title: Acute exposure to a 50 Hz magnetic field impairs consolidation of spatial memory in rats.
abstract: This study was planned to evaluate the effect of an exposure to magnetic fields on consolidation and retrieval of hippocampus dependent spatial memory using a water maze. In Experiments 1 and 2, rats were trained in a hidden version (spatial) of water maze task with two blocks of four trials. The retention of spatial memory was evaluated 48 h later. Exposure to a 50 Hz 8 mT, but not 2 mT magnetic fields for 20 min immediately after training impaired retention performance. The same time exposure shortly before retention testing had no effect. In Experiment 3, rats were trained in a cued version of water maze with two blocks of four trials. Exposure to magnetic field at 8 mT for 20 min immediately after training did not impair retention performance. These findings indicate that acute exposure to a 50 Hz magnetic field at 8 mT for short time can impair consolidation of spatial memory.
authors.affiliation: Laboratory of Learning and Memory, Department and Physiology Research Center, Semnan University of Medical Sciences, P.O. Box 35195-163, Semnan, Iran. Jadidim@sem-ums.ac.ir
authors.forename: Majid
authors.initials: M
authors.lastname: Jadidi
authors.forename: Seyed Mohammad
authors.initials: SM
authors.lastname: Firoozabadi
authors.forename: Ali
authors.initials: A
authors.lastname: Rashidy-Pour
authors.forename: Ahmad Ali
authors.initials: AA
authors.lastname: Sajadi
authors.forename: Hassan
authors.initials: H
authors.lastname: Sadeghi
authors.forename: Abbas Ali
authors.initials: AA
authors.lastname: Taherian
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D004558:Electric Stimulation / Q000295:instrumentation / Q000379:methods; D004574:Electromagnetic Fields / Q000009:adverse effects*; D006624:Hippocampus / Q000502:physiology* / Q000528:radiation effects; D008297:Male; D018782:Maze Learning / Q000502:physiology* / Q000528:radiation effects; D051381:Rats; D017208:Rats, Wistar; D012153:Retention, Psychology / Q000502:physiology / Q000528:radiation effects; D013028:Space Perception / Q000502:physiology* / Q000528:radiation effects; D013037:Spatial Behavior / Q000502:physiology* / Q000528:radiation effects; D018709:Statistics, Nonparametric