A study on sleep stage change and REM sleep

Relationship between sleep stage change and REM sleep was examined using polysomnography. EEG, EMG and EOG measured in normal and sleep deprived condition were analyzed. REM sleep was classified in two states with and without rapid eye movement (REM(+), REM(-) respectively). The quantity of REM(+) was decreased in sleep deprived condition. The role of the REM sleep in recovery sleep after sleep deprivation was discussed.