针刺“曲池”穴循经感传的循经表面肌电变化研究

Variation of surface electromyography along meridian of propagated sensations along meridian after acupuncture ‘Quchi’ acupoint

摘要:

目的：研究针刺“曲池”穴激发的循经感传与循经表面肌电的关系。方法：分别针刺“曲池”穴、经脉非穴、非经非穴，引发循经感传，观察肱桡肌肌电活动的变化，记录肌电振幅和肌电变化维持时间。结果：针刺“曲池”穴，经脉非穴和非经非穴的循经感传阳性率有统计学差异（?字2=28.298，P=0.000），且针刺“曲池”穴和经脉非穴的循经感传阳性率高于非经非穴（?字2=24.783，P=0.000； ?字2=19.113，P=0.000）；针刺“曲池”穴，经脉非穴和非经非穴的肱桡肌肌电振幅有明显差异（?字2=61.659，P=0.000），且针刺“曲池”穴对肱桡肌肌电振幅高于经脉非穴和非经非穴（P=0.000）；针刺“曲池”穴，经脉非穴和非经非穴的肌电变化维持时间有统计学差异（F=129.846，P=0.000），且针刺“曲池”穴的肌电变化维持时间长于经脉非穴和非经非穴，针刺“曲池”穴、经脉非穴、非经非穴均能引发肱桡肌肌电振幅的改变。结论：针刺“曲池”穴循经感传相伴的肱桡肌肌电活动强于经脉非穴和非经非穴，针刺“曲池”穴对肱桡肌表面肌电活动影响具有穴位特异性。

Abstract:

Objective：To study the relationship between propagated sensations and surface electromyography along meridian caused by acupuncture at ‘Quchi’ acupoint. Methods：‘Quchi’ acupoint，non-acupoint of the meridian and non-acupoint control were acupunc－tured and propagated sensations were caused. Amplitude and muscle active duration of surface electromyography on brachioradialis were recorded. Results：There were significant differences in the positive frequency of propagated sensations along meridian at ‘Quchi’ acupoint，non-acupoint of the meridian and non-acupoint control（?字2=28.298，P=0.000）. Positive frequency of propagated sensations along meridian was significantly higher at ‘Quchi’ acupoint and non-acupoint of the meridian than at non-acupoint control（?字2=24.783，P=0.000； ?字2=19.113，P=0.000）. ‘Quchi’ acupoint，non-acupoint of the meridian and non-acupoint control were significantly different in the amplitude and muscle active duration（P=0.000）. Amplitude and muscle active duration showed obvious variation at ‘Quchi’ acupoint than at non-acupoint of the meridian and non-acupoint control. Acupuncture at ‘Quchi’ acupoint，non-acupoint of the meridian and non-acupoint control all caused the amplitude variation of surface electromyography on brachioradialis（P=0.000）. Conclusion：Synchronized surface electromyography on brachioradialis of propagated sensations along meridian caused by acupunc－ture at ‘Quchi’ acupoint is stronger than that caused by acupuncture at non-acupoint of the meridian and non-acupoint control and the effects of acupuncture at ‘Quchi’ acupoint on surface electromyography of brachioradialis show the acupoint specificity.