Abstract：
Background and Objectives: We identified typical surface electromyogram (sEMG) activities of the cervical extensors and flexors during motions in the three anatomical planes in healthy adults. The aim of this study was to explore characteristics of sEMG activities of these cervical muscles in nonspecific neck pain (NSNP) patients based on healthy adults. Materials and Methods: Participants were 24 NSNP patients (NSNP group, mean ± SD of age, 47.5 ± 15.5) and 24 healthy adults (control group, 20.5 ± 1.4). For each participant, sEMG of the cervical extensors and flexors was recorded during neck flexion, extension, bilateral lateral flexion, bilateral rotation, and at the neutral position in Phase I (the neck from the neutral position to the maximum range of motion), Phase II (at the maximum range of motion), and Phase III (from the maximum range of motion to the neutral position), yielding a total of 42 phases. A percentage of maximum voluntary contraction to normalize muscle activity in each phase was calculated to obtain the ratio of muscle activities in the extensors and flexors in each of 36 phases of the motions to the neutral position and ratio of the flexors to extensors in activity for 21 phases. Results: In 28 of 36 phases of the motions, the ratios of muscle activities in the extensors and flexors to the neutral position in the NSNP group were significantly larger than the control group (p < 0.05). In 6 of 21 phases, the ratios of the flexors to extensors in activity in the NSNP group were significantly larger than in the control group (p < 0.05). Conclusions: In NSNP patients, the activity of the cervical extensors and flexors associated with neck motion increased with an imbalance in activity between these muscles compared to their activity in healthy adults. The results of this study will be useful in understanding the pathogenesis of NSNP and in constructing an objective evaluation of the treatment efficacy on NSNP patients.
摘要：
背景和目的：我们确定了健康成年人在三个解剖平面运动期间颈椎伸肌和屈肌的典型表面肌电图（sEMG）活动。这项研究的目的是探索基于健康成年人的非特异性颈部疼痛（NSNP）患者中这些颈部肌肉的sEMG活动特征。材料和方法：参与者为24名NSNP患者(NSNP组，年龄的平均值±SD，47.5±15.5)和24名健康成年人(对照组，20.5±1.4)。对于每个参与者，颈屈时颈伸肌和屈肌的sEMG记录，扩展,双侧侧屈,双边轮换,并且在阶段I中的中立位置（从中立位置到最大运动范围的颈部），第二阶段（最大运动范围），和阶段III（从最大运动范围到中立位置），共产生42个阶段。计算了使每个阶段的肌肉活动正常化的最大自愿收缩百分比，以获得运动的36个阶段中的每个阶段中的伸肌和屈肌的肌肉活动与中性位置的比率以及21个阶段中的屈肌与伸肌的活动比率。结果：在运动的36个阶段中，有28个阶段，NSNP组的伸肌和屈肌活动与中立位置的比率显着大于对照组（p＆lt;0.05）。在21个阶段中的6个阶段中，NSNP组活动中屈肌与伸肌的比率明显高于对照组(p<0.05)。结论：在NSNP患者中，与健康成年人相比，与颈部运动相关的颈部伸肌和屈肌的活动随着这些肌肉之间活动的不平衡而增加。这项研究的结果将有助于了解NSNP的发病机理，并对NSNP患者的治疗效果进行客观评估。
