[The open-field behavior of neuroticized rats]

A detailed study has been carried out of the behaviour in the open field of the lines of rats with different functional state of the nervous system after prolonged neurotization in dependence on the phase of circadian rhythm and terms after the end of the influence. Significant changes have been shown by the amplitude of circadian rhythms of emotionality and motor activity. It is established that the reaction of the rats lines to prolonged neuroticizing action depends on the phase of the circadian rhythm, the time after its termination and on genetically determined level of excitability of the nervous system.