛（LBP）是全球残疾的主要原因，其临床客观评估目前是有限的。这种综合征的部分原因是背部肌肉的感觉运动控制异常，涉及增加的肌肉疲劳性(即，用Biering-Sorensen测试评估)和异常的肌肉激活模式(即，屈伸试验)。表面肌电图（sEMG）提供了肌肉疲劳发展的客观测量（中值频率下降，MDF)和激活模式(RMS振幅变化)。因此，这项研究评估了基于PEVA电极并可能嵌入纺织品的新型柔性sEMG系统（NSS）的灵敏度和有效性。作为客观临床LBP评估的工具。
方法：12名穿着NSS和商业实验室sEMG系统（CSS）的参与者进行了用于LBP评估的两项临床试验（Biering-Sorensen和屈伸）。在T12-L1和L4-L5记录勃起脊髓肌活性。
结果：NSS显示出与屈伸运动过程中疲劳发展和肌肉激活相关的sEMG变化的敏感性（p<0.05），与CSS相似（p>0.05）。原始信号显示中等交叉相关(MDF:0.60-0.68;RMS:0.53-0.62)。向PEVA电极添加导电凝胶不影响sEMG信号解释(p>0.05)。
结论：这种新型sEMG系统有望在临床试验中评估LBP的电生理指标。
方法：12名穿着NSS和商业实验室sEMG系统（CSS）的参与者进行了用于LBP评估的两项临床试验（Biering-Sorensen和屈伸）。在T12-L1和L4-L5记录勃起脊髓肌活性。
结果：NSS显示出与屈伸运动过程中疲劳发展和肌肉激活相关的sEMG变化的敏感性（p<0.05），与CSS相似（p>0.05）。原始信号显示中等交叉相关(MDF:0.60-0.68;RMS:0.53-0.62)。向PEVA电极添加导电凝胶不影响sEMG信号解释(p>0.05)。
结论：这种新型sEMG系统有望在临床试验中评估LBP的电生理指标。
