?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Placenta+Ingestion+Enhances+Analgesia%0D%0AProduced+by+Vaginal%2FCervical%0D%0AStimulation+in+Rats&rft.creator=Kristal%2C+Dr.+Mark+B.&rft.creator=Thompson%2C+Alexis+C.&rft.creator=Heller%2C+Steve+B.&rft.creator=Komisaruk%2C+Dr.+Barry+R.&rft.subject=Behavioral+Biology&rft.subject=Psychobiology&rft.subject=Physiological+Psychology&rft.subject=Behavioral+Neuroscience&rft.description=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%2Fcervical+stimulation.+Nulliparous+Sprague-Dawley+rats+were+tested+for+analgesia%2C+using+tail-flick+latency%2C+during+and+after+vaginal%2Fcervical+stimulation%3B+the+tests+for+vaginal%2Fcervical+stimulation-induced+analgesia+were+administered+both+before+and+after+the+rats+ate+placenta+or+ground+beef.+Placenta+ingestion%2C+but+not+beef+ingestion.+significantly+heightened+vaginal%2Fcervical+stimulation-induced+analgesia.+A+subsequent+morphine+injection+provided+evidence+that%2C+as+in+a+previous+report%2C+placenta+ingestion%2C+but+not+beef+ingestion%2C+enhanced+morphine-induced+analgesia.&rft.publisher=Pergamon+Press&rft.date=1986&rft.type=Journal+(Paginated)&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Fcogprints.org%2F6254%2F1%2FVSIA.pdf&rft.identifier=++Kristal%2C+Dr.+Mark+B.+and+Thompson%2C+Alexis+C.+and+Heller%2C+Steve+B.+and+Komisaruk%2C+Dr.+Barry+R.++(1986)+Placenta+Ingestion+Enhances+Analgesia+Produced+by+Vaginal%2FCervical+Stimulation+in+Rats.++%5BJournal+(Paginated)%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F6254%2F