Biull Eksp Biol Med. 1979 Nov; 88(11): 556-9.
[Acupuncture analgesia in rats and its changes under the effect of morphine and naloxone]
It was established in chronic experiments on rats that electric acupuncture of the acupuncture point noticeably decreases pain reaction to electric stimulation of the tail. Morphine given in a subanalgetic dose (5 mg/kg) potentiated acupuncture analgesia, while 5 mg/kg of naloxone completely abolished it. Potential mechanisms of analgesia realization during electric acupuncture are discussed.