Re: Swingles Theta/Beta ratio at O1

[Guest guest]

Hi Pete

Could you expand on your statement below?

O1 should be the highest alpha site on the head. Moving forward from there, alpha switches to the right and should be higher over the right hemisphere everywhere else. That's one reason Alpha Theta training is often done at O1/A1.I thought the back right quadrant should have the highest alpha.

Mark

Re: Swingles Theta/Beta ratio at O1

Bruce,O1 should be the highest alpha site on the head. Moving forward from there, alpha switches to the right and should be higher over the right hemisphere everywhere else. That's one reason Alpha Theta training is often done at O1/A1.Pete

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[Guest guest]

Hi Pete

Could you expand on your statement below?

O1 should be the highest alpha site on the head. Moving forward from there, alpha switches to the right and should be higher over the right hemisphere everywhere else. That's one reason Alpha Theta training is often done at O1/A1.I thought the back right quadrant should have the highest alpha.

Mark

Re: Swingles Theta/Beta ratio at O1

Bruce,O1 should be the highest alpha site on the head. Moving forward from there, alpha switches to the right and should be higher over the right hemisphere everywhere else. That's one reason Alpha Theta training is often done at O1/A1.Pete

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[Guest guest]

Bruce

also bases his choice of marker ratios on a clinical databse of 700 people matching symptom ratings and EEG markers.

Mark

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[Guest guest]

ah yes, so it's not logical but rather emperical.

Bruce

>

>

> Bruce

> also bases his choice of marker ratios on a clinical databse of 700

people matching symptom ratings and EEG markers.

> Mark

> New Topic

> MARKETPLACE

> Going Green: Your resource for green living

>

>

> ------------------------------------------------------------------------------

>

> Going Green: Your resource for green living

> Switch to: Text-Only, Daily Digest . Unsubscribe . Terms of Use.

>

[Guest guest]

ah yes, so it's not logical but rather emperical.

Bruce

>

>

> Bruce

> also bases his choice of marker ratios on a clinical databse of 700

people matching symptom ratings and EEG markers.

> Mark

> New Topic

> MARKETPLACE

> Going Green: Your resource for green living

>

>

> ------------------------------------------------------------------------------

>

> Going Green: Your resource for green living

> Switch to: Text-Only, Daily Digest . Unsubscribe . Terms of Use.

>

[Guest guest]

Mark,Mark,The right-rear quadrant would take in T4, T6, P4 and O2, and I would expect that it would be the highest alpha and 6-8 Hz theta on the head.  However, the point O1 is generally higher than O2.

I'm attaching an image that demonstrates what I mean.Pete-- Van Deusenpvdtlc@...http://www.brain-trainer.com

USA 305 433 3160BR 47 3346 6235The Learning Curve, Inc.

On Tue, Dec 29, 2009 at 8:58 PM, Mark Baddeley <mbadderl@...> wrote:

Could you expand on your statement below?

O1 should be the highest alpha site on the head.  Moving forward from there, alpha switches to the right and should be higher over the right hemisphere everywhere else.  That's one reason Alpha Theta training is often done at O1/A1.I thought the back right quadrant should have the highest alpha.

1 of 1 Photo(s)

[Guest guest]

Mark,No.  You have one site (O1) higher on the left, and even though it may be the highest, it is offset if you look at the whole quadrant by all the other sites higher on the right.Pete--

Van Deusenpvdtlc@...http://www.brain-trainer.comUSA 305 433 3160BR 47 3346 6235The Learning Curve, Inc.

On Thu, Dec 31, 2009 at 5:08 AM, Mark Baddeley <mbadderl@...> wrote:

 

Hi Pete

I am still in some confusion. Does this mean T4,T6 and P4 would be higher than O1 in alpha amplitude?

Thanks for the pic.

[Guest guest]

Mark,

Demos in his book "Getting Started with Neurofeedback" describes, in part, how to choose sensor placement for A/T training.

Demos states (page 191), "Many clients benefit from both alpha and theta enhancement. Sensor placement is always in a posterior location, either at the midline or in the right hemisphere (RH) or left hemisphere (LH). Sensor placement follow the principles of the BAT triad. Do not train in a way that contributes to an already existing problem. If in doubt, chose a midline site such as Pz. Proceed as follows: Assess with two-channels, each with a referential (monopolar) montage, one scalp sensor at P3 and the other at P4. Consider the following six considerations:

1. If RH alpha is greater than or equal to LH alpha and RH theta is approximately equal to LH theta then select a midline site for sensor placement such as Pz.

2. If LH alpha is greater than RH alpha select P4 or O2 sensor placement.

3. If alpha asymmetry is normal but RH theta is greater than LH theta then train at O1.

4. Pay special attention to the Putnam's (1989) Dissociative Experiences Scale (DES). Scores of 30% and higher strongly suggest the possibility of dissociative identity disorder (DID). Neurotherapy for DID is an advanced skill.

5. P3 placements are contraindicated for depressed clients.

6. Inhibit either alpha or theta in accord with the EEG assessment."

LORETA assessment indicates that posterior alpha-rhythm generator is located midway between Pz and Oz (POz) and many practitioners train "alpha" at this location with eyes closed.

JD Elder