Study type: Medical/biological study (experimental study)

Local cerebral blood flow after microwave exposure med./bio.

By: Oscar KJ, Gruenau SP, Folker MT, Rapoport SI
Published in: Brain Res 1981; 204 (1): 220-225
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Aim of study (acc. to editor)

To study whether microwaves alter local cerebral blood flow.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 2.8 GHz
Modulation type: pulsed
Exposure duration: continuous for 5, 15, 30, 45, or 60 min

Exposure 1

Main characteristics
Frequency 2.8 GHz
Type
Exposure duration continuous for 5, 15, 30, 45, or 60 min
Modulation
Modulation type pulsed
Pulse width 2 µs
Repetition frequency 500 Hz
Exposure setup
Exposure source
Sham exposure A sham exposure was conducted.
Additional info Sham irradiation was performed for 5, 30, or 60 min.
Parameters
Measurand Value Type Method Mass Remarks
power density 15 mW/cm² mean - - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

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

Main outcome of study (acc. to author)

The data indicate that microwave exposure causes a significant increase in local cerebral blood flow in the conscious rat. After 60 min of irradiation, the blood flow in all 17 brain regions sampled increased a minimum of 39%; many increased well over 100%. The data affect the selection of techniques to measure quantitavely the effects of microwaves on blood-brain barrier permeability. The authors conclude that previously reported blood-brain barrier permeability changes may be less in magnitude than originally indicated.

Study character:

Study funded by