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[Responses of hypophyseal-adrenocortical system to stressor during repeated stress]
1I.P. Pavlov Institute of Physiology of the Russian Acad. Sci., St. Petersburg, Russia.
Rossiiskii Fiziologicheskii Zhurnal Imeni I.M. Sechenova
|April 16, 1999
Abstract:
The corticosterone concentrations were determined in the blood of unrestrained rats exposed to 7 successive trials with 30-min. intervals. This study revealed that hormonal responses of the pituitary-adrenocortical system to stress were decreased, whereas the time of the system recovery was reduced after re-exposure to electric shock. The change seems to be dependent on the strength of the stress agent and the number of re-exposures.