title: Placenta Ingestion Enhances Analgesia  Produced by Vaginal/Cervical  Stimulation in Rats
creator: Kristal, Dr. Mark B.
creator: Thompson, Alexis C.
creator: Heller, Steve B.
creator: Komisaruk, Dr. Barry R.
subject: Behavioral Biology
subject: Psychobiology
subject: Physiological Psychology
subject: Behavioral Neuroscience
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/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.
publisher: Pergamon Press
date: 1986
type: Journal (Paginated)
type: PeerReviewed
format: application/pdf
identifier: http://cogprints.org/6254/1/VSIA.pdf
identifier:   Kristal, Dr. Mark B. and Thompson, Alexis C. and Heller, Steve B. and Komisaruk, Dr. Barry R.  (1986) Placenta Ingestion Enhances Analgesia Produced by Vaginal/Cervical Stimulation in Rats.  [Journal (Paginated)]     
relation: http://cogprints.org/6254/