Although we have an increasingly sure grasp of much of its proximate circuitry, we continue to lack the ultimate physiological rationale of rapid eye movement (REM) sleep. In this paper, we propose that REM sleep derives both its proximate mechanisms as well as its ultimate cause from photoperiodism. (This refers to the means whereby many organisms translate information about day length into appr…
A new study reveals that getting sunlight before 10 a.m. significantly helps align sleep schedules. Researchers found that just 30 minutes of early exposure shifts the sleep midpoint earlier by 23 minutes.
