From: Harvey Newstrom (newstrom@newstaffinc.com)
Date: Fri Jul 02 1999 - 11:54:50 MDT
Sleep cycles vary in length. The first ones are shorter and they get longer
and longer throughout the night. Most people are short on REM
(Rapid-Eye-Movement or dream sleep) sleep, and already get enough non-REM or
shallow or total sleep. REM sleep removes depression, anxiety, stress, and
mental requirements. Non-REM sleep recovers physical energy and removes
sleepiness. You can tell which kind of sleep you are missing by the
symptoms.
If your sleep environment is noisy, or you have sleep apnea or snore, you
might be sleeping lightly and not getting enough REM sleep. This usually
makes you want to sleep more and more, and you still don't feel rested. REM
sleep is definitely the limiting factor in sleep deprivation. People can go
days without sleep, but can't go without dreaming, even if they sleep
without dreaming. After about 48 hours, the mind starts dreaming while you
are still awake. Hallucinations and waking-sleepwalking are symptoms of
REM-sleep deprivation and the brain trying to catch up on its dreaming.
If you miss sleep, you can recover sleep the next night by sleeping more
efficiently, that is you don't have to make up sleep on a one-to-one basis.
REM sleep is much more rigid. If you miss REM sleep, you get more REM sleep
the next night, and it is pretty much proportional to how much you missed.
It may take many nights to recover from a lack of dreaming.
-- Harvey Newstrom <mailto://newstrom@newstaffinc.com> <http://newstaffinc.com> Author, Consultant, Engineer, Legal Hacker, Researcher, Scientist.
This archive was generated by hypermail 2.1.5 : Fri Nov 01 2002 - 15:04:22 MST