[Effect of aminazine, caffeine and the intensity of mental stress on psychophysiological functions and work effectiveness of humans].

The effect of CNS activation and mental load on human organism depends on the operator's working routine and is, to a great extent, connected with broad individual peculiarities of the tested subjects. The CNS activation increase is conducive to a favourable effect of activities under low mental loads and it also intensifies the appearance of erroneous actions under medium and high loads. The CNS activation decrease does not reduce the capacity to detect significant signals but tells on the speed and correctness of decision making. The application of the variance analysis while experimentally studying the combined effect of the CNS activation and mental load gives sufficient information on the effect of the CNS activation, load intensity and duration and the interaction thereof which can attain considerable values.