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The Journal of Internal Korean Medicine > Volume 27(1); 2006 > Article
The Journal of Internal Korean Medicine 2006;27(1): 265-275.
腦硬塞 患者의 運動障碍에 對한 2Hz와 120Hz 電鍼 治療의 效果 比較: 운동유발전위검사를 통한 비교
홍진우, 최창민, 박영민, 신원준, 정동원, 박성욱, 정우상, 박정미, 문상관, 고창남, 조기호, 김영석, 배형섭
경희대학교 한의과대학 2내과학 교실
The Effect of 2Hz vs. 120Hz Frequency Electrical Acupoint Stimulation on Motor Recovery after Stroke by Motor Evoked Potential Study
Jin-woo Hong, Chang-min Choi, Young-min Park, Won-jun Shin, Dong-won Jeong, Seong-uk Park, Woo-sang Jung, Jung-mi Park, Sang-kwan Moon, Chang-nam Go, Ki-ho Cho, Young-suk Kim, Hyung-sup Bae
Department of Cardiovascular and Neurologic Diseases(Stroke Center) College of Oriental Medicine, Kyung-Hee University, Seoul, Korea
Correspondence  Young-suk Kim ,Tel: 02-958-9129, Fax: 02-958-9132, Email: coolchopin@hanmail.net
Received: February 21, 2006,   Accepted: February 28, 2006,   Published online: March 30, 2006.
Electrical acupoint stimulation(EAS) has been used to treat motor dysfunction of stroke patients with reportedly effective results. The purpose of this study is to evaluate the efficacy of the EAS with different frequencies in treating motor dysfunction of ischemic stroke patients.

Methods :
The subject of this study were forty-two ischemic stroke patients with motor dysfunction in Kyunghee oriental medicine hospital who were hospitalized for one week to one month from onset. They were treated with 2Hz or 120Hz EAS for two weeks, and motor evoked potentials(MEP) were measured before and after EAS treatment. To compare the effect of 2Hz EAS with 120Hz, the number of patients who showed MEP responses after two weeks among those who had no previous response was checked. Also measured were latency, central motor conduction time(CMCT), amplitude of MEP before and after EAS treatment.

After two weeks of treatment, 4 out of 15 patients(27%) in the 2Hz EAS group and 1 out of 19 patients(5%) in the 120Hz group showed potential responses. Yet there was no significant difference between the two groups. When MEP data of the affected side between the 2Hz group and the 120Hz group was compared, the former showed more significant improvement than the latter in latency, CMCT and amplitude(P=0.040, 0.019, 0.021). When the proportion of the affected side and unaffected side in MEP data was examined, the 2Hz group showed improvement on only latency and CMCT with significant differences(P=0.040, 0.014).

These results show that EAS with low frequency is more helpful for motor recovery after ischemic stroke than that with high frequency. This suggests that low frequency EAS activates the central motor conduction system better than high frequency EAS.
Key words: Electrical acupoint stimulation, Frequency specificity, Motor evoked potential, Ischemic stroke
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