In recent years I am interested in the role of nucleus raphe magnes (NRM)in acupuncture analgesia

NRM is the one of origins of important descendinginhibitory systems inclueded in the intrinsic anatgesic systems in brain

and wegave more systematic study on the question. The primary results are asfollows: 1. Experiments were perfored on male rats

unit discharges of NRMwere recorded extracellularly with glass electrode. The neurons responed tonoxious stimulation were chosen to observe analgesia of EA. The spontaneousfiring rates of NRM neurons were about 0.5-20Hz

a few of them over 20Hzor have no any discharges. NRM neurons have not often responses to non-noxious stimulation(to brush hair) or only have a light responses and adapt-ation appeared fast. But responses of them to noxious stimulation (to clampor to prick skin) or electrostimulation (20V) were obviously displayed with