Positive feedback action of pituitary beta-endorphin on acupuncture analgesia afferent pathway.


Potentials in the final sector of the afferent pathway from the acupuncture point (AP) were enhanced by intraperitoneal 0.5 mg/kg morphine without changing the threshold of AP stimulation and greatly decreased by hypophysectomy. The decreased potentials were restored to the control level by morphine (0.5 mg/kg, IP). Potentials evoked in the final sector of… (More)


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