[Paradoxical sleep and memory processes in humans].

The beneficial effect of sleep on memory has often been reported. Moreover, REM sleep seems to be the best candidate for explaining this beneficial effect. Our aim in this paper is to point out the human literature concerning relationships between REM sleep and memory processes. The studies may be separated into three categories, on the basis of their methodological choice: effect of REM sleep deprivation on subsequent performance, effect of learning on subsequent REM sleep characteristics, enhancement of learning by acting on REM sleep. The data strengthen the assumption that REM sleep affects information processing. This topic "REM sleep and memory" is considered with respect to the chronopsychology of memory processes.