Study of biosignal response during acupuncture points stimulations.

The present study examined the effect of electro-acupuncture stimulation of PC5 and PC6, acupuncture points located on the pericardium meridian, on electroencephalogram (EEG) changes, bioimpedance value, and electrocardiogram (ECG) heart rate. The EEGs of the frontal, central, temporal, parietal, and occipital lobes were measured. Generally, the EEGs increased at large amplitude in the all lobe during electro-acupuncture (EA) stimulation of PC5 and PC6. According to the present experiments, after the EA stimulation of PC5, EEG was verified to change at an extremely large amplitude in the temporal lobe. A comparison of biological active points (BAPs) and non-BAPs in bioimpedance measurement experiments revealed that reactance resistance had low-resistance characteristics and characteristics frequency had frequency characteristics. The ECG heart rate decreased at PC6 and increased at PC5. PC6 therefore may have a certain effect on sedation of the human nervous system. We applied CWT to detect short-time event and the result image representation of the signal has showed us that one can easily find the discontinuity at the time scale representation. The results of the present study verified that the EA stimulation of BAPs (PC5, PC6) affects EEG, human bioimpedance, and ECG heart rate, and such stimulation may be capable of affecting the nervous system.