Sleep consists of two distinct states: REM (rapid eye movement) sleep and NREM (non-REM) sleep. Dreaming occurs mostly in REM sleep.
Sleep is a cyclic phenomenon, with four or five REM periods during the night, which accounts for about 25 percent of the total night’s sleep.
Examples Of Sleep...
Sleep problems are common among elderly people and can be problematic in people with Alzheimer's disease. They can occur at any stage of... Read more »
Earlier this month, I learned that I have mild sleep apnea. The path that led to my diagnosis was a bit round-about. If you remember in... Read more »
If you notice periods of depression that seem to accompany seasonal changes during the year, you may suffer from seasonal affective disorder (SAD).... Read more »