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...
According to the National Institute of Neurological Disorders and Stroke, over 40 million Americans suffer from a chronic sleep disorder. ... Read more »
I never cease to be amazed at the similarities of people from all over the world, every ethnicity, every country, and how small the world... Read more »
Full Question:Hi, I have suffered with migraine for over 34 years. This past year they have increased in frequency to the extent that I am... Read more »
"Disease exists, if either sleep or watchfulness be excessive" (Hippocrates, Aphorism LXXI, from a worthwhile article on sleep disturbance... Read more »
I became interested in sleep and sleep disorders when my husband was diagnosed with sleep apnea. I didn't realize at the time that I also... Read more »
Sleep Disorders are characterized by not being able to fall asleep, frequent waking, or sleep apnea. Dr. Jay Tarnow, in an article, ADHD and Sleep... 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
Irregular sleep-wake syndrome is sleeping without any real schedule. Alternative Names Sleep-wake syndrome - irregular Causes,... Read more »