Résumé
Objective To observe the clinical efficacy of acupuncture in treating hemifacial spasm and its effect on the surface electromyogram signal of orbicularis oculi muscle under contraction state.Method Seventy-six patients with hemifacial spasm were randomized into a treatment group and a control group, 38 cases in each group. The control group was intervened by conventional medications, while the treatment group was by acupuncture in addition to the intervention given to the control group. The surface electromyogram signal of orbicularis oculi muscle under contraction before and after intervention, clinical efficacies, and side effects were compared between the two groups.Result The MF and MPF values were significantly changed after intervention in both groups (P<0.05). After intervention, the MPF value in the treatment group was significantly different from that in the control group (P<0.05). The total effective rate was 92.1% in the treatment group versus 63.2% in the control group, and the difference was statistically significant (P<0.05). The TESS scores after intervention were significantly different from that before intervention in both groups (P<0.05). After intervention, the TESS score in the treatment group was significantly different from that in the control group (P<0.05).Conclusion Acupuncture is an effective method in treating hemifacial spasm, and it can release muscle fatigue.
Résumé
Objective To explore the correlation between the moving angle of elbow joint and surface electromyogram signal(sEMG)activities of biceps and triceps.Methods The eigenvalue of sEMG during elbow joint moving under constant load were calculated with means of root mean square(RMS)and integrated electromyogram(iEMG)in time domain.Results The experimental results showed that both the chavacteristics of RMS and iEMG for biceps differed from those of triceps.The sEMG activities of biceps increased with the increment of elbow joint angle,while those from triceps reached to the maximum values when elbow joint angle was 90?.Furthermore,the sEMG activities of triceps at the elbow angle of 45? was similar with that when elbow angle was 135?.Conclusion The sEMG from biceps and triceps can reflect the moving angle of elbow joint under constant load.
Résumé
This paper introduces an active electrode of preamplifier with ordinary electrode.It has the depression-ability to noise and interference,and more high signal/noise ratio about this electrode.It is fit for the detection of poor signal of bioelectricity.