Helsinki Symposium on Biological Effects of Electromagnetic Radiation
Interaction of ambient temperature and microwave power density on schedule-controlled behavior in the rat
Article first published online: 7 DEC 2012
This paper is not subject to U.S. copyright. Published in 1982 by the American Geophysical Union.
Volume 17, Issue 5S, pages 179S–184S, September-October 1982
How to Cite
1982), Interaction of ambient temperature and microwave power density on schedule-controlled behavior in the rat, Radio Sci., 17(5S), 179S–184S, doi:10.1029/RS017i05Sp0179S., and (
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Accepted: 17 JUN 1980
- Manuscript Received: 14 AUG 1978
Most guidelines of microwave exposure do not explicitly address effects of ambient temperature. Our experiment revealed that ambient temperature potentiates the behavioral effects of intensity of irradiation. Sixty-four adult male Long-Evans rats were trained to insert their heads into a food cup to obtain food pellets on a 1-min variable-interval schedule of reinforcement. Two groups of four rats each were then exposed to 2450-MHz CW microwaves for 15.5 hours under one of the following eight combinations of power density and air temperature: 8 or 14 mW/cm2 at 22°C; 0, 8, or 14 mW/cm2 at 26°C; and 0, 8, or 14 mW/cm2 at 30°C (relative humidity was 50% in all cases). Response rate of each rat following exposure was compared with its control rate at 0 mW/cm2 and 22°C. After exposure at 8 mW/cm2, response rates were reduced by a mean of 13.8% at 22°C, 27.5Percnt; at 26°C, and 77.5% at 30°C. After exposure at 14 mW/cm2, rates were reduced by a mean of 21.1% at 22°C, 43.7% at 26°C, and 80.0% at 30°C. In the absence of microwaves the higher temperatures caused only slight decreases in response rate.