Study type: Medical/biological study (experimental study)

Effects of low-intensity electromagnetic fields on behavioral activity of rats. med./bio.

Published in: Folia Med (Plovdiv) 1999; 41 (3): 75-80

Aim of study (acc. to author)

To investigate comparatively the changes in behavioral activty of experimental animals after exposing them to low intensity electromagnetic fields in the meter, decimeter and centimeter ranges, applied at the same power density.

Background/further details

The study of rat behavioral activity is a valuable method for evaluation of brain changes after low intensity electromagnetic field exposures.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 2.375 GHz
Exposure duration: 10 times 10 min per day
Exposure 2: 433.93 MHz
Exposure duration: 10 times 10 min per day
Exposure 3: 27.13 MHz
Exposure duration: 10 times 10 min per day

Exposure 1

Main characteristics
Frequency 2.375 GHz
Type
Exposure duration 10 times 10 min per day
Exposure setup
Exposure source
  • not specified
Setup Rats were irradiated on the head area with their body protected by a screen.
Parameters
Measurand Value Type Method Mass Remarks
power density 100 W/m² - measured - -

Exposure 2

Main characteristics
Frequency 433.93 MHz
Type
Exposure duration 10 times 10 min per day
Exposure setup
Exposure source
Parameters
Measurand Value Type Method Mass Remarks
power density 100 W/m² - measured - -

Exposure 3

Main characteristics
Frequency 27.13 MHz
Type
Exposure duration 10 times 10 min per day
Exposure setup
Exposure source
Parameters
Measurand Value Type Method Mass Remarks
power density 100 W/m² - measured - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

The data suggest that exposure to electromagnetic fields (EMF) in the three ranges can slow down the formation of conditioned responses. This was clearly marked in the rats exposed to meter EMFs, whereas the effects of centimeter EMFs were delayed in time. At athermal dosage these effects are mild and the organism can easily adapt to the irradiation. The study shows that determination of the effects of different EMFs should be done for each of the ranges separately. Determination of the exact dosage of the electromagnetic fields can help to avoid their negative biological effects.

Study character:

Study funded by

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