ArticleMalatová Z, Ahlers I.
Endocrinol Exp. 1977 Dec;11(4):241-7.
The diurnal rhythm of plasma and adrenal corticosterone level was examined in fed male Wistar rats and in these fasted for 24 and 48 h. In fed animals a remarkable diurnal rhythm of both parameters was found showing a nadir at the beginning and a zenith at the end of light period. After 24 h of fasting the zenith was shifted to the beginning of dark period without any other changes. After 48 h of fasting remarkable shifts were found resulting in a nadir at the beginning of dark period and a zenith at the middle of light period.