RE: Delta

[Guest guest]

Thanks so much.

From:

braintrainer [mailto:braintrainer ] On Behalf

Of

Sent: Sunday, February 03, 2008 12:48 PM

To: braintrainer

Subject: RE: Delta

Connie,

I work

with AD/HD., mostly among adults. Many of my clients have very high delta

(and other slow wave activity) across the brain, but particularly in the

frontal regions. I read a lot about rations on this list but I have yet

to get a clear definition of a bad ratio. For example Theta/Beta > 3

may be a problem but I have trained theta down and brought the ration to

something like 1.5 but still see problems with

attention. There are so many different sites involved in even the

“simplest” problem that training one area only means you have to then move on

to another.

In

addition there is an inverse relationship between amplitude and frequency so it

may be normal to have delta show greater amplitude than, for example,

theta. It is a problem if it relates to a specific issue presented by the

client – paying attention for sustained periods of time for example. I am

most concerned when I see high delta in the frontal regions when the client is

trying to perform a task, as is so often the case. Even attending to the

feedback screen can cause the delta to elevate, in which case I train for short

periods of time up to about 5 minutes with 3 to 5 “runs” in a session.

(Otherwise the client falls asleep.) I then work to lengthen the time of

each run, while training down delta. I try to get in at least 20 minutes

in each session. Typically I am training up faster waves such as low beta

and beta, depending on the site. A lot of it is trial and error – or at

least that has been my experience. In general slow wave activity has to

be looked at very carefully.

Mike

_________________________________________

MICHAEL A.

MARTIN, M.Ed.

Director,

New Horizons Counseling Center, Inc.

2470 Gray

Falls Drive, Suite 225

Houston, TX

77077

Tel:

Fax:

***CONFIDENTIALITY

NOTICE***

This

e-mail is the property of the New Horizons Counseling Center and may contain

confidential and privileged information that is intended for the sole use of

the recipient(s). Any review, use, distribution or disclosure by

individuals other than the intended recipient(s) is strictly prohibited. If you

are not the intended recipient(s) (or authorized to receive for the recipient),

please contact the sender and delete all copies of the message. Thank

you.

From: braintrainer

[mailto:braintrainer ] On Behalf Of Van Deusen

Sent: Sunday, February 03, 2008 3:34 AM

To: braintrainer

Subject: Re: Delta

Connie,

I

don't know a number or a ratio. I recognize it when I see is either on

the Histograms or Maps pages. If Delta dominates the EEG on the

Histograms page, then it may be a problem (especially if the client has

attention or performance issues). It it dominates on the Maps pages,

ditto. Especially if it spreads (on the Maps) or gets taller--with

artifact removed--(on the Histograms) at task, then it would concern me.

It's

not uncommon for delta to be greater than theta, but it is the combination of

the two that suggests that the brain is dominated by slowwave activity and will

thus have difficulty with logical/rational tasks, language-based processing,

sequential/hierarchical thought, etc.

It's

like great art: I know it when I see it.

Pete

On

Feb 2, 2008 11:38 PM, conniewelsh2

wrote:

Pete, what type of delta would be considered

excessive? If 2-4 is

greater than theta would that be too much?

We have a ratio or value for everything else.

..

_,_._,___

--

Van Deusen

pvdtlc@...

http://www.brain-trainer.com

305/433-3160

The Learning Curve, Inc.