Wake therapy is a well known treatment for depression, but I have a theory that for some people this sort of thing is a sign of sleep apnea. The reason being sl

Wake therapy is a well known treatment for depression, but I have a theory that for some people this sort of thing is a sign of sleep apnea. The reason being sleep breathing is more likely to be disturbed during REM which is more predominant in the later hours of sleep. So skipping those last 1 or 2 REM cycles could be skipping out on, for sleep apneacs, the most stressful parts of the sleep.