近年来

国内外在医学和兽医学临床上

广泛地应用了针刺镇痛.并对针刺镇痛原理也进行了比较广泛地研究

提出针刺镇痛是痛觉传入信息和针刺传入信息在中枢神经系统的不同水平上相互整合作用的At present

using cortical evoked potentials (CEP) as an index

many researchers have studied the role of the cerebral cortex in acupuncture analgesia. However

to find out whether the cerebral cortex plays a role in acupuncture analgesia

the sudies must first center efforts on relatioship between CEP and pain

and between cerebral cortex and the nucleus raphe magnus (NRM). Thirteen cats weighing 1.8-3kg were used in the present study. All the animals were kept conscious and inmobilized in all the process of the experiment. While somatosenaory area and Xieqi point (邪气穴) were stimulated

the spontaneous single discharge of the nueleus raphe magnus (NRM) were recorded

and at the same time the responses of levels before and after stimulation were observed and compared. The results are as follows: (1) In 55 spontaneous single discharges (SSD)

frequency range was 0.5-3/sec

pulse amplitude-250-400μv

and the greatest reached Imv. (2) In 55 spontaneous single discharges

when somatosensory area was stimulated

SSD of all the nucleus raphe magnus were increased. (3) In 12 spontaneous single discharges

SSD were observed under the influences of the acupuncture point and pain stimulation. The results obtained are as follows: 9 SSD were not affected by pain stimulation

whereas

when acupuncture point were stimulated

SSD of the nucleus raphe mugnus were increased.