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Original article.

From: 
Jan <ellison@spiritone.com>
Newsgroups: 
alt.out-of-body
Subject: 
Re: Delta, Theta, Alpha
 
Mark Baysinger wrote:

> This morning I had my first OOBE! WOO HOO!
>

Woo Hoo ! Yeah!! Isn't it great!?

> Anyone here know what the frequencies are for each state? And, what part
> of mental activity; ie: Dreaming, Relaxing, Concentrating, that these
> states occurr in? If you know a link to a site that might help, I'd very
> much appreciate it.
>

Here you go. . . taken from the web site at the bottom of the page.However,
I think there is also a Gamma stage . . .which is not gone
into here.****Since the first EEG was devised early in this century,
scientists have found that the brain has a tendency to produce brain waves
of
four distinct varieties, which they have called beta, alpha, theta
and delta.

BETA.

The most rapid brain waves, beta waves, range in frequency from
about 14 cycles per second (called 14 Hertz, abbreviated Hz) to
more than 100 Hz (some scientists now refer to brain waves above
30 Hz as Gamma waves). When we are in a normal waking state,
eyes open, focusing on the world outside ourselves, or dealing
with concrete, specific problems, beta waves (particularly beta
waves between 14 and 40 Hz.) are the most dominant and powerful
waves in the brain. Beta waves are associated with alertness,
arousal, concentration, cognition and -- at excessive levels --
anxiety.

ALPHA.

As we close our eyes and become more relaxed, passive, or
unfocused, brain wave activity slows down, and we produce bursts
of alpha waves, which range in frequency from about 8 to 13 Hz.
If we become quite relaxed and mentally unfocused, alpha waves
become dominant throughout the brain, producing a calm and
pleasant sensation called the "alpha state." The alpha state
seems to be the brain's "neutral" or idling state, and people
who are healthy and not under stress tend to produce a lot of
alpha activity. Lack of significant alpha activity can be a
sign of anxiety, stress, brain damage or illness.

THETA.

As calmness and relaxation deepen into drowsiness, the brain
shifts to slower, more powerfully rhythmic theta waves, with a
frequency range of about 4 to 8 Hz. Theta has been called the
"twilight state," between waking and sleep. It's often
accompanied by unexpected, dreamlike mental images. Often these
images are accompanied by vivid memories, particularly childhood
memories. Theta offers access to unconscious material,
reveries, free association, sudden insight, creative ideas.
It's a mysterious, elusive state, and for a long time
experimenters had a difficult time studying it because it is
hard to maintain for any period of time -- most people tend to
fall asleep as soon as they begin generating large amounts of
theta.

DELTA.

As we fall asleep the dominant brain waves become delta, which
are even slower than theta, in the frequency range below 4 Hz.
When most of us are in the delta state we're either asleep or
otherwise unconscious. However, there is growing evidence that
individuals may maintain consciousness while in a dominant delta
state. This seems to be associated with certain deep
trance-like, transcendent or "non- physical" states.***

and the site it's from:

ftp://ftp.aquathought.com/pub/mind-l/megabrain/bwave.txt

Jan

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Subject: 
Re: Delta, Theta, Alpha
Newsgroups: 
alt.out-of-body
 
 
http://www.hchs.de./brain_research/index.html 
  
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