[Statistical relationship between "slow-wave sleep" and "paradoxical sleep" in rats]. / Relations statistiques entre phases de "sommeil lent" et phases de "sommeil paradoxal" chez le Rat

ABSTRACT

In the Rat, statistical analysis of slow sleep (SS) and paradoxical sleep (PS) episodes disclosed two significant (p less than 0,01) positive correlations (1) Over a four-hour period, the mean duration of PS episodes was correlated to the mean of the just preceding "light" SS episodes; (2) On the contrary, from cycle to cycle of sleep-wakefulness, the duration of each PS episode was correlated to that of the "light" SS episode of the next cycle.