title: Analgesic and behavioral effects of a 100 microT specific pulsed extremely low frequency magnetic field on control and morphine treated CF-1 mice.
abstract: Diverse studies have shown that magnetic fields can affect behavioral and physiological functions. Previously, we have shown that sinusoidal extremely low frequency magnetic fields and specific pulsed magnetic fields (Cnps) can produce alterations in the analgesia-related behavior of the land snail. Here, we have extended these studies to show an induction of analgesia in mice equivalent to a moderate dose of morphine (5 mg/kg), and the effect of both Cnp exposure and morphine injection on some open-field activity. Cnp exposure was found to prolong the response latency to a nociceptive thermal stimulus (hot plate). Cnp+morphine offset the increased movement activity found with morphine alone. These results suggest that pulsed magnetic fields can induce analgesic behavior in mice without the side effects often associated with opiates like morphine.
authors.affiliation: Bioelectromagnetics, Lawson Health Research Institute, Department of Nuclear Medicine, St. Joseph's Health Care, 268 Grosvenor Street, London, Ont. N6A 4V2, Canada.
authors.forename: Naomi M
authors.initials: NM
authors.lastname: Shupak
authors.forename: Jennifer M
authors.initials: JM
authors.lastname: Hensel
authors.forename: Shelly K
authors.initials: SK
authors.lastname: Cross-Mellor
authors.forename: Martin
authors.initials: M
authors.lastname: Kavaliers
authors.forename: Frank S
authors.initials: FS
authors.lastname: Prato
authors.forename: Alex W
authors.initials: AW
authors.lastname: Thomas
mesh_terms: D000701:Analgesics, Opioid / Q000494:pharmacology*; D000818:Animals; D001921:Brain / Q000187:drug effects / Q000502:physiology*; D004574:Electromagnetic Fields; D006358:Hot Temperature; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D009020:Morphine / Q000494:pharmacology*; D009043:Motor Activity / Q000187:drug effects / Q000502:physiology; D017288:Pain Threshold / Q000187:drug effects / Q000502:physiology; D011930:Reaction Time / Q000187:drug effects / Q000502:physiology
chemical_list: D000701:Analgesics, Opioid; D009020:Morphine