Delayed sleep phase syndrome (DSPS) is a most prevalent circadian rhythm sleep disorder and is marked by a delay in the timing of sleep episode compared to desired or necessary sleeping and wakeup ...

Taking longer to enter the dream phase can interfere with the consolidation of memories and upset the regulation of emotions, researchers say. Delayed REM sleep may be a potential indication of early ...

Think afternoon sunlight helps teens wind down at night? New research shows it can actually disrupt their melatonin and delay sleep, suggesting school schedules, not just screen time, may be the key ...