中文摘要：

目的 观察非手术脊柱减压系统（SDS）牵引及普通牵引对颈棘旁肌表面肌电信号的影响.方法 随机选取健康青年志愿者22例,采用SDS和普通牵引对受试者进行测试,不同测试间需相隔24 h以上,测试时利用表面肌电图仪对受试者双侧颈棘旁肌肌电活动的波幅均值及波幅峰值进行记录,观察受试者在坐立位和平卧位时不同牵引阶段的表面肌电信号变化.结果 与左侧颈棘旁肌比较,右侧颈棘旁肌的波幅均值及波幅峰值均有不同程度变化,但差异无统计学意义（P＞0.05）.普通牵引时,坐立位牵引中及牵引后的波幅均值及波幅峰值均低于牵引前（P＜0.05）,左侧颈棘旁肌坐立位牵引后的波幅均值[（17.91±4.06） μV]及波幅峰值[（21.00 ±4.74） μV]高于坐立位牵引中的波幅均值[（12.91±2.89）μV]及波幅峰值[（16.45 ±4.19）μV] （P ＜0.05）,右侧颈棘旁肌坐立位牵引后的波幅均值[（17.55 ±3.22）μV]及波幅峰值[（21.73±4.17）μV]亦高于坐立位牵引中的波幅均值[（14.00±2.86） μV]及波幅峰值[（16.09±3.13） μV]（P＜0.05）.SDS牵引下,与同侧颈棘旁肌坐立位牵引前比较,受试者平卧位牵引前、平卧位牵引中、平卧位牵引后及坐立位牵引后的波幅均值、波幅峰值均降低,差异有统计学意义（P＜0.05）.平卧位牵引中、平卧位牵引后的波幅均值、波幅峰值均较同侧颈棘旁肌平卧位牵引前低（P＜0.05）,坐立位牵引后的波幅均值、波幅峰值较平卧位牵引前高（P＜0.05）.与平卧位牵引中比较,同侧颈棘旁肌平卧位牵引后、坐立位牵引后的波幅均值及波幅峰值较高（P＜0.05）.坐立位牵引后的波幅均值、波幅峰值较同侧颈棘旁肌平卧位牵引后高,差异有统计学意义（P＜0.05）.结论 SDS牵引及普通牵引均能较好地放松颈部肌肉,但SDS的效果更为优异,值得临床应用、推广.

英文摘要：

Objective To compare the effects of nonsurgical spinal decompression system （SDS） cervical traction and common cervical traction using surface electromyography （sEMG）.Methods Twenty-two volunteers＇ sEMG signals were recorded before,during and after two modes of cervical traction：the conventional traction in sitting and SDS traction in supine.The interval between the two modes of traction was no shorter than 24 hours.The mean and peak amplitudes of their sEMG signals were observed before,during and after traction.The sEMG signals of the posterior cervical muscle while sitting or lying were compared at different stages of the traction.Results There was no statistically significant difference in sEMG signals between the subjects＇ right and left posterior cervical muscles.The sEMG signals decreased significantly during both traction trials.With common cervical traction the mean and peak amplitudes of the left posterior cervical muscle preand post-traction were higher than during traction,and the same as that of the right posterior cervical muscle.In the SDS trials the sEMG signals during traction and posttraction were significantly lower than those pretraction.After traction the sEMG signals while sitting （common cervical traction） were significantly higher than those post-traction while lying （SDS cervical traction）,and the sEMG signals post-traction while either lying or sitting were stronger than during traction while lying.The post-traction signals in sitting were stronger than those in lying.Conclusions Both nonsurgical SDS and common cervical traction can relax the posterior cervical muscles.The effect of nonsurgical SDS was better than that of common cervical traction.