Physiological Significance of De-qi Sensation Induced by Acupuncture Stimulation from the Viewpoint of Event Related Potential (ERP) / 日本温泉気候物理医学会雑誌

ABSTRACT

Although De-qi sensation induced by acupuncture stimulation has been considered one of the conditions for good acupuncture effects, its physiological significance has not been clarified. Therefore, we examined the influence of De-qi sensation on the central nervous system (CNS) by measuring the event-related potential (ERP) induced by acupuncture stimulation.<br>Tests were conducted on nine healthy adult males. Acupuncture stimulation was given to these subjects, and ERPs were collected from three locations of the head, Fz, Cz, and Pz, using both ear lobes as reference electrodes. For control data, surface electric stimulation was given to the same subjects and ERPs were collected from the same locations. Acupuncture stimuli or electric stimuli were given to the left-side LI10 32 times at random intervals of 4 to 7 sec. To analyze ERPs, ERPs in response to 32 trials were averaged using a DP 1100 system (a signal processor made by NEC SANEI, LTD.).<br>The latency of the ERP triggered by acupuncture stimulation was approximately P350msec, while that of the ERP triggered by electric stimulation was found to be approximately P250msec, resulting in a difference of P100msec. These results suggest that the De-qi sensation induced by acupuncture stimulation may strongly influence the CNS functions, especially the processing recognition of CNS. It is suggested that this acupuncture stimuli related potential may not be p-LPC.