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...
A good night’s sleep is important to good health. Many of us toss and turn or watch the clock when we can’t sleep for a night or two.... Read more »
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 »
"Sleep is very important for children and teens, not only for development, but also for behavior during the day. When children have autism... Read more »
The causes of sleepless nights are numerous and varied, everything from noisy neighbors to stress to a sleep disorder. Another cause of... Read more »
Although sleep issues have been linked with headaches and Migraine for more than 100 years, information about the types and prevalence of specific... 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 »
Source: ADAM Encyclopedia
Sleep disorders involve any difficulties related to sleeping, including difficulty falling or staying asleep, falling asleep at inappropriate times,... Read more »
Source: ADAM Encyclopedia
Sleep disorders in the elderly involve any disrupted sleep pattern, such as problems falling or staying asleep, too much sleep, or abnormal behaviors... Read more »
Source: ADAM Encyclopedia
Relieving chronic pain and controlling medical conditions such as frequent urination may improve sleep in some people. Treating depression can also... Read more »