[Emotional stress-induced changes in catecholamines in the nuclei of the brains of rats differing in "open-field" behavior].

The open-field test was used to study the role of initial emotionality in participation of brain catecholamines (CAs) in the BP control under emotional stress. The rats different in emotionality differed from each other in the level of CAs in single brain nuclei under normal conditions. Under stress, opposite CAs changes occurred in rats differing by their initial emotionality, in noradrenaline-synthetizing brain nuclei only. The neurochemical processes (features) which took part in the central BP control under stress were different in rats differing in their initial emotionality.