[The dynamic behavioral characteristics of rats in a maze after isolated and combined exposures to ionizing radiation and psychoemotional stress]. / Osobennosti dinamiki povedeniia krys v labirinte posle izolirovannogo i kombinirovannogo vozdeistviia ioniziruiushchei radiatsii i psikhoémotsional'nogo stressa.

Rats exposed to ionizing radiation (0.5 Gy) and short-term immobilization stress displayed CNS activation accompanied by diminution of working memory when tested in radial maze. Irradiation, as compared to stress, caused exploratory activity inhibition that led to certain automatism in task fulfillment. Exposure to emotional stress after irradiation modified significantly rat performance causing CNS inhibition and long-term memory decline.

[Combined action of gamma and UHF radiation on conditioned reflex behavior of rats]. / Kombinirovannoe vozdeistvie gamma- i SVCh-izluchenii na uslovnoreflektornoe povedenie krys.

Dynamics of the conditioned behaviour of rats in a shuttle box was studied after combined exposure to Cs-gamma radiation (1 Gy, 1.32 Gy/min) and microwave radiation (2450 MHz, 1 mW/cm2, 3 h). The number of conditioned and interstimulus responses was found to decrease on day 5 after microwave + gamma irradiation and to increase on day 30 after gamma + microwave irradiation.

Results of a United States and Soviet Union joint project on nervous system effects of microwave radiation.

During the course of a formal program of cooperation between the United States and the Soviet Union concerning the biological effects of physical factors in the environment, it was concluded that duplicate projects should be initiated with the general goal of determining the most sensitive and valid test procedures for evaluating the effects of microwave radiation on the central nervous system. This report details an initial step in this direction. Male rats of the Fischer 344 strain were exposed or sham exposed to 10 mW/cm2 continuous wave microwave radiation at 2.45 GHz for a period of 7 hr. Animals were subjected to behavioral, biochemical, or electrophysiological measurements during and/or immediately after exposure. Behavioral tests used were passive avoidance and activity in an open field. Biochemical measurements were ATPase (Na+, K+; Mg2+, Ca2+) and K+ alkaline phosphatase activities. Electrophysiological measurements consisted of EEG frequency analysis. Neither group observed a significant effect of microwave irradiation on open field activity. Both groups observed changes in variability of the data obtained using the passive avoidance procedure, but not in the same parameters. The U.S. group, but not the USSR group, found significantly less Na+,K+-ATPase activity in the microwave-exposed animals compared to the sham exposed animals. Both groups found incidences of statistically significant effects in the power spectral analysis of EEG frequency, but not at the same frequency. The failure of both groups to substantiate the results of the other reinforces our contention that such duplicate projects are important and necessary.

[Spontaneous electrical activity of the rat cerebral cortex during microwave irradiation]. / Spontannaia élektricheskaia aktivnost' kory golovnogo mozga krys vo vremia mikrovolnovogo oblucheniia.

A study was made of changes in spontaneous electrical activity of rat brain cortex induced by a single exposure to microwave radiation (electromagnetic fields of 0.1, 1.0, 10, and 35 mW/cm2). The animals were exposed in anechoic chambers to continuous waves at 2450 MHz in conditions of continuous generation. The data obtained indicate that the EEG parameters change under the effect of microwave radiation. The technique applied permits to study the occurrence and development of the CNS reactions to microwave radiation at the time of action of the factor.