To investigate the effects of irradiation on thermoregulatory behavior of monkeys.
Monkeys were trained to regulate body temperature by selecting airstreams of 10 and 50°C. Then, to study the ability of the monkeys to utilize microwaves as a source of thermalizing energy, 2450 MHz continuous wave microwaves accompanied by thermoneutral (30°C) air were substituted for the 50°C air.
Modulation type: CW
Exposure duration: intermittent, 3 sessions of 2 h each
|Exposure duration||intermittent, 3 sessions of 2 h each|
|Chamber||Shielded anechoic chamber/ 1.8 m x 1.8 m x 2.5 m|
|Setup||A monkey was chair restrained inside a 51cm x 33 cm x 30 cm ventilated Styrofoam box that was located inside the exposure chamber.|
|Additional info||Exposure duration: Three or more 2 hour sessions; EMF was activated/deactivated when the monkey pulled the cord for warm air/ cold air respectively|
|power density||200 W/m²||unspecified||measured||-||25 mW/cm² and 30 mW/cm²|
The percentage of time that the animals selected microwave irradiation paired with thermoneutral air averaged 90% at 20 and at 25 mW/cm². The mean percentage declined reliably to 81% at 30 mW/cm², confirming the monkey's ability to utilize microwaves as a source of thermal energy during the course of behavioral thermoregulation. All monkeys readily made the warm-air to microwave-field transition, regulating rectal temperature with precision by sequentially selecting 10°C air, then microwave irradiation accompanied by 30°C air. Although the selection of cooler air resulted in a slight decrease of skin temperatures, normal rectal temperature was maintained. The data indicate that the monkeys can utilize a microwave source in conjunction with convective cooling to regulate body temperature behaviorally.