<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Amniotic-Fluid Ingestion Enhances the Central\r\nAnalgesic Effect of Morphine"^^ . "Amniotic fluid and placenta contain a substance (POEF) that when ingested enhances opioid-mediated analgesia produced by several agents (morphine injection, vaginal/cervical stimulation, late pregnancy, footshock), but not that produced by aspirin injection. The present series of experiments employed quaternary naltrexone, an opioid antagonist that does not readily cross the blood-brain barrier, in conjunction with either peripheral or central administration of morphine, to determine whether amniotic-fluid ingestion (and therefore POEF ingestion) enhances opioid-mediated analgesia by affecting the central and/or peripheral actions of morphine. The results suggest that POEF affects only the central analgesic effects of morphine."^^ . "1991" . . "26" . "6" . . "Pergamon Press"^^ . . . "Brain Research Bulletin"^^ . . . . . . . . . . . . . . "Mark B."^^ . "Kristal"^^ . "Mark B. Kristal"^^ . . "Jean M."^^ . "DiPirro"^^ . "Jean M. DiPirro"^^ . . "Alexis C."^^ . "Thompson"^^ . "Alexis C. Thompson"^^ . . . . . . "Amniotic-Fluid Ingestion Enhances the Central\r\nAnalgesic Effect of Morphine (PDF)"^^ . . . . . . . . . "central.pdf"^^ . . . "Amniotic-Fluid Ingestion Enhances the Central\r\nAnalgesic Effect of Morphine (Image (PNG))"^^ . . . . . . "preview.png"^^ . . . "Amniotic-Fluid Ingestion Enhances the Central\r\nAnalgesic Effect of Morphine (Indexer Terms)"^^ . . . . . . "indexcodes.txt"^^ . . "HTML Summary of #6211 \n\nAmniotic-Fluid Ingestion Enhances the Central \nAnalgesic Effect of Morphine\n\n" . "text/html" . . . "Psychobiology" . . . "Physiological Psychology" . . . "Neuropharmacology" . . . "Behavioral Neuroscience" . .