"6254","Placenta Ingestion Enhances Analgesia  Produced by Vaginal/Cervical  Stimulation in Rats","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.","http://cogprints.org/6254/","Kristal, Dr. Mark B. and Thompson, Alexis C. and Heller, Steve B. and Komisaruk, Dr. Barry R.","UNSPECIFIED","       <span class=\"person_name\">Kristal, Dr. Mark B.</span> and <span class=\"person_name\">Thompson, Alexis C.</span> and <span class=\"person_name\">Heller, Steve B.</span> and <span class=\"person_name\">Komisaruk, Dr. Barry R.</span>     (1986)  <a href=\"http://cogprints.org/6254/\"><em>Placenta Ingestion Enhances Analgesia&#13; Produced by Vaginal/Cervical&#13; Stimulation in Rats.</em></a>       [Journal (Paginated)]           ","kristal@buffalo.edu,athompso@RIA.Buffalo.EDU,,","1986"