Study type: Medical/biological study (experimental study)

Microwave dose-response relationships on two behavioral tasks. med./bio.

Published in: Ann N Y Acad Sci 1975; 247: 410-416

Aim of study (acc. to author)

Two studies were conducted to determine if dose-related effects of microwaves could be shown on two behavioral tasks. The first study was designed to examine microwave effects upon discriminative performance; the second study was conducted to determine the effects of exposure upon the acquisition of behaviour.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 2.45 GHz
Modulation type: CW
Exposure duration: 2 min unless subject began to convulse prior
  • power: 5 W minimum (10, 15, 20 and 25 W)
  • power: 25 W maximum
Exposure 2: 2.45 GHz
Modulation type: CW
Exposure duration: 2 min on - 1 min off during 1 h for 5 consecutive days
Exposure 3: 2.45 GHz
Modulation type: CW
Exposure duration: 2 min or until convulsion
  • power: 10 W minimum (10, 15, 20, 25 W)
  • power: 25 W maximum

Exposure 1

Main characteristics
Frequency 2.45 GHz
Type
Exposure duration 2 min unless subject began to convulse prior
Modulation
Modulation type CW
Exposure setup
Exposure source
  • 7.8 cm x 6.9 cm x 4.4 cm applicator operating in TE10 mode
Setup subjects were held in plastic restraining chairs in the experimental chamber; applicator held close to the subject's head by a copper-lined plastic helmet
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
power 5 W minimum estimated - 10, 15, 20 and 25 W
power 25 W maximum estimated - -

Exposure 2

Main characteristics
Frequency 2.45 GHz
Type
Exposure duration 2 min on - 1 min off during 1 h for 5 consecutive days
Modulation
Modulation type CW
Exposure setup
Exposure source
Parameters
Measurand Value Type Method Mass Remarks
power 10 W - estimated - -

Exposure 3

Main characteristics
Frequency 2.45 GHz
Type
Exposure duration 2 min or until convulsion
Modulation
Modulation type CW
Exposure setup
Exposure source
Parameters
Measurand Value Type Method Mass Remarks
power 10 W minimum estimated - 10, 15, 20, 25 W
power 25 W maximum estimated - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • during exposure

Main outcome of study (acc. to author)

No behavioral deficits were revealed after exposure under these conditions at dose rates less than about 15 W. Irradiation at higher levels produced either burns on the skin or severe convulsions without reliably causing changes in task performance. The results suggest that complex tasks (such as repeated acquisition) may be more sensitive to irradiation effects than are simple schedule control tasks, but this is a hypothesis.

Study character:

Study funded by

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