Adult, male rats weighing 160 to 180 g passed five training sessions (one session consisted of four trials) in which they learned to locate a submerged platform in a circular water maze. Probe trials were assessed every 1.5 hours and 24 hours after the last training trial during which the platform was removed to examine the retrieval of short-term and long-term spatial memory.
Exposure duration: 1 h/day or 4 h/day for 4 weeks
|magnetic flux density||2 mT||peak value||measured||-||-|
The chronic exposure to extremely low frequency magnetic field reduced the latency to find the hidden platform. Concerning retrieval of spatial learning an improved long-term memory without affecting the short-term memory was observed.
These results indicate that chronic exposure to extremely low frequency magnetic field exerts a positive effect on the acquisition and maintenance of spatial memory in rats.