Some neurotropic effects of low-intensity electromagnetic waves in rats with different typological characteristics of higher nervous activity.

The effects of low-intensity electromagnetic waves (4200 MHz, modulated with quasichaotic signals at 20-20,000 Hz, energy density 15 microW/cm2; specific energy absorption not greater than 15 mJ/kg) on the neurochemical systems of the brain and on behavioral reactions were studied in experimental animals with different typological characteristics of higher nervous activity. These studies showed that electromagnetic waves produced marked changes in the state and activity of the monoaminergic mediator systems which were in general terms concordant with changes at the integrative level (mostly selective inhibitory effects). The nature of these processes depended to a significant extent on the typological characteristics of the animals.