Acute exposure to a 50 Hz magnetic field impairs consolidation of spatial memory in rats |
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Authors: | Jadidi Majid Firoozabadi Seyed Mohammad Rashidy-Pour Ali Sajadi Ahmad Ali Sadeghi Hassan Taherian Abbas Ali |
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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 |
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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. |
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