- 期刊
四種不同的電剌激模式於人體穴位之經絡及肌電現象之研究
An Evaluation on the Effects of Four Different Modes of Acupuncture-Like Transcutaneous Electrical Nerve Stimulation
摘要
本研究的目的是利用良導絡儀及肌電圖儀來觀察四種穴位電刺激模式（2Hz、100Hz、複合式頻率1~150Hz及調製中頻波電刺激（基本波5KHz，調製波1.2Hz）於人體的刺激反應，除了驗證穴位電刺激是否伴隨著循經肌電現象的產生，進一步評估何種穴位電刺激模式於人體有較佳的刺激反應。 結果顯示，這四種電刺激都會使正常人部分經絡的良導絡值有下降的趨勢，說明了人體12經絡『經絡相貫，如環無端』的特性。在肌電現象方面，經絡處肌電振幅大於非經絡處，在功率頻譜表現上，經絡處則是呈現出與非經絡處相同的結果。 由肌電圖功率頻譜來觀察四種穴位電刺激模式於人體產生的刺激反應，2Hz電刺激肌肉收縮的同時會產生10~50Hz的能量分佈，其中並涵蓋了肌肉收縮時的正後電位頻率(15Hz)。100Hz電刺激容易使肌肉產生過度收縮而發生肌肉疲勞，導致肌電能量的中位頻率與平均頻率訊號產生了轉移(shift)現象。複合式電刺激產生的肌電訊號能量分佈與低頻(2Hz)或高頻(100Hz)電刺激實驗模式下之功率頻譜相一致，但相較於單一頻率對肌肉的連續刺激，複合式電刺激較少發生肌肉疲勞的電位訊號。調製中頻波刺激電刺激於肌肉尚未產生收縮時即進入肌肉收縮電位時之不應期，可在不產生肌肉收縮下令人體的導電度產生差異，極不易引起肌肉疲勞，也間接證明了此種頻率的電刺激也許優於其他幾種電刺激模式。
並列摘要
The purpose of this research was to evaluate the effects on human body when stimulated with four kinds of AL-TENS (Acupuncture-Like Transcutaneous Electrical Nerve Stimulation) mode (2Hz, 100Hz, 1~150Hz complex frequency, and modulated middle frequency (1.2Hz carries 5000Hz) electrical stimulations) by using Ryodoraku system and electromyography. We want to verify if electromyograph of meridian arisen comes along with AL-TENS, and to evaluate which kind of AL-TENS mode is most suitable for human. The four kinds of AL-TENS on human body resulted in descreasing of some meridian's Ryodoraku values. That explains human's 12 meridians are connected just like a ring without endings. The electromyograph values of meridians were larger than that of non-meridian area. However, meridian and non-meridian had the same results on the power spectra. By observing the EMG power spectrum of the AL-TENS modes stimulated on human, the 2Hz electrical stimulation generated an energy field ranging from 5~35Hz, including the frequency of afterward potential (positive) created by the contraction of the muscle. The 100Hz electric stimulation easily made the muscle over-contract and resulted in tiredness of the muscle. That created a shifting effect of the mid-range frequency and the average frequency of electromyograph energy. The energy range of the electromyograph signal created by the complex frequency AL-TENS was similar to that of the low frequency (2Hz) or the high frequency (100Hz) AL-TENS. However compared with the stimulation of muscle by single frequency mode, the complex AL-TENS generated less muscle tiredness electrical signal. Therefore stimulation of muscle by modulated middle-frequency AL-TENS performed better than other AL-TENS modes.