Study type: Medical/biological study (experimental study)

Disturbance of the magnetic field did not affect spatial memory. med./bio.

Published in: Physiol Res 2014; 63 (3): 377-385

Aim of study (acc. to author)

To investigate the effects of previous training and exposure to extremely low frequency magnetic fields on memory and learning in rats.

Background/further details

Four groups of rats were examined (n=10 per group): 1.) Morris water maze training + sham exposure, 2.) magnetic field exposure, 3.) Morris water maze training + magnetic field exposure and 4.) sham exposure.
Training of the rats in the Morris water maze (group 1 and 3) was performed before the exposure/sham exposure period. After the 90 days of exposure/sham exposure, all groups were subjected to a 6-day training and testing in the Morris water maze.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 50 Hz
Exposure duration: continuous for 90 days

Exposure 1

Main characteristics
Frequency 50 Hz
Type
Exposure duration continuous for 90 days
Exposure setup
Exposure source
Chamber cage and its equipment were made of plastic and glass, five rats per cage
Setup diameter of coils 1.4 m, temperature differences between exposure and sham exposure were less than 0.2°C
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
magnetic flux density 100 µT - - - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

Rats that were trained previously in the Morris water maze (group 1 and 3) showed significantly better memory and learning abilities than not trained rats. However, no difference in the memory and learning ability was observed between magnetic field exposed rats and sham exposed rats.
The results indicate that exposure to extremely low frequency magnetic fields has no influence on the memory and learning ability in rats.

Study character:

Study funded by

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