TY - GEN ID - cogprints6254 UR - http://cogprints.org/6254/ A1 - Kristal, Dr. Mark B. A1 - Thompson, Alexis C. A1 - Heller, Steve B. A1 - Komisaruk, Dr. Barry R. Y1 - 1986/// N2 - Ingestion of placenta has previously been shown to enhance opiate-mediated analgesia (measured as tail-flick latency) induced either by morphine injection or by footshock. The present study was designed to test whether placenta ingestion would enhance the partly opiate-mediated analgesia produced by vaginal/cervical stimulation. Nulliparous Sprague-Dawley rats were tested for analgesia, using tail-flick latency, during and after vaginal/cervical stimulation; the tests for vaginal/cervical stimulation-induced analgesia were administered both before and after the rats ate placenta or ground beef. Placenta ingestion, but not beef ingestion. significantly heightened vaginal/cervical stimulation-induced analgesia. A subsequent morphine injection provided evidence that, as in a previous report, placenta ingestion, but not beef ingestion, enhanced morphine-induced analgesia. PB - Pergamon Press KW - Placenta KW - Pain KW - Opiates KW - Vaginal stimulation-produced analgesia KW - Tail-flick test KW - Afterbirth KW - Analgesia KW - Parturition KW - Placentophagia KW - VSPA KW - Vaginal/cervical stimulation KW - POEF TI - Placenta Ingestion Enhances Analgesia Produced by Vaginal/Cervical Stimulation in Rats SP - 1017 AV - public EP - 1020 ER -