Non-rapid Eye Movement Sleep
Non-rapid eye movement, or NREM, is, collectively, sleep stages 1–3, previously known as stages 1–4. Rapid eye movement sleep (REM) is not included. There are distinct electroencephalographic and other characteristics seen in each stage. Unlike REM sleep, there is usually little or no eye movement during this stage. Dreaming is rare during NREM sleep, and muscles are not paralyzed as in REM sleep. People who do not go through the sleeping stages properly get stuck in NREM sleep and because muscles are not paralyzed, a person may be able to sleepwalk. In addition, there is a parasympathetic dominance during NREM. During the period of Non-REM sleep, the mindset of a person is more organized. It has been found, through several experiments that low levels of stage 4 sleep are found in about 40-50% of acute and chronic schizophrenics who typically portray abnormal non-rapid eye movement sleep.
Read more about Non-rapid Eye Movement Sleep: Stages of NREM Sleep, Dreaming During NREM, Polysomnography, Slow-wave Sleep
Famous quotes containing the words eye, movement and/or sleep:
“And all my days are trances,
And all my nightly dreams
Are where thy dark eye glances,
And where thy footstep gleams—
In what ethereal dances,
By what eternal streams.”
—Edgar Allan Poe (1809–1849)
“I am a writer and a feminist, and the two seem to be constantly in conflict.... ever since I became loosely involved with it, it has seemed to me one of the recurring ironies of this movement that there is no way to tell the truth about it without, in some small way, seeming to hurt it.”
—Nora Ephron (b. 1941)
“After I went to bed I had a curious fancy as to dreams. In sleep the doors of the mind are shut, and thoughts come jumping in at the windows. They tumble headlong, and therefore are so disorderly and strange. Sometimes they are stout and light on their feet, and then they are rational dreams.”
—James Boswell (1740–1795)