[Patterns in the reacting of the hypophyseal-adrenal cortex system to multiply repeated stressors]

A degree of a blood corticosteroid increase to repeated electroshock depended on stress strength in rats. The repeated stress of small intensity (0.3 mA) resulted in an increase of reaction with compare to single stress response. The stressor of high intensity (0.5 mA) resulted in a decrease of reaction with compare to single one. There were no differences in reaction to single and repeated stressor of very high intensity (0.9 mA). There was an increase of reactivity to ACTH of incubated adrenals from rats which were exposed to repeated stress of small intensity (0.3 mA) and a decrease of reactivity of adrenal from animals which were exposed to repeated stress of high intensity (0.7 mA).