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(Database last updated on Mar 27, 2024)
| ID Number | 595 | |
| Study Type | In Vivo | |
| Model | 1.25 GHz (PW) exposure to rats and analysis of behavioral and physiologic effects | |
| Details | Wistar rats were exposed to 1.25 GHz RF (PW - 10 usec pulse width, 50 nsec rise time) at SARs (whole body) of 0.84, 2.5, 7.6, and 23 W/kg (average power was set by changing the pulse repetition rate, each pulse produced an SAR 0.21 MW/kg) for 10 minutes in the far field using a standard horn antenna. In rats previously trained to press a lever for food pellets, only exposure at the highest level (causing an increase in colonic temperature of 2.5 degrees) alterered behavioral performance. The authors concluded that non-thermal levels of RF exposure had no effect on various behavioral tasks. A subsequent paper described updated whole body dosimetric evaluation using a calorimeter. In other studies, Sprague Dawley rats (males, 10-12 wk old) were exposed to 1.25 GHz (CW & PW- at 0.5 or 16 Hz) at SARs of 30.4 W/kg brain average (109 W/kg to the neck) in a restraining device to explore claims of "microwave sickness" including bradycardia, tachycardia, hypertension, hypotension and changes in the T-wave. Although mean heart rate, respiration rate and arterial pressure were not affected by exposure, changes in heart rate and pulse pressure were observed at higher exposure levels. Lowering of pulse pressure, tachycardia, and bradycardia was observed under hyperthermic conditions. The authors point out that the increased peripheral resistance during MW hyperthermia is contrary to normal hyperthermic response in animals. |
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| Findings | Effects (only at thermal levels) | |
| Status | Completed With Publication | |
| Principal Investigator | Walter Reed Army Inst., USA | |
| Funding Agency | AF, USA | |
| Country | UNITED STATES | |
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