Study type: Medical/biological study (review/survey)

Direct observation of microcirculatory parameters in rat brain after local exposure to radio-frequency electromagnetic field. med./bio.

Published in: Environmentalist 2009; 29 (2): 186-189

Aim of study (acc. to author)

The report reviews recent publications of the authors (Masuda et al. 2007a and Masuda et al. 2007b) that investigated the effect of acute or subchronic exposure to radiofrequency electromagnetic fields on the cerebral microcirculation in rats using the monopole antenna that enabled local exposure to the brain. The report also shows the experimental details.

Background/further details

A "closed cranial window" was implanted into the parietal region.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 1,439 MHz
Exposure duration: continuous for 10 min
  • SAR: 0.6 W/kg average over mass (brain)
  • SAR: 2.4 W/kg average over mass (brain)
  • SAR: 4.8 W/kg average over mass (brain)
  • SAR: 0.16 W/kg average over mass (whole body)
  • SAR: 0.64 W/kg average over mass (whole body)
  • SAR: 1.28 W/kg average over mass (whole body)
Exposure 2: 1,439 MHz
Exposure duration: continuous 60 min/day, 5 days/week for 4 weeks
  • SAR: 2.4 W/kg average over mass (brain)

Exposure 1

Main characteristics
Frequency 1,439 MHz
Type
Charakteristic
Exposure duration continuous for 10 min
Additional info acute exposure
Exposure setup
Exposure source
Setup head of the rat positioned towards the antenna
Parameters
Measurand Value Type Method Mass Remarks
SAR 0.6 W/kg average over mass - brain -
SAR 2.4 W/kg average over mass - brain -
SAR 4.8 W/kg average over mass - brain -
SAR 0.16 W/kg average over mass - whole body -
SAR 0.64 W/kg average over mass - whole body -
SAR 1.28 W/kg average over mass - whole body -

Exposure 2

Main characteristics
Frequency 1,439 MHz
Type
Charakteristic
Exposure duration continuous 60 min/day, 5 days/week for 4 weeks
Additional info sub-chronic exposure
Exposure setup
Exposure source
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
SAR 2.4 W/kg average over mass - brain -

Reference articles

  • Masuda H et al. (2007): Effects of acute exposure to a 1439 MHz electromagnetic field on the microcirculatory parameters in rat brain.

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Investigated organ system:
Time of investigation:
  • before exposure
  • during exposure
  • after exposure

Main outcome of study (acc. to author)

No noticeable changes in the cerebral microcirculatory parameters due to radiofrequency electromagnetic field exposure were found. For further details see Masuda et al. 2007a and Masuda et al. 2007b.

Study character:

Study funded by

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