... during the active part of the rats’ circadian cycle. These EEG and behavioral findings seen following CRF and GRF are consistent with the behaviors frequently correlated with the known circadian timing of the release of corticosteroids and growth hormone during the sleep-waking cycle in rat and human...

... wave sleep. Variations in PRL values at various states of the sleep-waking cycle were not very large, but a statistically significant peak occurred shortly after the sleep onset. The mean PRL values obtained after 5 min of paradoxical sleep were lower than those obtained during slow wave sleep. Mean GH...